This is not actually a PEP8 violation. I simply do this:

    from .my_class import MyClass  # noqa

Edit: Another possibility is to use ``__all__``. In that case, flake8 understands what is going on:

    from .my_class import MyClass
    
    __all__ = [&#39;MyClass&#39;,]

According to [PEP 8][1], you should include `MyClass` in [``__all__``][2], which will also fix the imported-but-not-used issue:

&gt; To better support introspection, modules should explicitly declare the
&gt; names in their public API using the \__all__ attribute.

  [1]: https://www.python.org/dev/peps/pep-0008/
  [2]: https://stackoverflow.com/questions/44834/can-someone-explain-all-in-python

According to [flake8&#39;s documention](https://flake8.pycqa.org/en/stable/user/violations.html#in-line-ignoring-errors), you can in-line ignore this specific warning with:

    from .my_class import MyClass  # noqa: F401

For reference, here are flake8&#39;s [error codes](https://flake8.pycqa.org/en/stable/user/error-codes.html).

In Rust (like most programming languages), the `%` operator performs the *remainder* operation, not the *modulus* operation. These [operations have different results for negative numbers](https://stackoverflow.com/q/13683563/155423):

&lt;!-- language: none --&gt;

    -21 modulus 4 =&gt; 3
    -21 remainder 4 =&gt; -1

&lt;!-- --&gt;

    println!(&quot;{}&quot;, -21 % 4); // -1

However, I **want** the modulus.

I found a workaround `((a % b) + b) % b`, but I don&#39;t want to reinvent the wheel if there&#39;s already a function for that!

Is there a modulus (not remainder) function / operation?

I use ``UIButton`` with auto layout. When images are small the tap area is also small. I could imagine several approaches to fix this: 

1. increase the image size, i.e., place a transparent area around the image. This is not good because when you position the image you have to keep the extra transparent border in mind.
2. use CGRectInset and increase the size. This does not work well with auto layout because using auto layout it will fall back to the original image size.

**Beside the two approaches above is there a better solution to increase the tap area of a UIButton?** 

How can I increase the Tap Area for UIButton?

I&#39;m doing PEP8 checks in python using the python [flake8][1] library. I have an import statement in an `__init__.py` file in one of my sub-modules which looks like this:

    from .my_class import MyClass

The reason I have this line in the init file is so that I can import MyClass from the sub-module as `from somemodule import MyClass` instead of having to write `from somemodule.my_class import MyClass`.

I would like to know if it is possible to maintain this functionality while correcting the PEP8 violation?


  [1]: https://pypi.python.org/pypi/flake8

python pep8 class in init imported but not used

I'm doing PEP8 checks in python using the python <a href="https://pypi.python.org/pypi/flake8" target="_blank" rel="noopener noreferrer">flake8</a> library. I have an import statement in an <code>__init__.py</code> file in one of my sub-modules which looks like this:
<pre><code class="hljs language-javascript">from .my_class import MyClass
</code></pre>
The reason I have this line in the init file is so that I can import MyClass from the sub-module as <code>from somemodule import MyClass</code> instead of having to write <code>from somemodule.my_class import MyClass</code>.
I would like to know if it is possible to maintain this functionality while correcting the PEP8 violation?

I have followed the procedure given in https://stackoverflow.com/questions/20112989/how-to-use-valgrind-with-python for checking memory leaks in my python code. 

I have my python source under the path

    /root/Test/ACD/atech

I have given above path in `PYTHONPATH`. Everything is working fine if I run the code with default python binary, located under `/usr/bin/`. 
I need to run the code with the python binary I have build manually which is located under

    /home/abcd/workspace/python/bin/python

Then I am getting the following error 

    from concurrent.futures.process import ProcessPoolExecutor
    ImportError: No module named concurrent.futures.process

How can I solve this?



ImportError: No module named concurrent.futures.process

I am novice to Python and following a tutorial. There is an example of `list` in the tutorial :

    example = list(&#39;easyhoss&#39;)
Now, In tutorial, `example= [&#39;e&#39;,&#39;a&#39;,...,&#39;s&#39;]`. But in my case I am getting following error:

    &gt;&gt;&gt; example = list(&#39;easyhoss&#39;)
    Traceback (most recent call last):
      File &quot;&lt;stdin&gt;&quot;, line 1, in &lt;module&gt;
    TypeError: &#39;list&#39; object is not callable

Please tell me where I am wrong. I searched SO [this][1] but it is different.


  [1]: https://stackoverflow.com/questions/5735841/python-typeerror-list-object-is-not-callable

TypeError: &#39;list&#39; object is not callable in python

How can I remove duplicate rows of a 2 dimensional `numpy` array?

    data = np.array([[1,8,3,3,4],
                     [1,8,9,9,4],
                     [1,8,3,3,4]])

The answer should be as follows:

    ans = array([[1,8,3,3,4],
                 [1,8,9,9,4]])

If there are two rows that are the same, then I would like to remove one &quot;duplicate&quot; row.

Remove duplicate rows of a numpy array

How to return `False` if all elements are in a list are `False`?

The given list is:

    data = [False, False, False]


Test if all elements of a python list are False

I used `Counter` on a list to compute this variable:

    final = Counter(event_container)

print final gives:

    Counter({&#39;fb_view_listing&#39;: 76, &#39;fb_homescreen&#39;: 63, &#39;rt_view_listing&#39;: 50, &#39;rt_home_start_app&#39;: 46, &#39;fb_view_wishlist&#39;: 39, &#39;fb_view_product&#39;: 37, &#39;fb_search&#39;: 29, &#39;rt_view_product&#39;: 23, &#39;fb_view_cart&#39;: 22, &#39;rt_search&#39;: 12, &#39;rt_view_cart&#39;: 12, &#39;add_to_cart&#39;: 2, &#39;create_campaign&#39;: 1, &#39;fb_connect&#39;: 1, &#39;sale&#39;: 1, &#39;guest_sale&#39;: 1, &#39;remove_from_cart&#39;: 1, &#39;rt_transaction_confirmation&#39;: 1, &#39;login&#39;: 1})

Now I want to convert `final` into a Pandas `DataFrame`, but when I&#39;m doing:

    final_df = pd.DataFrame(final)

but I got an error.

I guess final is not a proper dictionary, so how can I convert `final` to a dictionary? Or is it an other way to convert `final` to a `DataFrame`?

Transform a Counter object into a Pandas DataFrame

# Problem
PEP8 has a rule about putting imports at the top of a file:

&gt; Imports are always put at the top of the file, just after any module comments and docstrings, and before module globals and constants.

However, in certain cases, I might want to do something like:

    import sys
    sys.path.insert(&quot;..&quot;, 0)
    
    import my_module

In this case, the `pep8` command line utility flags my code:

&gt; E402 module level import not at top of file

What is the best way to achieve PEP8 compliance with `sys.path` modifications?

# Why

I have this code because I&#39;m following [the project structure](https://github.com/kennethreitz/samplemod) given in [The Hitchhiker&#39;s Guide to Python](http://docs.python-guide.org/en/latest/writing/structure/#structure-of-the-repository).

That guide suggests that I have a `my_module` folder, separate from a `tests` folder, both of which are in the same directory. If I want to access `my_module` from `tests`, I think I need to add `..` to the `sys.path`


PEP8 –&#160;import not at top of file with sys.path

While searching through a Python project, I found a few lines commented with `# noqa`.


    import sys
    sys.path.append(r&#39;C:\dev&#39;)
    import some_module   # noqa


What does `noqa` mean in Python? Is it specific to Python only?

What does &#39;# noqa&#39; mean in Python comments?

The [*Ignoring Errors*](http://flake8.pycqa.org/en/3.1.1/user/ignoring-errors.html) docs currently list a way of ignoring a particular error for a particular line:

    example = lambda: &#39;example&#39;  # noqa: E731

... and a way of ignoring *all* errors for an entire file:

    # flake8: noqa
    
    from foo import unused
    function_that_doesnt_exist()
    x = 1+       2

... and a couple of ways, either through config or through command-line options, of disabling a particular error *globally* across an entire project.

But what if I want to ignore a *particular* error across the entirety of a *single* file - for instance, to disable warnings about unused imports in an `__init__.py` barrel file that just imports a bunch of classes so that code from other packages can import them from it in turn? The docs don&#39;t seem to hint at any syntax for this. Is it possible?

Flake8: Ignore specific warning for entire file

Two things that annoy me. First is the warning Flake8 gives me when I type more than 80 characters on a line. Second is the warnings I get when I haven&#39;t yet used a module name that I imported. I&#39;ve looked at all the documentation on using Flake8 in the terminal. No use.

    flake8 --ignore=E402
    flake8 --max-line-length=120


This doesn&#39;t work. At least VS Code doesn&#39;t show any effect.

Content Type	Original Author	Original Content on Stackoverflow
Question	Salvius	View Question on Stackoverflow
Solution 1 - Python	René Fleschenberg	View Answer on Stackoverflow
Solution 2 - Python	Mihai Capotă	View Answer on Stackoverflow
Solution 3 - Python	Mike T	View Answer on Stackoverflow

python pep8 class in init imported but not used

Python Problem Overview

Python Solutions

Solution 1 - Python

Solution 2 - Python

Solution 3 - Python

How can I increase the Tap Area for UIButton?

Is there a modulus (not remainder) function / operation?

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