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Get the first item from an iterable that matches a condition
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In Python 2.6 or newer:
If you want StopIteration to be raised if no matching element is found:
next(x for x in the_iterable if x > 3)
If you want default_value (e.g. None) to be returned instead:
next((x for x in the_it...
How to print instances of a class using print()?
I am learning the ropes in Python. When I try to print an object of class Foobar using the print() function, I get an output like this:
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Is there an Eclipse plugin to run system shell in the Console? [closed]
... approach would be to use ${env_var:SHELL} which under the Mac (and I hope Linux) launches the default shell. Then in the Working Directory you can use the variable ${project_loc} to set the default directory to your current project location. This will mean that when you launch the tool, you have t...
Flattening a shallow list in Python [duplicate]
... hadn't heard from from_iterable. it's prettier than the *, if less pythonic
– Jules G.M.
Mar 29 '16 at 22:04
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How to count the number of files in a directory using Python
I need to count the number of files in a directory using Python.
24 Answers
24
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NameError: name 'reduce' is not defined in Python
I'm using Python 3.2. Tried this:
5 Answers
5
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How to randomly select an item from a list?
...orrect', 'horse', 'staple']
print(secrets.choice(foo))
secrets is new in Python 3.6, on older versions of Python you can use the random.SystemRandom class:
import random
secure_random = random.SystemRandom()
print(secure_random.choice(foo))
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Get loop count inside a Python FOR loop
In a Python for loop that iterates over a list we can write:
5 Answers
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String concatenation vs. string substitution in Python
In Python, the where and when of using string concatenation versus string substitution eludes me. As the string concatenation has seen large boosts in performance, is this (becoming more) a stylistic decision rather than a practical one?
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Python read-only property
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Generally, Python programs should be written with the assumption that all users are consenting adults, and thus are responsible for using things correctly themselves. However, in the rare instance where it just does not make sense for ...