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What is the use of “assert” in Python?
...condition, and immediately trigger an error if the condition is false.
In Python, it's roughly equivalent to this:
if not condition:
raise AssertionError()
Try it in the Python shell:
>>> assert True # nothing happens
>>> assert False
Traceback (most recent call last):
F...
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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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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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 ...
python list in sql query as parameter
I have a python list, say l
15 Answers
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Is it possible to have multiple statements in a python lambda expression?
I am a python newbie trying to achieve the following:
17 Answers
17
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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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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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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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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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