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The dataset generation failed because of a cast error
Error code: DatasetGenerationCastError
Exception: DatasetGenerationCastError
Message: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 1 new columns ({'Title'}) and 1 missing columns ({'ParentId'}).
This happened while the csv dataset builder was generating data using
hf://datasets/Leventiir/answer_train/question_train.csv (at revision 14b938557de7f70479541f4a4591f3cae1c906e5)
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)
Traceback: Traceback (most recent call last):
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 2011, in _prepare_split_single
writer.write_table(table)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/arrow_writer.py", line 585, in write_table
pa_table = table_cast(pa_table, self._schema)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/table.py", line 2302, in table_cast
return cast_table_to_schema(table, schema)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/table.py", line 2256, in cast_table_to_schema
raise CastError(
datasets.table.CastError: Couldn't cast
Id: int64
OwnerUserId: double
CreationDate: string
Score: int64
Title: string
Body: string
-- schema metadata --
pandas: '{"index_columns": [{"kind": "range", "name": null, "start": 0, "' + 936
to
{'Id': Value(dtype='int64', id=None), 'OwnerUserId': Value(dtype='float64', id=None), 'CreationDate': Value(dtype='string', id=None), 'ParentId': Value(dtype='int64', id=None), 'Score': Value(dtype='int64', id=None), 'Body': Value(dtype='string', id=None)}
because column names don't match
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1321, in compute_config_parquet_and_info_response
parquet_operations = convert_to_parquet(builder)
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 935, in convert_to_parquet
builder.download_and_prepare(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1027, in download_and_prepare
self._download_and_prepare(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1122, in _download_and_prepare
self._prepare_split(split_generator, **prepare_split_kwargs)
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 1882, in _prepare_split
for job_id, done, content in self._prepare_split_single(
File "/src/services/worker/.venv/lib/python3.9/site-packages/datasets/builder.py", line 2013, in _prepare_split_single
raise DatasetGenerationCastError.from_cast_error(
datasets.exceptions.DatasetGenerationCastError: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 1 new columns ({'Title'}) and 1 missing columns ({'ParentId'}).
This happened while the csv dataset builder was generating data using
hf://datasets/Leventiir/answer_train/question_train.csv (at revision 14b938557de7f70479541f4a4591f3cae1c906e5)
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)Need help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
Id int64 | OwnerUserId float64 | CreationDate string | ParentId int64 | Score int64 | Body string |
|---|---|---|---|---|---|
536 | 161 | 2008-08-02T18:49:07Z | 502 | 9 | <p>You can use ImageMagick's convert utility for this, see some examples in <a href="https://web.archive.org/web/20120413111338/http://studio.imagemagick.org/pipermail/magick-users/2002-May/002636.html" rel="nofollow">http://studio.imagemagick.org/pipermail/magick-users/2002-May/002636.html</a>
:</p>
<blockquote>
<pre... |
538 | 156 | 2008-08-02T18:56:56Z | 535 | 23 | <p>One possibility is Hudson. It's written in Java, but there's integration with Python projects:</p>
<blockquote>
<p><a href="http://redsolo.blogspot.com/2007/11/hudson-embraces-python.html" rel="nofollow">Hudson embraces Python</a></p>
</blockquote>
<p>I've never tried it myself, however.</p>
<p>(<strong>Update... |
541 | 157 | 2008-08-02T19:06:40Z | 535 | 20 | <p>We run <a href="http://buildbot.net/trac">Buildbot - Trac</a> at work, I haven't used it too much since my code base isn't part of the release cycle yet. But we run the tests on different environments (OSX/Linux/Win) and it sends emails --and it's written in python.</p> |
660 | 197 | 2008-08-03T12:09:18Z | 535 | 14 | <p>Second the Buildbot - Trac integration. You can find more information about the integration on the <a href="http://buildbot.net/trac/wiki/BuildbotAndTrac">Buildbot website</a>. At my previous job, we wrote and used the plugin they mention (tracbb).
What the plugin does is rewriting all of the Buildbot urls so you c... |
777 | 150 | 2008-08-03T18:32:27Z | 766 | 5 | <p>I don't have any experience with <a href="http://www.SiteGround.com" rel="nofollow">http://www.SiteGround.com</a> as a web host personally. </p>
<p>This is just a guess, but it's common for a shared host to support Python and MySQL with the MySQLdb module (e.g., GoDaddy does this). Try the following CGI script ... |
783 | 189 | 2008-08-03T18:40:09Z | 773 | 52 | <p>Can you show us your code?</p>
<p>The example on the Python docs is quite straightforward:</p>
<pre><code>groups = []
uniquekeys = []
for k, g in groupby(data, keyfunc):
groups.append(list(g)) # Store group iterator as a list
uniquekeys.append(k)
</code></pre>
<p>So in your case, data is a list of no... |
802 | 1,384,652 | 2008-08-03T20:07:05Z | 766 | 4 | <p>I uploaded it and got an internal error</p>
<pre><code>Premature end of script headers<br></code></pre>
<p>After much playing around, I found that if I had</p>
<pre><code>import cgi<br>import cgitb; cgitb.enable()<br>import MySQLdb<br></code></pre>
<p>It would give me a much more useful answer and say th... |
1,478 | 305 | 2008-08-04T18:26:13Z | 1,476 | -1 | <p>As far as I can tell Python, up through 2.5, only supports hexadecimal & octal literals. I did find some discussions about adding binary to future versions but nothing definite.</p> |
1,479 | 269 | 2008-08-04T18:27:26Z | 1,476 | -1 | <p>I am pretty sure this is one of the things due to change in Python 3.0 with perhaps bin() to go with hex() and oct().</p>
<p>EDIT:
lbrandy's answer is correct in all cases.</p>
|
1,484 | 2,089,740 | 2008-08-04T18:34:45Z | 1,476 | 57 | <pre><code>>>> print int('01010101111',2)
687
>>> print int('11111111',2)
255
</code></pre>
<p>Another way.</p>
|
1,619 | 92 | 2008-08-04T21:54:11Z | 766 | 17 | <p>MySQLdb is what I have used before.</p>
<p>If you host is using Python version 2.5 or higher, support for sqlite3 databases is built in (sqlite allows you to have a relational database that is simply a file in your filesystem). But buyer beware, sqlite is not suited for production, so it may depend what you are ... |
1,780 | 77 | 2008-08-05T01:14:30Z | 1,734 | 8 | <P>If you are looking for user facing interaction, stick with xml. It has more support, understanding, and general acceptance currently. If it's internal, I would say that protocol buffers are a great idea.</P>
<P>Maybe in a few years as more tools come out to support protocol buffers, then start looking towards that ... |
1,840 | 116 | 2008-08-05T02:54:54Z | 1,829 | 8 | <p><strong>On Linux:</strong></p>
<ul>
<li>set raw mode</li>
<li>select and read the keystroke</li>
<li>restore normal settings</li>
</ul>
<pre>
import sys
import select
import termios
import tty
def getkey():
old_settings = termios.tcgetattr(sys.stdin)
tty.setraw(sys.stdin.fileno())
select.select([sys.s... |
1,852 | 116 | 2008-08-05T03:11:55Z | 1,829 | 6 | <p><strong>On Windows:</strong></p>
<pre><code>import msvcrt
answer=msvcrt.getch()
</code></pre>
|
1,857 | 2,089,740 | 2008-08-05T03:27:03Z | 1,854 | 341 | <pre><code>>>> import os
>>> print os.name
posix
>>> import platform
>>> platform.system()
'Linux'
>>> platform.release()
'2.6.22-15-generic'
</code></pre>
<p>See: <a href="https://docs.python.org/2/library/platform.html">platform â Access to underlying platformâs ident... |
1,870 | 30 | 2008-08-05T03:51:57Z | 1,829 | 2 | <p>Wow, that took forever. Ok, here's what I've ended up with </p>
<pre><code>#!C:\python25\python.exe<br>import msvcrt<br>print """Menu<br>1) Say Foo <br>2) Say Bar"""<br>while 1:<br> char = msvcrt.getch()<br> if char == chr(27): #escape<br> break<br> if char == "1":<br> print "foo"<br> ... |
1,871 | 216 | 2008-08-05T03:57:22Z | 1,854 | 112 | <p>Dang -- lbrandy beat me to the punch, but that doesn't mean I can't provide you with the system results for Vista!</p>
<pre><code>>>> import os
>>> os.name
'nt'
>>> import platform
>>> platform.system()
'Windows'
>>> platform.release()
'Vista'
</code></pre>
|
1,879 | 116 | 2008-08-05T04:13:53Z | 1,854 | 91 | <p>For the record here's the results on Mac:</p>
<pre><code>>>> import os
>>> os.name
'posix'
>>> import platform
>>> platform.system()
'Darwin'
>>> platform.release()
'8.11.1'
</code></pre>
|
1,885 | 50 | 2008-08-05T04:28:03Z | 1,829 | 0 | <p>The reason msvcrt fails in IDLE is because IDLE is not accessing the library that runs msvcrt. Whereas when you run the program natively in cmd.exe it works nicely. For the same reason that your program blows up on Mac and Linux terminals.</p>
<p>But I guess if you're going to be using this specifically for wind... |
2,316 | 259 | 2008-08-05T13:45:38Z | 2,311 | 14 | <p>Do you need to open the locfile in binary using <code>rb</code>?</p>
<pre><code>f = open (locfile, "rb")
</code></pre>
|
2,317 | 17 | 2008-08-05T13:45:47Z | 2,311 | 2 | <p>Well if you go under the properties of your file in Windows or a *nix environment, you will notice two sizes. One is the sector size, and one is the actual size. The sector size is the number of sectors in bytes that are used up on your hard disk. That is because two files cannot be in the same sector with most m... |
2,510 | 269 | 2008-08-05T15:59:24Z | 2,311 | 0 | <p>Small files take up a whole node on the filesystem whatever size that is.</p>
<p>My host tends to report all small files as 4kb in ftp but in a shell gives an accurate size so it might be a 'feature' common to ftp clients.</p> |
2,937 | 275 | 2008-08-05T22:34:25Z | 2,933 | 189 | <p>First you will need some GUI library with Python bindings and then (if you want) some program that will convert your python scripts into standalone executables.</p>
<p><strong>Cross-platform GUI libraries with Python bindings (Windows, Linux, Mac)</strong></p>
<p>Of course, there are many, but the most popular tha... |
2,941 | 92 | 2008-08-05T22:40:17Z | 2,933 | 0 | <p>You don't need to <em>compile</em> python for Mac/Windows/Linux. It is an interpreted language, so you simply need to have the Python interpreter installed on the system of your choice (it is available for all three platforms).</p>
<p>As for a GUI library that works cross platform, Python's <a href="http://www.t... |
2,980 | 188 | 2008-08-06T00:29:36Z | 2,933 | 2 | <p>Since python is installed on nearly every non-Windows OS by default now, the only thing you really need to make sure of is that all of the non-standard libraries you use are installed.</p>
<p>Having said that, it is possible to build executables that include the python interpreter, and any libraries you use. Thi... |
4,128 | 17 | 2008-08-06T23:40:43Z | 3,976 | 0 | <p>have you tried watching the traffic between the GUI and the serial port to see if there is some kind of special command being sent across? Also just curious, Python is sending ASCII and not UTF-8 or something else right? The reason I ask is because I noticed your quote changes for the strings and in some languages... |
4,162 | 582 | 2008-08-07T00:19:03Z | 3,976 | 4 | <p><code>/dev/cu.xxxxx</code> is the "callout" device, it's what you use when you establish a connection to the serial device and start talking to it. <code>/dev/tty.xxxxx</code> is the "dialin" device, used for monitoring a port for incoming calls for e.g. a fax listener.</p> |
4,958 | 613 | 2008-08-07T16:50:43Z | 4,942 | 2 | <p>Focus on the shorter time needed for development/prototype and possibly easier maintenance (none of this may apply against Ruby).</p> |
4,978 | 676 | 2008-08-07T17:04:25Z | 4,942 | 11 | <p>This is one of those cases that really boil down to personal preference or situational details. If you're more comfortable and experienced with Python, then say so. Are they asking you to justify it because they're more comfortable with one of the other environments? After you're done, will the system be passed off ... |
5,014 | 660 | 2008-08-07T17:30:10Z | 4,942 | 3 | <p>I would consider that using python on a new project is completely dependent on what problem you are trying to solve with python. If you want someone to agree with you that you should use python, then show them how python's features apply specifically to that problem.</p>
<p>In the case of web development with py... |
5,129 | 680 | 2008-08-07T18:40:53Z | 5,102 | 12 | <p>There are two main ways of running Python on Apache. The simplest would be to use CGI and write normal Python scripts while the second is using a web framework like Django or Pylons.</p>
<p>Using CGI is straightforward. Make sure your Apache config file has a cgi-bin set up. If not, follow their documentation (<a h... |
5,165 | 116 | 2008-08-07T19:02:57Z | 5,102 | 8 | <p>Yes, mod_python is pretty confusing to set up. Here's how I did it.</p>
<p>In httpd.conf:</p>
<pre><code>LoadModule python_module modules/mod_python.so<br><br><Directory "/serverbase/htdocs/myapp"><br> AddHandler mod_python .py<br> PythonHandler myapp<br> PythonDebug On<br></code></pre>
<p>and in ... |
5,168 | 636 | 2008-08-07T19:05:58Z | 5,102 | 5 | <p>Are you running Python on UNIX or Windows?</p>
<p>An alternative to mod_python and FastCGI is mod_wsgi. You can find out more at <a href="http://code.google.com/p/modwsgi/" rel="nofollow">modwsgi</a></p>
<p>I have built and installed this on Solaris without problems. I had previously tried mod_python but ran into ... |
5,319 | 380 | 2008-08-07T21:10:27Z | 5,313 | 8 | <p>erm.. HTML? (trying to be funny here... while we wait for real answers..)</p> |
5,320 | 216 | 2008-08-07T21:11:28Z | 5,313 | 1 | <p>The <a href="http://www.wxwidgets.org/" rel="nofollow" title="wxWidgets">wxWidgets</a> (formerly known as wxWindows) library might be what you're looking for. There's a particularly good port for Python, <a href="http://wxpython.org/" rel="nofollow" title="wxPython">wxPython</a>, as well as versions for different la... |
5,340 | 108 | 2008-08-07T21:24:26Z | 5,313 | 3 | <P>Not sure if this is what you're looking for, but there's <A href="http://glade.gnome.org/" rel="nofollow">Glade</A> (or <A href="http://gladewin32.sourceforge.net/" rel="nofollow">Windows download</A>) which is a designer for GTK+. It generates an XML file which can then be used to build the GUI in a number of diffe... |
5,343 | 25 | 2008-08-07T21:25:26Z | 5,313 | 5 | <p><a href="http://en.wikipedia.org/wiki/Qt_%28toolkit%29">Qt</a> (pronounced "cute" by its creators[1]) is a cross-platform application development framework, widely used for the development of GUI programs.</p>
<p>Qt uses <strong>C++</strong> with several non-standard extensions implemented by an additional pre-pr... |
5,430 | 267 | 2008-08-07T22:32:23Z | 5,419 | 24 | <p><strong>Note:</strong> This answer is sort of outdated (from 2008). Please use the solution below with care!!</p>
<hr>
<p>Here is a page that details the problem and a solution (search the page for the text <em>Wrapping sys.stdout into an instance</em>):</p>
<p><a href="http://wiki.python.org/moin/PrintFails">Pri... |
5,435 | 429 | 2008-08-07T22:35:48Z | 5,415 | 13 | <p>You'll want the <a href="https://docs.python.org/3.4/library/struct.html" rel="nofollow">struct</a> package.</p>
|
6,125 | 309,844 | 2008-08-08T16:45:50Z | 5,966 | 3 | <p>Why not use SQLite? There is good support in Python and you can write SQL queries to get the data out. Here is the Python docs for <a href="http://docs.python.org/lib/module-sqlite3.html" rel="nofollow">sqlite3</a></p>
<hr>
<p>If you don't want to use SQLite you could do an array of dicts.</p>
<pre><code>ep... |
6,161 | 758 | 2008-08-08T17:12:24Z | 1,734 | 10 | <p>Protocol buffers are intended to optimize communications between machines. They are really not intended for human interaction. Also, the format is binary, so it could not replace XML in that use case. </p>
<p>I would also recommend <a href="http://en.wikipedia.org/wiki/JSON">JSON</a> as being the most compact tex... |
6,616 | 488 | 2008-08-09T04:44:41Z | 5,313 | 3 | <p><a href="http://www.mozilla.org/projects/xul/" rel="nofollow">XML User Interface Language</a>. Don't know much about it so not sure if it meets your desires. Post back with your experience if you play with it.</p> |
6,805 | 358 | 2008-08-09T15:13:14Z | 5,966 | 0 | <P>I have done something similar in the past and used an in-memory XML document as a quick and dirty hierachical database for storage. You can store each show/season/episode as an element (nested appropriately) and attributes of these things as xml attributes on the elements. Then you can use XQuery to get info back ou... |
7,073 | 878 | 2008-08-10T07:10:19Z | 502 | 2 | <p>Is the PC likely to have Acrobat installed? I think Acrobat installs a shell extension so previews of the first page of a PDF document appear in Windows Explorer's thumbnail view. You can get thumbnails yourself via the IExtractImage COM API, which you'll need to wrap. <a href="http://www.vbaccelerator.com/home/net/... |
7,090 | 13 | 2008-08-10T08:08:33Z | 502 | 25 | <p>ImageMagick delegates the PDF->bitmap conversion to GhostScript anyway, so here's a command you can use (it's based on the actual command listed by the <code>ps:alpha</code> delegate in ImageMagick, just adjusted to use JPEG as output):</p>
<pre><code>gs -q -dQUIET -dPARANOIDSAFER -dBATCH -dNOPAUSE -dNOPROMPT \
-dM... |
7,286 | 207 | 2008-08-10T18:45:32Z | 773 | 394 | <p>As Sebastjan said, <strong>you first have to sort your data. This is important.</strong></p>
<p>The part I didn't get is that in the example construction</p>
<pre><code>groups = []
uniquekeys = []
for k, g in groupby(data, keyfunc):
groups.append(list(g)) # Store group iterator as a list
uniquekeys.append... |
7,496 | 680 | 2008-08-11T03:11:55Z | 5,313 | 0 | <p>I read a little on XML User Interface Language (XUL) and it looks really robust and well supported. The main problem for me is it's tied to the Gecko rendering engine so it's cross platform the way wxWidgets, QT and GTK+ are cross platform. Also, there Python bindings don't seem as good as those other libraries.</p>... |
8,020 | 985 | 2008-08-11T17:58:28Z | 5,419 | -1 | <p>The cause of your problem is <strong>NOT</strong> the Win console not willing to accept Unicode (as it does this since I guess Win2k by default). It is the default system encoding. Try this code and see what it gives you:</p>
<pre><code>import sys
sys.getdefaultencoding()
</code></pre>
<p>if it says ascii, there's... |
8,109 | 1,026 | 2008-08-11T19:17:41Z | 5,313 | 1 | <p>@Cristian and Antony Cramp: while XUL is a nice choice for UI development (cross-platform, open-source licensed, used in Firefox and other major software), it's certainly not language agnostic. You're tied to Gecko, with JS for scripting. There is experimental support for Python scripting, but it's only experimental... |
8,114 | 872 | 2008-08-11T19:21:14Z | 5,313 | 4 | <p>I seriously doubt you're going to find a markup language for GIU's that's <em>not</em> tied to a specific library. For such a thing to exist, there would need to be a standardized GUI markup language, with several implementations.</p>
|
8,165 | 985 | 2008-08-11T20:07:59Z | 5,966 | 0 | <p>I don't get this part here:</p>
<blockquote>
<p>This worked okay, but there was no easy way of checking if x[3][24] was supposed to exist or not (so I couldn't raise the season<em>not</em>found exception)</p>
</blockquote>
<p>There is a way to do it - called <strong>in</strong>:</p>
<pre><code>>>>x={}
... |
8,332 | 1,057 | 2008-08-11T23:16:33Z | 766 | 4 | <p>You could try setting up your own python installation using <a href="http://peak.telecommunity.com/DevCenter/EasyInstall#creating-a-virtual-python" rel="nofollow">Virtual Python</a>. Check out how to setup Django using it <a href="http://forums.site5.com/showthread.php?t=10236" rel="nofollow">here</a>. That was wr... |
8,699 | 207 | 2008-08-12T11:40:13Z | 8,692 | 74 | <p>The <a href="http://lxml.de/">lxml package</a> supports xpath. It seems to work pretty well, although I've had some trouble with the self:: axis. There's also <a href="http://pypi.python.org/pypi/Amara/1.1.6">Amara</a>, but I haven't used it personally.</p>
|
8,972 | 722 | 2008-08-12T15:32:05Z | 8,948 | 1 | <p><a href="http://www.dotfunk.com/projects/mp3/" rel="nofollow">This toolkit</a> may do what you need. I can't say if it's the "best", but really, if it does what you need, that's all that matters, right?</p>
<p>HTH</p>
|
8,974 | 394 | 2008-08-12T15:37:24Z | 8,948 | 6 | <p>A simple example from the book Dive Into Python works ok for me, <a href="http://www.diveintopython.org/download/diveintopython-examples-5.4.zip" rel="nofollow">this</a> is the download link, the example is fileinfo.py. Don't know if it's the best, but it can do the basic job.</p>
<p>The entire book is available on... |
8,976 | 1,087 | 2008-08-12T15:37:59Z | 8,948 | 1 | <p>It can depend on exactly what you want to do in addition to reading the metadata. If it is just simply the bitrate / name etc. that you need, and nothing else, something lightweight is probably best.</p>
<p>If you're manipulating the mp3 past that PyMedia may be suitable.</p>
<p>There are quite a few, whatever you... |
9,080 | 745 | 2008-08-12T17:55:22Z | 5,966 | 0 | <p>Bartosz/To clarify "This worked okay, but there was no easy way of checking if x[3][24] was supposed to exist or not"</p>
<p><code>x['some show'][3][24]</code> would return season 3, episode 24 of "some show". If there was no season 3, I want the pseudo-dict to raise tvdb<em>seasonnotfound, if "some show" doesn't e... |
9,171 | 1,146 | 2008-08-12T19:34:44Z | 8,692 | 2 | <p><a href="http://pyxml.sourceforge.net" rel="nofollow" title="PyXML">PyXML</a> works well. </p>
<p>You didn't say what platform you're using, however if you're on Ubuntu you can get it with <code>sudo apt-get install python-xml</code>. I'm sure other Linux distros have it as well. </p>
<p>If you're on a Mac, xpa... |
9,358 | 1,057 | 2008-08-13T00:44:26Z | 8,948 | 11 | <p>What you're after is the <a href="http://id3-py.sourceforge.net/">ID3</a> module. It's very simple and will give you exactly what you need. Just copy the ID3.py file into your site-packages directory and you'll be able to do something like the following:</p>
<pre><code>from ID3 import *
try:
id3info = ID3('file... |
10,129 | 116 | 2008-08-13T17:56:34Z | 10,123 | 10 | <p>This will do what you want:</p>
<pre><code>signum = status & 0xff
exitstatus = (status & 0xff00) >> 8
</code></pre>
|
10,132 | 872 | 2008-08-13T17:58:27Z | 10,123 | 1 | <p>You can unpack the status using <a href="http://docs.python.org/ref/shifting.html" rel="nofollow">bit-shifting</a> and <a href="http://docs.python.org/ref/bitwise.html" rel="nofollow">masking</a> operators.</p>
<pre><code>low = status & 0x00FF
high = (status & 0xFF00) >> 8
</code></pre>
<p>I'm not a ... |
10,148 | 429 | 2008-08-13T18:14:10Z | 10,123 | 0 | <p>The folks before me've nailed it, but if you really want it on one line, you can do this:</p>
<pre><code>(signum, exitstatus) = (status & 0xFF, (status >> 8) & 0xFF)
</code></pre>
<p>EDIT: Had it backwards.</p>
|
10,213 | 99 | 2008-08-13T18:52:36Z | 10,123 | 10 | <p>To answer your general question, you can use <a href="http://en.wikipedia.org/wiki/Bit_twiddling" rel="nofollow">bit manipulation</a> techniques:</p>
<pre><code>pid, status = os.wait()
exitstatus, signum = status & 0xFF, (status & 0xFF00) >> 8
</code></pre>
<p>However, there are also <a href="http://... |
10,778 | 985 | 2008-08-14T07:08:19Z | 5,966 | 5 | <p>OK, what you need is <code>classobj</code> from new module. That would allow you to construct exception classes dynamically (<code>classobj</code> takes a string as an argument for the class name). </p>
<pre><code>import new
myexc=new.classobj("ExcName",(Exception,),{})
i=myexc("This is the exc msg!")
raise i
</cod... |
10,845 | 912 | 2008-08-14T09:46:21Z | 8,948 | 25 | <p>I've used <a href="https://bitbucket.org/lazka/mutagen">mutagen</a> to edit tags in media files before. The nice thing about mutagen is that it can handle other formats, such as mp4, FLAC etc. I've written several scripts with a lot of success using this API.</p>
|
10,846 | 912 | 2008-08-14T09:48:59Z | 8,692 | 7 | <p>The latest version of <a href="http://effbot.org/zone/element-xpath.htm">elementtree</a> supports XPath pretty well. Not being an XPath expert I can't say for sure if the implementation is full but it has satisfied most of my needs when working in Python. I've also use lxml and PyXML and I find etree nice because ... |
11,074 | 267 | 2008-08-14T14:04:25Z | 11,060 | 8 | <p>I started writing up a summary of my experience with my own code generator, then went back and re-read your question and found you had already touched upon the same issues yourself, focus on the execution results instead of the code layout/look.</p>
<p>Problem is, this is hard to test, the generated code might not ... |
11,128 | 414 | 2008-08-14T14:38:19Z | 11,060 | 0 | <p>Yes, results are the ONLY thing that matters. The real chore is writing a framework that allows your generated code to run independently... spend your time there.</p>
|
11,235 | 1,343 | 2008-08-14T15:46:01Z | 11,060 | 0 | <p>If you are running on *nux you might consider dumping the unittest framework in favor of a bash script or makefile. on windows you might consider building a shell app/function that runs the generator and then uses the code (as another process) and unittest that.</p>
<p>A third option would be to generate the code a... |
11,443 | 825 | 2008-08-14T18:15:42Z | 11,060 | 4 | <p>Recall that "unit testing" is only one kind of testing. You should be able to unit test the <strong>internal</strong> pieces of your code generator. What you're really looking at here is system level testing (a.k.a. regression testing). It's not just semantics... there are different mindsets, approaches, expectat... |
12,166 | 995 | 2008-08-15T11:56:02Z | 2,933 | 13 | <p>An alternative tool to py2exe is <a href="http://pypi.python.org/pypi/bbfreeze/">bbfreeze</a> which generates executables for windows and linux. It's newer than py2exe and handles eggs quite well. I've found it magically works better without configuration for a wide variety of applications.</p>
|
12,167 | 1,344 | 2008-08-15T12:00:37Z | 2,933 | 2 | <p>I'm not sure that this is the best way to do it, but when I'm deploying Ruby GUI apps (not Python, but has the same "problem" as far as .exe's are concerned) on Windows, I just write a short launcher in C# that calls on my main script. It compiles to an executable, and I then have an application executable.</p>
|
12,609 | 1,448 | 2008-08-15T19:04:13Z | 12,592 | 45 | <p>Yes. You can do it. The <a href="https://docs.python.org/3/library/doctest.html">doctest module documentation</a> and Wikipedia has an <a href="http://en.wikipedia.org/wiki/Doctest#Example_2%3a_doctests_embedded_in_a_README.txt_file">example</a> of it.</p>
<pre><code> >>> x
Traceback (most recent call... |
13,040 | 995 | 2008-08-16T07:57:53Z | 12,591 | 1 | <p>Can you give an example? According to the <a href="http://codespeak.net/lxml/validation.html" rel="nofollow">lxml validation docs</a>, lxml can handle DTD validation (specified in the XML doc or externally in code) and system catalogs, which covers most cases I can think of.</p>
<pre><code>f = StringIO("<!ELEMEN... |
13,107 | 1,531 | 2008-08-16T12:35:36Z | 1,476 | 204 | <p>For reference—<em>future</em> Python possibilities:<br />
Starting with Python 2.6 you can express binary literals using the prefix <strong>0b</strong> or <strong>0B</strong>:</p>
<pre><code>>>> 0b101111
47
</code></pre>
<p>You can also use the new <strong>bin</strong> function to get the binary rep... |
13,399 | 242,853 | 2008-08-16T22:37:06Z | 13,396 | 0 | <p>Depends on the language and what you need to do, a "map" as it's called in many languages could be what you're looking for. I don't know C#, but according to <a href="http://blogs.msdn.com/devdev/archive/2006/06/30/652802.aspx" rel="nofollow">this</a> page, .NET 2.0 calls map "ConvertAll".</p>
<p>The meaning of "ma... |
13,403 | 1,190 | 2008-08-16T22:47:53Z | 13,396 | 1 | <p>in Ruby:</p>
<pre><code>intArray.select { |x| x > 3 }.each do |x|
# do other processing
end
</code></pre>
<p>or if "other processing" is a short one-liner:</p>
<pre><code>intArray.select { |x| x > 3 }.each { |x| something_that_uses x }
</code></pre>
<p>lastly, if you want to return a new array containing... |
13,405 | 429 | 2008-08-16T22:56:30Z | 13,396 | 2 | <p>In Python, you have <a href="http://docs.python.org/tut/node7.html#SECTION007130000000000000000" rel="nofollow" title="Human Interface Guidelines">filter and map</a>, which can so what you want:</p>
<pre><code>map(lambda x: foo(x + 1) filter(lambda x: x > 3, intArray))
</code></pre>
<p>There's also <a href="htt... |
13,406 | 960 | 2008-08-16T23:06:52Z | 13,396 | 3 | <p>In C# you can apply selective processing on anything that lives inside an IEnumerable like this: </p>
<pre><code>intArray.Where(i => i > 3).ConvertAll();
DoStuff(intArray.Where(i => i 3));
</code></pre>
<p>Etc..</p>
|
13,435 | 891 | 2008-08-17T00:44:57Z | 13,396 | 4 | <p>The increment in the original <code>foreach</code> loop will not affect the contents of the array, the only way to do this remains a <code>for</code> loop:</p>
<pre><code>for(int i = 0; i < intArray.Length; ++i)
{
if(intArray[i] > 3) ++intArray[i];
}
</code></pre>
<p>Linq is not intended to modify existi... |
13,456 | 1,554 | 2008-08-17T01:26:52Z | 13,454 | 0 | <p>You can obviously concatenate everything together:</p>
<pre><code>cleaned = stringwithslashes.replace("\\n","\n").replace("\\r","\n").replace("\\","")
</code></pre>
<p>Is that what you were after? Or were you hoping for something more terse?</p>
|
13,579 | 1,370 | 2008-08-17T10:28:00Z | 13,454 | -4 | <p>Python has a built-in escape() function analogous to PHP's addslashes, but no unescape() function (stripslashes), which in my mind is kind of ridiculous.</p>
<p>Regular expressions to the rescue (code not tested):</p>
<pre><code>p = re.compile( '\\(\\\S)')
p.sub('\1',escapedstring)
</code></pre>
<p>In theory that... |
13,598 | 745 | 2008-08-17T12:15:13Z | 13,454 | 10 | <p>Not totally sure this is what you want, but..</p>
<pre><code>cleaned = stringwithslashes.decode('string_escape')
</code></pre>
|
13,608 | 893 | 2008-08-17T12:55:25Z | 13,454 | 2 | <p>It sounds like what you want could be reasonably efficiently handled through regular expressions:</p>
<pre><code>import re
def stripslashes(s):
r = re.sub(r"\\(n|r)", "\n", s)
r = re.sub(r"\\", "", r)
return r
cleaned = stripslashes(stringwithslashes)
</code></pre>
|
13,844 | 1,421 | 2008-08-17T19:01:02Z | 13,791 | 3 | <p>Well, I think you might have missed the r or miscounted the backslashes...</p>
<pre><code>"\\n" == r"\n"
>>> import re
>>> mystring = r"This is \\n a test \\r"
>>> p = re.compile( r"[\\][\\](.)" )
>>> print p.sub( r"\\\1", mystring )
This is \n a test \r
>>>
</code></pr... |
13,869 | 893 | 2008-08-17T19:26:33Z | 13,791 | 0 | <p>You are being tricked by Python's representation of the result string. The Python expression:</p>
<pre><code>'This is \\n a test \\r'
</code></pre>
<p>represents the string</p>
<pre><code>This is \n a test \r
</code></pre>
<p>which is I think what you wanted. Try adding 'print' in front of each of your p.sub() c... |
13,875 | 1,421 | 2008-08-17T19:32:33Z | 13,857 | 37 | <p>It's simple: A function that references variables from a containing scope, potentially after flow-of-control has left that scope. That last bit is very useful:</p>
<pre><code>>>> def makeConstantAdder(x):
... constant = x
... def adder(y):
... return y + constant
... return adder
...
&... |
13,882 | 1,370 | 2008-08-17T19:40:49Z | 13,791 | 0 | <p>The idea is that I'll read in an escaped string, and unescape it (a feature notably lacking from Python, which you shouldn't need to resort to regular expressions for in the first place). Unfortunately I'm not being tricked by the backslashes...</p>
<p>Another illustrative example:</p>
<pre><code>>>> myst... |
13,902 | 1,659 | 2008-08-17T20:20:20Z | 13,857 | 6 | <p>I've never heard of transactions being used in the same context as explaining what a closure is and there really aren't any transaction semantics here.</p>
<p>It's called a closure because it "closes over" the outside variable (constant)--i.e., it's not just a function but an enclosure of the environment where the ... |
13,906 | 150 | 2008-08-17T20:25:18Z | 13,857 | 13 | <p>I like <a href="http://effbot.org/zone/closure.htm">this rough, succinct definition</a>:</p>
<blockquote>
<p>A function that can refer to environments that are no longer active.</p>
</blockquote>
<p>I'd add</p>
<blockquote>
<p>A closure allows you to bind variables into a function <em>without passing them as ... |
13,943 | 1,472 | 2008-08-17T21:36:32Z | 13,791 | 7 | <p>Isn't that what <a href="#13844">Anders' second example</a> does?</p>
<p>In 2.5 there's also a <code>string-escape</code> encoding you can apply:</p>
<pre><code>>>> mystring = r"This is \n a test \r"
>>> mystring.decode('string-escape')
'This is \n a test \r'
>>> print mystring.decode('s... |
13,949 | 1,667 | 2008-08-17T21:46:02Z | 13,941 | 47 | <p>Have you tried :</p>
<pre><code>import sys
sys.stdout.write('\a')
sys.stdout.flush()
</code></pre>
<p>That works for me here on Mac OS 10.5</p>
<p>Actually, I think your original attempt works also with a little modification:</p>
<pre><code>print('\a')
</code></pre>
<p>(You just need the single quotes around th... |
13,958 | 1,370 | 2008-08-17T21:55:54Z | 13,791 | 0 | <p>Mark; his second example requires every escaped character thrown into an array initially, which generates a KeyError if the escape sequence happens not to be in the array. It will die on anything but the three characters provided (give \v a try), and enumerating every possible escape sequence every time you want to ... |
13,959 | 1,472 | 2008-08-17T21:56:10Z | 13,941 | 4 | <p>I had to turn off the "Silence terminal bell" option in my active Terminal Profile in iTerm for <code>print('\a')</code> to work. It seemed to work fine by default in Terminal.</p>
<p>You can also use the Mac module <code>Carbon.Snd</code> to play the system beep:</p>
<pre><code>>>> import Carbon.Snd
>... |
14,304 | 242,853 | 2008-08-18T08:06:30Z | 14,281 | 0 | <p>You could loop through the zip files, reading individual files using the zipfile module and running your regex on those, eliminating to unzip all the files at once. </p>
<p>I'm fairly certain that you can't run a regex over the zipped data, at least not meaningfully.</p>
|
14,314 | 1,404 | 2008-08-18T08:10:57Z | 14,281 | 0 | <p>To access the contents of a zip file you have to unzip it, although the zipfile package makes this fairly easy, as you can unzip each file within an archive individually.</p>
<p><a href="http://docs.python.org/lib/module-zipfile.html" rel="nofollow">Python zipfile module</a></p>
|
14,320 | 116 | 2008-08-18T08:19:06Z | 14,281 | 8 | <p>There's nothing that will automatically do what you want.</p>
<p>However, there is a python zipfile module that will make this easy to do. Here's how to iterate over the lines in the file.</p>
<pre><code>#!/usr/bin/python
import zipfile
f = zipfile.ZipFile('myfile.zip')
for subfile in f.namelist():
print su... |
15,261 | 1,813 | 2008-08-18T21:35:39Z | 8,154 | 2 | <p>You might want to check MySQL's timeout variables:</p>
<pre><code>show variables like '%timeout%';
</code></pre>
<p>You're probably interested in <code>wait_timeout</code> (less likely but possible: <code>interactive_timeout</code>). On Debian and Ubuntu, the defaults are 28800 (MySQL kills connections after 8 ho... |
15,291 | 1,797 | 2008-08-18T22:06:02Z | 4,942 | 0 | <p>I agree with mreggen. Tell them by working in Python you can get things done faster. Getting things done faster possibly means money saved by the client. In the least it means that you are working with a language you a more comfortable in, meaning faster development, debugging, and refactoring time. There will be le... |
15,296 | 1,199,387 | 2008-08-18T22:10:13Z | 4,942 | 4 | <p>It's one of the preferred languages over at Google - It's several years ahead of Ruby in terms of "maturity" (what ever that really means - but managers like that). Since it's prefered by Google you can also run it on the Google App Engine.</p>
<p>Mircosoft is also embracing Python, and will have a v2.0 of IronPyth... |
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