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How to comment out a block of code in Python [duplicate]
Is there a mechanism to comment out large blocks of Python code?
19 Answers
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process.env.NODE_ENV is undefined
...an environment variable in Windows:
SET NODE_ENV=development
on OS X or Linux:
export NODE_ENV=development
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Iterating through a JSON object
..., json_object[0][song].
None of this is specific to JSON. It's just basic Python types, with their basic operations as covered in any tutorial.
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Remove all the elements that occur in one list from another
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Python has a language feature called List Comprehensions that is perfectly suited to making this sort of thing extremely easy. The following statement does exactly what you want and stores the result in l3:
l3 = [x for x in ...
What exactly are iterator, iterable, and iteration?
... is the most basic definition of "iterable", "iterator" and "iteration" in Python?
13 Answers
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Inserting a Python datetime.datetime object into MySQL
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J McMahon: time is a Python module.
– dstromberg
Sep 1 '16 at 23:45
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python list in sql query as parameter
I have a python list, say l
15 Answers
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Python - When to use file vs open
What's the difference between file and open in Python? When should I use which one? (Say I'm in 2.5)
6 Answers
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assertEquals vs. assertEqual in python
Is there a difference between assertEquals and assertEqual in the python unittest.TestCase ?
7 Answers
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How can I read large text files in Python, line by line, without loading it into memory?
... do_something_with(line)
Even better is using context manager in recent Python versions.
with open("log.txt") as fileobject:
for line in fileobject:
do_something_with(line)
This will automatically close the file as well.
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