With PyCharm 5.0 we finally got to select [Google and NumPy Style Python Docstrings][1] templates. 

It is also mentioned in the [whatsnew][2] section for PyCharm 5.0.

How to change the Docstring Format:

&gt; File --&gt; Settings --&gt; Tools --&gt; Python Integrated Tools

There you can choose from the available Docstrings formats: 

&gt; Plain, Epytext, reStructuredText, NumPy, Google

  [1]: https://www.jetbrains.com/pycharm/help/python-integrated-tools.html
  [2]: https://www.jetbrains.com/pycharm/whatsnew/ &quot;whatsnew&quot;

As pointed out by jstol: for Mac users, this is under 
&gt; PyCharm -&gt; Preferences -&gt; Tools -&gt; Python Integrated Tools.

As CrazyCoder mentions, its a [ticket][1]. Right now, you can only use `EpyType` and `reStructuredText`.


  [1]: http://youtrack.jetbrains.com/issue/PY-9795

Just to be make @Nras answer explicit, as of [PyCharm 5.0](https://www.jetbrains.com/pycharm/help/python-integrated-tools.html):

&gt; File &gt; Settings &gt; Tools &gt; Python Integrated Tools &gt; Docstrings  &gt;
&gt; Google

I have the following url:
          
url = http://photographs.500px.com/kyle/09-09-201315-47-571378756077.jpg

I would like to extract the file name in this url: 09-09-201315-47-571378756077.jpg

Once I get this file name, I&#39;m going to save it with this name to the Desktop.

    filename = **extracted file name from the url**     
    download_photo = urllib.urlretrieve(url, &quot;/home/ubuntu/Desktop/%s.jpg&quot; % (filename))

After this, I&#39;m going to resize the photo, once that is done, I&#39;ve going to save the resized  version and append the word &quot;_small&quot; to the end of the filename.
    
    downloadedphoto = Image.open(&quot;/home/ubuntu/Desktop/%s.jpg&quot; % (filename))               
    resize_downloadedphoto = downloadedphoto.resize.((300, 300), Image.ANTIALIAS)
    resize_downloadedphoto.save(&quot;/home/ubuntu/Desktop/%s.jpg&quot; % (filename + _small))

From this, what I am trying to achieve is to get two files, the original photo with the original name, then the resized photo with the modified name. Like so:

09-09-201315-47-571378756077.jpg

09-09-201315-47-571378756077_small.jpg

How can I go about doing this?

How to extract a filename from a URL &amp; append a word to it?

It seems that a vector will check if the move constructor is labeled as noexcept before deciding on whether to move or copy elements when reallocating. Is the default move constructor defined as noexcept? I saw the following documentation but it didn&#39;t specify this.[http://en.cppreference.com/w/cpp/language/move_constructor][1]

&gt; Implicitly-declared move constructor 
&gt; 
&gt; If no user-defined move
&gt; constructors are provided for a class type (struct, class, or union),
&gt; and all of the following is true: there are no user-declared copy
&gt; constructors there are no user-declared copy assignment operators
&gt; there are no user-declared move assignment operators there are no
&gt; user-declared destructors the implicitly-declared move constructor is
&gt; not defined as deleted due to conditions detailed in the next section
&gt; then the compiler will declare a move constructor as an inline public
&gt; member of its class with the signature T::T(T&amp;&amp;) A class can have
&gt; multiple move constructors, e.g. both T::T(const T&amp;&amp;) and T::T(T&amp;&amp;).
&gt; If some user-defined move constructors are present, the user may still
&gt; force the generation of the implicitly declared move constructor with
&gt; the keyword default.


  [1]: http://en.cppreference.com/w/cpp/language/move_constructor

Is the default Move constructor defined as noexcept?

Does PyCharm 2.7 (or will PyCharm 3) have support for custom docstring and doctest stubs?  If so, how does one go about writing this specific type of custom extension?

My current project has standardized on using the Google Python Style Guide (http://google-styleguide.googlecode.com/svn/trunk/pyguide.html).  I love PyCharm&#39;s docstring support, but it&#39;s only two supported formats right now are epytext and reStructureText.  I want, and am willing to write myself, a PyCharm plugin that creates a documentation comment stub formatted in either Google or Numpydoc style (https://pypi.python.org/pypi/sphinxcontrib-napoleon/). Of special importance here is incorporating the type inference abilities that PyCharm has with the other two documentation types.

Custom PyCharm docstring stubs (i.e. for google docstring or numpydoc formats)

<p>Does PyCharm 2.7 (or will PyCharm 3) have support for custom docstring and doctest stubs?  If so, how does one go about writing this specific type of custom extension?</p>
<p>My current project has standardized on using the Google Python Style Guide (<a href="http://google-styleguide.googlecode.com/svn/trunk/pyguide.html" target="_blank" rel="noopener noreferrer">http://google-styleguide.googlecode.com/svn/trunk/pyguide.html</a>).  I love PyCharm's docstring support, but it's only two supported formats right now are epytext and reStructureText.  I want, and am willing to write myself, a PyCharm plugin that creates a documentation comment stub formatted in either Google or Numpydoc style (<a href="https://pypi.python.org/pypi/sphinxcontrib-napoleon/" target="_blank" rel="noopener noreferrer">https://pypi.python.org/pypi/sphinxcontrib-napoleon/</a>). Of special importance here is incorporating the type inference abilities that PyCharm has with the other two documentation types.</p>


I&#39;m trying to check if a string only contains letters, not digits or symbols.

For example:

    &gt;&gt;&gt; only_letters(&quot;hello&quot;)
    True
    &gt;&gt;&gt; only_letters(&quot;he7lo&quot;)
    False



How can I check if a string only contains letters in Python?

I would like to set

    sys.argv

so I can unit test passing in different combinations.  The following doesn&#39;t work:

    #!/usr/bin/env python
    import argparse, sys
    def test_parse_args():
        global sys.argv
        sys.argv = [&quot;prog&quot;, &quot;-f&quot;, &quot;/home/fenton/project/setup.py&quot;]
        setup = get_setup_file()
        assert setup == &quot;/home/fenton/project/setup.py&quot;
    def get_setup_file():
        parser = argparse.ArgumentParser()
        parser.add_argument(&#39;-f&#39;)
        args = parser.parse_args()
        return args.file
    if __name__ == &#39;__main__&#39;:
        test_parse_args()


Then running the file:

    pscripts % ./test.py                                                                                           
      File &quot;./test.py&quot;, line 4
        global sys.argv
                  ^
    SyntaxError: invalid syntax
    pscripts %  

How do I set sys.argv so I can unit test it?

I need to be able to switch back and forth between Python 2 and 3. How do I do that using Homebrew as I don&#39;t want to mess with path and get into trouble.
Right now I have 2.7 installed through Homebrew.

How can I use Homebrew to install both Python 2 and 3 on Mac?

I was experimenting with the new shiny [concurrent.futures][1] module introduced in Python 3.2, and I&#39;ve noticed that, almost with identical code, using the Pool from concurrent.futures is *way* slower than using [multiprocessing.Pool][2].

This is the version using multiprocessing:


    def hard_work(n):
        # Real hard work here
        pass

    if __name__ == &#39;__main__&#39;:
        from multiprocessing import Pool, cpu_count
    
        try:
            workers = cpu_count()
        except NotImplementedError:
            workers = 1
        pool = Pool(processes=workers)
        result = pool.map(hard_work, range(100, 1000000))


And this is using concurrent.futures:



    def hard_work(n):
        # Real hard work here
        pass

    if __name__ == &#39;__main__&#39;:
        from concurrent.futures import ProcessPoolExecutor, wait
        from multiprocessing import cpu_count
        try:
            workers = cpu_count()
        except NotImplementedError:
            workers = 1
        pool = ProcessPoolExecutor(max_workers=workers)
        result = pool.map(hard_work, range(100, 1000000))


Using a na&#239;ve factorization function taken from this [Eli Bendersky article][3], these are the results on my computer (i7, 64-bit, Arch Linux):

    [juanlu@nebulae]─[~/Development/Python/test]
    └[10:31:10] $ time python pool_multiprocessing.py 
    
    real	0m10.330s
    user	1m13.430s
    sys	0m0.260s
    [juanlu@nebulae]─[~/Development/Python/test]
    └[10:31:29] $ time python pool_futures.py 
    
    real	4m3.939s
    user	6m33.297s
    sys	0m54.853s


I cannot profile these with the Python profiler because I get pickle errors. Any ideas?

  [1]: http://docs.python.org/3.3/library/concurrent.futures.html
  [2]: http://docs.python.org/3.3/library/multiprocessing.html#multiprocessing.pool.Pool
  [3]: http://eli.thegreenplace.net/2013/01/16/python-paralellizing-cpu-bound-tasks-with-concurrent-futures/

ProcessPoolExecutor from concurrent.futures way slower than multiprocessing.Pool

Can I insert a column at a specific column index in pandas? 

    import pandas as pd
    df = pd.DataFrame({&#39;l&#39;:[&#39;a&#39;,&#39;b&#39;,&#39;c&#39;,&#39;d&#39;], &#39;v&#39;:[1,2,1,2]})
    df[&#39;n&#39;] = 0

This will put column `n` as the last column of `df`, but isn&#39;t there a way to tell `df` to put `n` at the beginning?

how do I insert a column at a specific column index in pandas?

I am new to PyCharm. I have been using IDLE for a long time. 

It is very convenient to use Python objects after script execution in IDLE. Is there any way to use script objects after its execution with interactive python shell using PyCharm?

For example, we have a &#39;test&#39; project with one file &#39;test.py&#39;:

    a = &#39;123&#39;
    print a

after execution we can get the result:

    123
    Process finished with exit code 0

How can I use string &#39;a&#39; with interactive shell?

Added after 8 years. My pycharm tutorial in russian: https://youtu.be/-RzKJlLXw54

interactive shell debugging with pycharm

I&#39;m trying to learn Python and decided to use PyCharm.  When I try to start a new project I get a dialog that says &quot;No Python interpreter selected&quot;.  It has a drop down to select a interpreter, but the drop down is empty.

Trying to get PyCharm to work, keep getting &quot;No Python interpreter selected&quot;

I installed pycharm normally via `bin/pycharm.sh`, but the mistake I made was doing `bash pycharm.sh` _while_ the pycharm directory has inside the Downloads folder.

I later on moved the directory to `/opt/Pycharm/`. This is causing the once functioning unity launcher (which was added when PyCharm was initially installed) to fail every time I attempt to use it (as expected).

How can I re-add `pycharm.sh` as a lauchable app from the unity launcher? I know the location of the `pycharm.sh` file. I&#39;ve tried to add it to `/usr/bin/` but that does not change anything.

I can still launch pycharm via `bash /usr/opt/Pycharm/bin/Pycharm.sh`. But this is tedious.

UPDATE
------
I have tried making a new `.desktop` file for pycharm, using the following script:

    [Desktop Entry]
    Encoding=UTF-8
    Name=PyCharm
    Exec=/opt/Pycharm-3.0.1/bin/pycharm.sh
    Icon=/opt/Pycharm-3.0.1/bin/PyCharm_32.png
    Type=Application
    Categories=Development;
    StartupWMClass=PyCharm

However, I get a &quot;Unable to save Pycharm.desktop&quot; error when I try to save the file inside `/usr/share/applications/pycharm.desktop`. Any help regarding this would be deeply appreciated.

Recreating PyCharm launcher in Ubuntu

In _PyCharm_, I&#39;ve added the Python environment `/usr/bin/python`. However,

    from gnuradio import gr

fails as an _undefined reference_. However, it works fine in the Python interpreter from the command line. 

GNURadio works fine with python outside of Pycharm. Everything is installed and configured how I want it.

Gnuradio is located at `/usr/local/lib/python2.7/site-packages/gnuradio`

Also:
&gt; PYTHONPATH=/usr/local/lib/python2.7/site-packages:/usr/local/lib/python2.7/site-packages/gnuradio

How do I use installed packages in PyCharm?

In general, I&#39;d like to know the keyboard shortcut for navigating to multiple sections like the project structure, editor, console. I&#39;m using eclipse keymap configuration in pycharm. I used to switch between different views in eclipse using [&lt;kbd&gt;Ctrl&lt;/kbd&gt; + &lt;kbd&gt;F7&lt;/kbd&gt;]. But that is not working in pycharm.

I also used to use &lt;kbd&gt;F12&lt;/kbd&gt; to bring the focus back to the editor when the focus is on any other view. That is also not working in pycharm.

Environment: Ubuntu 12.04 64bit.

Keyboard shortcut to switch between python console and the editor in pycharm

So, reStructuredText is
[the recommended way](https://www.python.org/dev/peps/pep-0287) for Python code
documentation, if you try hard enough, you can
[find in the sphinx documentation](http://www.sphinx-doc.org/en/master/usage/restructuredtext/domains.html#python-signatures)
how to normalize your function signature documentation. All given examples are
single-line, but what if a parameter description is multi-line like the following
?

    def f(a, b):
        &quot;&quot;&quot; Does something with a and b

        :param a: something simple
        :param b: well, it&#39;s not something simple, so it may require more than eighty
                  chars
        &quot;&quot;&quot;

What is the syntax/convention for that ? Should I indent or not ? will it break reSTructuredText rendering ?


Multi-line description of a parameter description in python docstring

I can&#39;t figure out what does the `print(__doc__)` do at the beginning of a script, like [in this Scikit example][1].

I have been looking for **Python docstrings** in google, and it seems `__doc__` is useful to provide some documentation in, say, functions. But I can&#39;t see what does `__doc__` do in the middle of a script.


  [1]: http://scikit-learn.org/stable/auto_examples/classification/plot_digits_classification.html#example-classification-plot-digits-classification-py 

print(__doc__) in Python 3 script

I use the PyCharm IDE which assists with crafting PEP0257-compliant docstrings. It provides two attributes I don&#39;t entirely understand the distinction/use between:

 - `:raise Exception: exception explanation here`
 - `:raises Exception: exception explanation here`

When would I use `raise` as opposes to `raises` in my docstring? Specifically, if a class required an argument that was not provided and raises a `TypeError`, which should be used to document that?

Python Docstring: raise vs. raises

I did not find any best practice about what should be documented in the classes and `__init__` docstrings. Sometimes I find that the constructor arguments are already documented in the classes docstring, sometimes the are described in the `__init__` docstring. I prefer describing the construction within the classes docstring, as this is what you call when creating a new instance. But what should be documented in the `__init__` methods docstring then?

***********
_edit:_

I know about the [google styleguide][1] and the [google docstring style example][2], but both do not answer my question. The docstring style example does say 

&gt; The `__init__` method may be documented in either the class level
        docstring, or as a docstring on the `__init__` method itself.
Either form is acceptable, but the two should not be mixed. Choose one
        convention to document the `__init__` method and be consistent with it.

But if I choose to put the docstring of the `__init__` function into the class level docstring, what should the `__init__` docstring contain?

  [1]: https://google.github.io/styleguide/pyguide.html?showone=Comments#Comments
  [2]: https://sphinxcontrib-napoleon.readthedocs.io/en/latest/example_google.html

Content Type	Original Author	Original Content on Stackoverflow
Question	kalefranz	View Question on Stackoverflow
Solution 1 - Python	Nras	View Answer on Stackoverflow
Solution 2 - Python	Games Brainiac	View Answer on Stackoverflow
Solution 3 - Python	Kamil Sindi	View Answer on Stackoverflow

Custom PyCharm docstring stubs (i.e. for google docstring or numpydoc formats)

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Solution 3 - Python

Is the default Move constructor defined as noexcept?

How to extract a filename from a URL & append a word to it?

Attributions