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How do I loop through a list by twos? [duplicate]
I want to loop through a Python list and process 2 list items at a time. Something like this in another language:
7 Answers...
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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Does Python have a ternary conditional operator?
If Python does not have a ternary conditional operator, is it possible to simulate one using other language constructs?
26 ...
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...
How to erase the file contents of text file in Python?
I have text file which I want to erase in Python. How do I do that?
12 Answers
12
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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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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...
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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Retrieving parameters from a URL
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Python 2:
import urlparse
url = 'http://foo.appspot.com/abc?def=ghi'
parsed = urlparse.urlparse(url)
print urlparse.parse_qs(parsed.query)['def']
Python 3:
import urllib.parse as urlparse
from urllib.parse import parse_qs...
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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