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Length of generator output [duplicate]
Python provides a nice method for getting length of an eager iterable, len(x) that is. But I couldn't find anything similar for lazy iterables represented by generator comprehensions and functions. Of course, it is not hard to write something like:
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Is there a naming convention for Django apps
... Underscores can be used
in the module name if it improves readability. Python packages should
also have short, all-lowercase names, although the use of underscores is
discouraged.
So, 1 and 3 are both valid, but 3 would be the recommended approach.
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What programming practice that you once liked have you since changed your mind about? [closed]
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What about in dynamically-typed languages, such as Python or JavaScript? I still find it helpful to use Hungarian notation in these languages so that, when looking at variables, I know what type of variable to expect (if there is a type to expect - of course, it would be fool...
What rules does Pandas use to generate a view vs a copy?
...as this is faster and will always work
The chained indexing is 2 separate python operations and thus cannot be reliably intercepted by pandas (you will oftentimes get a SettingWithCopyWarning, but that is not 100% detectable either). The dev docs, which you pointed, offer a much more full explanati...
Excluding directories in os.walk
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This is not really bad but not idiomatic Python either in my opinion.
– Torsten Bronger
Dec 16 '16 at 6:07
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Why are Docker container images so large?
...:
FROM nodejs as builder
WORKDIR /var/my-project
RUN apt-get install ruby python git openssh gcc && \
git clone my-project . && \
npm install
FROM nodejs
COPY --from=builder /var/my-project /var/my-project
Will result in an image having only the nodejs base image plus the...
Formatting code snippets for blogging on Blogger [closed]
...s of code snippets then you have to do a lot of copy paste. For formatting Python code I've also used Pygments (blog post).
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How do you suppress output in IPython Notebook?
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Note this only works for Python kernels (e.g. not R).
– Max Ghenis
Feb 20 at 5:47
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Download a single folder or directory from a GitHub repo
... An example: to download the content in https://github.com/miguelgrinberg/python-socketio/tree/master/examples/wsgi, run svn export https://github.com/miguelgrinberg/python-socketio.git/trunk/examples/wsgi. A directory called wsgi will be created under the current working directory. Only source fil...
How do you get the index of the current iteration of a foreach loop?
... generate a list of integers with the same length and then zip them (as in Python's zip function).
– jpmc26
Sep 2 '17 at 1:29
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