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return, return None, and no return at all?
... code will probably need to handle both types of return values).
Often in Python, functions which return None are used like void functions in C -- Their purpose is generally to operate on the input arguments in place (unless you're using global data (shudders)). Returning None usually makes it mor...
How to add an integer to each element in a list?
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This talk explains it: Facts and Myths about Python Names and Values: nedbatchelder.com/text/names1.html
– Ned Batchelder
Dec 2 '16 at 13:36
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Get difference between two lists
I have two lists in Python, like these:
27 Answers
27
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Formatting floats without trailing zeros
... @alexanderlukanin13 because the default precision is 6, see docs.python.org/2/library/string.html: 'f' Fixed point. Displays the number as a fixed-point number. The default precision is 6. You would have to use '%0.7f' in the above solution.
– derenio
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Extract part of a regex match
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Use ( ) in regexp and group(1) in python to retrieve the captured string (re.search will return None if it doesn't find the result, so don't use group() directly):
title_search = re.search('<title>(.*)</title>', html, re.IGNORECASE)
if title_sea...
How to frame two for loops in list comprehension python
...%2fquestions%2f18551458%2fhow-to-frame-two-for-loops-in-list-comprehension-python%23new-answer', 'question_page');
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Name
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Altering column size in SQL Server
... instead of the whole drop table thing?
– Anders Lindén
Sep 18 at 12:26
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Convert absolute path into relative path given a current directory using Bash
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$ python -c "import os.path; print os.path.relpath('/foo/bar', '/foo/baz/foo')"
gives:
../../bar
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Batch script to delete files
...er" && del "filename" & popd.
– Nuno André
Sep 18 '19 at 11:50
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Why do you need to put #!/bin/bash at the beginning of a script file?
... most systems run bash, the "Bourne Again Shell"), scripts can be in bash, python, perl, ruby, PHP, etc, etc. For example, you might see #!/bin/perl or #!/bin/perl5.
PS:
The exclamation mark (!) is affectionately called "bang". The shell comment symbol (#) is sometimes called "hash".
PPS:
Rememb...