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Pythonic way to check if a file exists? [duplicate]
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This answer is outdated. On Python 3.4+ use pathlib, like this: Path("path/to/file").is_file() if you want to check that it's a file and that it exists or Path("path/to/file").exists() if you only want to know that it exists (but might be a directory).
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Python serialization - Why pickle?
I understood that Python pickling is a way to 'store' a Python Object in a way that does respect Object programming - different from an output written in txt file or DB.
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如何抓住痛点做出让用户尖叫的产品 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...了发现的内容。分析的方式和方法很多，现在越来越注重数据层面的分析。还是以微信为例，相信很多人都体验过微信群的功能，群聊的内容有时候会很多，如果需要从上次看到内容开始看起，就要一直向下翻页，翻到上次看的...
Create an empty list in python with certain size
...None] * 10
for i in range(10):
lst[i] = i
Admittedly, that's not the Pythonic way to do things. Better do this:
lst = []
for i in range(10):
lst.append(i)
Or even simpler, in Python 2.x you can do this to initialize a list with values from 0 to 9:
lst = range(10)
And in Python 3.x:
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Are lists thread-safe?
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Lists themselves are thread-safe. In CPython the GIL protects against concurrent accesses to them, and other implementations take care to use a fine-grained lock or a synchronized datatype for their list implementations. However, while lists themselves can't go c...
Least common multiple for 3 or more numbers
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In Python (modified primes.py):
def gcd(a, b):
"""Return greatest common divisor using Euclid's Algorithm."""
while b:
a, b = b, a % b
return a
def lcm(a, b):
"""Return lowest common multiple."""
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Get __name__ of calling function's module in Python
...ller's function name, module, etc.
See the docs for details:
http://docs.python.org/library/inspect.html
Also, Doug Hellmann has a nice writeup of the inspect module in his PyMOTW series:
http://pymotw.com/2/inspect/index.html#module-inspect
EDIT: Here's some code which does what you want, I th...
How to convert an xml string to a dictionary?
...ml document stored in a string which I would like to convert directly to a Python dictionary, the same way it is done in Django's simplejson library.
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Circular list iterator in Python
... pool.next() didn't work for me, only next(pool). Probably because of Python 3?
– fjsj
Aug 21 '15 at 15:23
6
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Getting user input [duplicate]
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In python 3.x, use input() instead of raw_input()
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