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Python: Select subset from list based on index set
...Edit: The first option is equivalent to itertools.compress available since Python 2.7/3.1. See @Gary Kerr's answer.
property_asel = list(itertools.compress(property_a, good_objects))
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impro...
Using Python's os.path, how do I go up one directory?
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@OriolNieto Yes, as of version Python 3.4+ you can use pathlib.Path.parents[levels_up-1]. See this question for more solutions
– jwalton
Apr 4 '19 at 15:22
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How can I analyze Python code to identify problematic areas?
... the docs, I don't think you can use the command line. You have to use the Python API.
– Dave Halter
Apr 8 '15 at 9:37
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How to copy a file to a remote server in Python using SCP or SSH?
I have a text file on my local machine that is generated by a daily Python script run in cron.
14 Answers
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Print a list in reverse order with range()?
How can you produce the following list with range() in Python?
19 Answers
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Writing a dict to txt file and reading it back?
...ve to it that is safer. This is called literal_eval and you get it from a Python module called ast.
import ast
def reading(self):
s = open('deed.txt', 'r').read()
self.whip = ast.literal_eval(s)
ast.literal_eval() will only evaluate strings that turn into the basic Python types, so ther...
How can I reverse a list in Python?
How can I do the following in Python?
35 Answers
35
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Understanding generators in Python
I am reading the Python cookbook at the moment and am currently looking at generators. I'm finding it hard to get my head round.
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Converting a list to a set changes element order
...rship tests and preservation of insertion order, you can use the keys of a Python dictionary, which starting from Python 3.7 is guaranteed to preserve the insertion order:
>>> a = dict.fromkeys([1, 2, 20, 6, 210])
>>> b = dict.fromkeys([6, 20, 1])
>>> dict.fromkeys(x for ...
In Python, how do I iterate over a dictionary in sorted key order?
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Haven't tested this very extensively, but works in Python 2.5.2.
>>> d = {"x":2, "h":15, "a":2222}
>>> it = iter(sorted(d.iteritems()))
>>> it.next()
('a', 2222)
>>> it.next()
('h', 15)
>>> it.next()
('x', 2)
>>>
If you...