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Re-raise exception with a different type and message, preserving existing information
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Python 3 introduced exception chaining (as described in PEP 3134). This allows, when raising an exception, to cite an existing exception as the “cause”:
try:
frobnicate()
except KeyError as exc:
raise ValueError("...
How to send a “multipart/form-data” with requests in python?
How to send a multipart/form-data with requests in python? How to send a file, I understand, but how to send the form data by this method can not understand.
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How to crop an image in OpenCV using Python
...to create code blocks and can share your jupytor notebook on stackoverflow python chat room to get someones help.
– samkhan13
Aug 28 '19 at 16:37
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Split a string at uppercase letters
What is the pythonic way to split a string before the occurrences of a given set of characters?
16 Answers
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Do regular expressions from the re module support word boundaries (\b)?
...e the \b to match a word boundary. However, the following snippet in the Python interpreter does not work as expected:
4 ...
Installing SciPy and NumPy using pip
...depended on numpy and scipy. In a clean installation of Fedora 23, using a python virtual environment for Python 3.4 (also worked for Python 2.7), and with the following in my setup.py (in the setup() method)
setup_requires=[
'numpy',
],
install_requires=[
'numpy',
'scipy',
],
I found...
TypeError: module.__init__() takes at most 2 arguments (3 given)
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@VMAtm: Why dont you try it and find out. Python's great cos it has the interpreter. Great for quick experimentation
– Sheena
Jan 27 '17 at 5:10
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Reloading submodules in IPython
Currently I am working on a python project that contains sub modules and uses numpy/scipy. Ipython is used as interactive console. Unfortunately I am not very happy with workflow that I am using right now, I would appreciate some advice.
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Comparing two dictionaries and checking how many (key, value) pairs are equal
... dictionaries [...]". The 'invalid dict' above with list keys is not valid python code - dict keys must be immutable. Therefore you are not comparing dictionaries. If you try and use a list as a dictionary key your code will not run. You have no objects for which to compare. This is like typing x = ...
Best way to find the intersection of multiple sets?
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From Python version 2.6 on you can use multiple arguments to set.intersection(), like
u = set.intersection(s1, s2, s3)
If the sets are in a list, this translates to:
u = set.intersection(*setlist)
where *a_list is list expan...