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How to use a custom comparison function in Python 3?
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A complete python3 cmp_to_key lambda example:
from functools import cmp_to_key
nums = [28, 50, 17, 12, 121]
nums.sort(key=cmp_to_key(lambda x, y: 1 if str(x)+str(y) < str(y)+str(x) else -1))
compare to common object sorting:
cla...
How can I see the entire HTTP request that's being sent by my Python application?
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for Python3 see here - docs.python-requests.org/en/latest/api/?highlight=debug from http.client import HTTPConnection
– shershen
Mar 15 '18 at 11:43
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Cannot kill Python script with Ctrl-C
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Looks like in python3 you can pass daemon=True to Thread.__init__
– Ryan Haining
Aug 14 '18 at 0:57
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Get __name__ of calling function's module in Python
...k :
>>> f = sys._current_frames().values()[0]
>>> # for python3: f = list(sys._current_frames().values())[0]
>>> print f.f_back.f_globals['__file__']
'/base/data/home/apps/apricot/1.6456165165151/caller.py'
>>> print f.f_back.f_globals['__name__']
'__main__'
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Escape regex special characters in a Python string
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In python3.4, where all strings are unicode, this doesn't seem to work at all, unfortunately. Instead, print(repr("I'm stuck")[1:-1]) prints I'm stuck.
– dantiston
Mar 4 '15 at 23:42
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Adding information to an exception?
...er Error: /v1/sendEmail/
Traceback (most recent call last):
File "venv/lib/python3.4/site-packages/rest_framework/views.py", line 275, in get_permissions
return [permission() for permission in self.permission_classes]
TypeError: 'type' object is not iterable
The above exception was the direct ...
Python executable not finding libpython shared library
...ng a simple CGI script:
tail /var/log/httpd/error_log
AH01215: /opt/rh/rh-python35/root/usr/bin/python: error while loading shared libraries: libpython3.5m.so.rh-python35-1.0: cannot open shared object file: No such file or directory
I wanted a systemwide permanent solution that works for all use...
Circular (or cyclic) imports in Python
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As of now, the only reference to circular imports in python3 "What's new?" pages is in the 3.5 one. It says "Circular imports involving relative imports are now supported". @meawoppl have you found anything else what is not listed in these pages?
– zezoll...
What's the difference between lists enclosed by square brackets and parentheses in Python?
...ove 'y=x' example , list and tuple behave in the same way now (verified in python3.8.5)
– Youjun Hu
Aug 15 at 9:11
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Which is the preferred way to concatenate a string in Python?
...building it up over a lot of operations.
from cStringIO import StringIO
# python3: from io import StringIO
buf = StringIO()
buf.write('foo')
buf.write('foo')
buf.write('foo')
buf.getvalue()
# 'foofoofoo'
If you already have a complete list returned to you from some other operation, then just ...