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Python mock multiple return values
I am using pythons mock.patch and would like to change the return value for each call.
Here is the caveat:
the function being patched has no inputs, so I can not change the return value based on the input.
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Create a “with” block on several context managers? [duplicate]
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In Python 2.7 and 3.1 and above, you can write:
with A() as X, B() as Y, C() as Z:
do_something()
This is normally the best method to use, but if you have an unknown-length list of context managers you'll need one of the ...
Repeat string to certain length
...urn (string_to_expand * ((length/len(string_to_expand))+1))[:length]
For python3:
def repeat_to_length(string_to_expand, length):
return (string_to_expand * (int(length/len(string_to_expand))+1))[:length]
share
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clang: how to list supported target architectures?
...ee to add to it, community wiki style:
arm-none-eabi
armv7a-none-eabi
arm-linux-gnueabihf
arm-none-linux-gnueabi
i386-pc-linux-gnu
x86_64-apple-darwin10
i686-w64-windows-gnu # same as i686-w64-mingw32
x86_64-pc-linux-gnu # from ubuntu 64 bit
x86_64-unknown-windows-cygnus # cygwin 64-bit
x86_64-w6...
Why does comparing strings using either '==' or 'is' sometimes produce a different result?
I've got a Python program where two variables are set to the value 'public' . In a conditional expression I have the comparison var1 is var2 which fails, but if I change it to var1 == var2 it returns True .
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Download large file in python with requests
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With the following streaming code, the Python memory usage is restricted regardless of the size of the downloaded file:
def download_file(url):
local_filename = url.split('/')[-1]
# NOTE the stream=True parameter below
with requests.get(url, stream=Tr...
Is there shorthand for returning a default value if None in Python? [duplicate]
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Its Pythonic #PEP20 The Zen of Python Explicit is better than implicit. Better to handle only for None Cases if thats what it takes.
– Doogle
Jan 19 '18 at 4:53
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Check if OneToOneField is None in Django
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Note that in Python < 3.2, hasattr will swallow all exceptions that happen during the database lookup, and not just DoesNotExist. This is probably broken, and not what you want.
– Pi Delport
Mar 2...
Remove empty strings from a list of strings
I want to remove all empty strings from a list of strings in python.
12 Answers
12
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Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
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From "Equivalent of Bash Backticks in Python", which I asked a long time ago, what you may want to use is popen:
os.popen('cat /etc/services').read()
From the docs for Python 3.6,
This is implemented using subprocess.Popen; see that class’s
documentat...