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Broken references in Virtualenvs
...r-x 1 ryan staff 78 Jun 25 13:21 .Python -> /usr/local/Cellar/python/2.7.7/Frameworks/Python.framework/Versions/2.7/Python
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When you upgrade Python using Homebrew and then run brew cleanup, the symlinks in the virtualenv point to paths that no longer exist (because Homebrew deleted them)....
Find all controls in WPF Window by type
... what do you mean "root element" ? What should I write to connect with my mainwindow form?
– deadfish
Dec 30 '11 at 16:02
1
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Max retries exceeded with URL in requests
...a resolver lookup issue, as indicated by the (Caused by <class 'socket.gaierror'>: [Errno -2] Name or service not known) part. "gai" stands for getaddrinfo, and the probable related error is: EAI_NONAME The node or service is not known; or both node and service are NULL; or AI_NUMERICSERV wa...
How to index into a dictionary?
...nce.)
If you do care about the order of the entries, starting with Python 2.7 you can use collections.OrderedDict. Or use a list of pairs
l = [("blue", "5"), ("red", "6"), ("yellow", "8")]
if you don't need access by key. (Why are your numbers strings by the way?)
In Python 3.7, normal dictio...
Serializing class instance to JSON
...on.dumps(obj, default=lambda x: x.__dict__)
Explanation:
Form the docs (2.7, 3.6):
``default(obj)`` is a function that should return a serializable version
of obj or raise TypeError. The default simply raises TypeError.
(Works on Python 2.7 and Python 3.x)
Note: In this case you need instance...
TaifunPlayer 扩展（Audio Player）：音频播放器扩展，支持流媒体播放控制 ...
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How do I detect the Python version at runtime? [duplicate]
...r. sys.version_info[1] would give you the minor version number.
In Python 2.7 and later, the components of sys.version_info can also be accessed by name, so the major version number is sys.version_info.major.
See also How can I check for Python version in a program that uses new language features?...
Mapping over values in a python dictionary
...:
my_dictionary = {k: f(v) for k, v in my_dictionary.items()}
In python 2.7, use the .iteritems() method instead of .items() to save memory. The dict comprehension syntax wasn't introduced until python 2.7.
Note that there is no such method on lists either; you'd have to use a list comprehension...
Better way to check variable for null or empty string?
Since PHP is a dynamic language what's the best way of checking to see if a provided field is empty?
10 Answers
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log messages appearing twice with Python Logging
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I used logger.handlers.pop() in python 2.7, does the trick
– radtek
Nov 25 '15 at 22:05
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