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Difference between staticmethod and classmethod
... function into a class because it logically belongs with the class. In the Python source code (e.g. multiprocessing,turtle,dist-packages), it is used to "hide" single-underscore "private" functions from the module namespace. Its use, though, is highly concentrated in just a few modules -- perhaps an...
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...体实现，因此很多负载平衡服务器都允许用户添加自定义脚本以执行特定于服务实例的查询。这些状态查询请求常常包含了很多测试，甚至会尝试从服务实例中返回数据。
一旦负载平衡服务器发现其所管理的某个服务实例不再...
Pip install Matplotlib error with virtualenv
...
Building Matplotlib requires libpng (and freetype, as well) which isn't a python library, so pip doesn't handle installing it (or freetype).
You'll need to install something along the lines of libpng-devel and freetype-devel (or whatever the equivalent is for your OS).
See the building requirem...
How do I check if a variable exists?
...d is likely to result in unpredictable behaviour.
If you need to do it in Python, the following trick, which is similar to yours, will ensure that a variable has some value before use:
try:
myVar
except NameError:
myVar = None
# Now you're free to use myVar without Python complaining.
H...
How to check a string for specific characters?
How can I check if a string has several specific characters in it using Python 2?
5 Answers
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Difference between __str__ and __repr__?
What is the difference between __str__ and __repr__ in Python?
23 Answers
23
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How to get string objects instead of Unicode from JSON?
I'm using Python 2 to parse JSON from ASCII encoded text files.
21 Answers
21
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Numpy array dimensions
I'm currently trying to learn Numpy and Python. Given the following array:
8 Answers
8...
Encoding an image file with base64
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With python 2.x, you can trivially encode using .encode:
with open("path/to/file.png", "rb") as f:
data = f.read()
print data.encode("base64")
s...
Why are trailing commas allowed in a list?
I am curious why in Python a trailing comma in a list is valid syntax, and it seems that Python simply ignores it:
5 Answer...