大约有 9,000 项符合查询结果（耗时：0.0332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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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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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
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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...
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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append multiple values for one key in a dictionary [duplicate]
I am new to python and I have a list of years and values for each year. What I want to do is check if the year already exists in a dictionary and if it does, append the value to that list of values for the specific key.
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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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