大约有 6,400 项符合查询结果（耗时：0.0307秒） [XML]
Django: Get an object form the DB, or 'None' if nothing matches
...r functionality - this is a bad practice in most languages. How is that in python?
– pcv
Jan 7 '11 at 12:41
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How to split a string into a list?
I want my Python function to split a sentence (input) and store each word in a list. My current code splits the sentence, but does not store the words as a list. How do I do that?
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How to print a dictionary line by line in Python?
This is the dictionary
13 Answers
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How to return a part of an array in Ruby?
With a list in Python I can return a part of it using the following code:
6 Answers
6
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Check if string contains only whitespace
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This fails in Python 2.4 if string contains a non-breaking space, charcode U+00A0 or ALT+160. Looks fixed in Python 2.7, however.
– Kumba
Dec 22 '12 at 1:51
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python numpy ValueError: operands could not be broadcast together with shapes
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You are looking for np.matmul(X, y). In Python 3.5+ you can use X @ y.
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How can I beautify JavaScript code using Command Line?
...be a moving target. Now the info on jsbeautifier site says it's written in python.
– seth
Apr 26 '11 at 3:57
update fo...
Why return NotImplemented instead of raising NotImplementedError
Python has a singleton called NotImplemented .
4 Answers
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What is the syntax to insert one list into another list in python?
..., 2, 3, [4, 5, 6]]
foo.extend(bar) --> [1, 2, 3, 4, 5, 6]
http://docs.python.org/tutorial/datastructures.html
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When splitting an empty string in Python, why does split() return an empty list while split('\n') re
... gives two pieces. Making two cuts, gives three pieces.
And so it is with Python's str.split(delimiter) method:
>>> ''.split(',') # No cuts
['']
>>> ','.split(',') # One cut
['', '']
>>> ',,'.split(',') # Two cuts
['', '', '']
Question: And is there ...