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What are good uses for Python3's “Function Annotations”
...tions/postconditions.
I feel something like this is especially needed in Python because of its weaker typing, but there were really no constructs that made this straightforward and part of the official syntax.
There are other uses for annotations beyond assurance. I can see how I could apply my ...
bs4.FeatureNotFound: Couldn't find a tree builder with the features you requested: lxml. Do you need
The above outputs on my Terminal. I am on Mac OS 10.7.x. I have Python 2.7.1, and followed this tutorial to get Beautiful Soup and lxml, which both installed successfully and work with a separate test file located here . In the Python script that causes this error, I have included this line:
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Python: Check if one dictionary is a subset of another larger dictionary
...instead of items() leads to about a 1.2x improvement. This was done using Python 2.7.
– Chad
Mar 29 '16 at 21:47
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How do you set your pythonpath in an already-created virtualenv?
...DIT #2
The right answer is @arogachev's one.
If you want to change the PYTHONPATH used in a virtualenv, you can add the following line to your virtualenv's bin/activate file:
export PYTHONPATH="/the/path/you/want"
This way, the new PYTHONPATH will be set each time you use this virtualenv.
ED...
How can I check if my python object is a number? [duplicate]
...However, in many cases you shouldn't worry about checking types manually - Python is duck typed and mixing somewhat compatible types usually works, yet it will barf an error message when some operation doesn't make sense (4 - "1"), so manually checking this is rarely really needed. It's just a bonus...
Python naming conventions for modules
...l N. For more on naming conventions and other style advice, see PEP 8, the Python style guide.
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How to enumerate an object's properties in Python?
...? in Javascript you could do: object[property] = newValue. How to do it in Python?
– Jader Dias
Aug 9 '09 at 18:32
39
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How to use XPath in Python?
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Active development and a community participation
Speed. This is really a python wrapper around a C implementation.
Ubiquity. The libxml2 library is pervasive and thus well tested.
Downsides include:
Compliance to the spec. It's strict. Things like default namespace handling are easier in othe...
e.printStackTrace equivalent in python
... an Exception) prints the occurred exception
but, I was trying to find the python equivalent of Java's e.printStackTrace() that exactly traces the exception to what line it occurred and prints the entire trace of it.
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How do you round UP a number in Python?
This problem is killing me. How does one roundup a number UP in Python?
24 Answers
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