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How do Python's any and all functions work?
I'm trying to understand how the any() and all() Python built-in functions work.
8 Answers
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Checking whether a variable is an integer or not [duplicate]
...If you need to do this, do
isinstance(<var>, int)
unless you are in Python 2.x in which case you want
isinstance(<var>, (int, long))
Do not use type. It is almost never the right answer in Python, since it blocks all the flexibility of polymorphism. For instance, if you subclass int, y...
How can I implement a tree in Python?
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anytree
I recommend https://pypi.python.org/pypi/anytree (I am the author)
Example
from anytree import Node, RenderTree
udo = Node("Udo")
marc = Node("Marc", parent=udo)
lian = Node("Lian", parent=marc)
dan = Node("Dan", parent=udo)
jet = Node("Jet", parent...
bash: mkvirtualenv: command not found
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I had the same issue on OS X 10.9.1 with python 2.7.5. No issues with WORKON_HOME for me, but I did have to manually add source "/usr/local/bin/virtualenvwrapper.sh" to ~/.bash_profile (or ~/.bashrc in unix) after I ran pip install virtualenvwrapper
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What is a Python equivalent of PHP's var_dump()? [duplicate]
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This was helpful. I am a Python noob but what seemed to help my case was using .__dict__, e.g. pprint(object.__dict__).
– Elijah Lynn
Nov 15 '17 at 17:08
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How to get week number in Python?
How to find out what week number is current year on June 16th (wk24) with Python?
14 Answers
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PyLint “Unable to import” error - how to set PYTHONPATH?
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There are two options I'm aware of.
One, change the PYTHONPATH environment variable to include the directory above your module.
Alternatively, edit ~/.pylintrc to include the directory above your module, like this:
[MASTER]
init-hook='import sys; sys.path.append("/path/to/ro...
Python circular importing?
...e issue is both rare, and probably a bug in the import implementation. See Python bug 23447, which I submitted a patch for (which alas has been languishing).
– Blckknght
May 6 '16 at 1:48
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HTTP error 403 in Python 3 Web Scraping
...ture which blocks known spider/bot user agents (urllib uses something like python urllib/3.3.0, it's easily detected). Try setting a known browser user agent with:
from urllib.request import Request, urlopen
req = Request('http://www.cmegroup.com/trading/products/#sortField=oi&sortAsc=false&am...
Chained method calls indentation style in Python [duplicate]
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Raymond, what's the reason Python doesn't allow new line before and after a dot? This makes good formatting harder not easier...
– Piotr Dobrogost
Apr 1 '13 at 18:45
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