大约有 13,000 项符合查询结果（耗时：0.0193秒） [XML]
Round a Floating Point Number Down to the Nearest Integer?
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This seems like the most Pythonic approach.
– Gyan Veda
Jun 16 '14 at 19:40
23
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Should I use multiplication or division?
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Python:
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 / 2.0'
real 0m26.676s
user 0m25.154s
sys 0m0.076s
time python -c 'for i in xrange(int(1e8)): t=12341234234.234 * 0.5'
real 0m17.932s
user ...
Is there a way to pass optional parameters to a function?
Is there a way in Python to pass optional parameters to a function while calling it and in the function definition have some code based on "only if the optional parameter is passed"
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Why use def main()? [duplicate]
...on that is called when the program is executed. Using this if, we can make Python behave like them, which feels more familiar for many people.
Code will be cleaner, easier to read, and better organized. (yeah, I know this is subjective)
It will be possible to import that python code as a module wi...
How to perform element-wise multiplication of two lists?
...an element wise multiplication, to multiply two lists together by value in Python, like we can do it in Matlab.
14 Answers
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Remove duplicate dict in list in Python
...you can remove duplicates using set (using a set comprehension here, older python alternative would be set(tuple(d.items()) for d in l)) and, after that, re-create the dictionaries from tuples with dict.
where:
l is the original list
d is one of the dictionaries in the list
t is one of the tuples...
Python list subtraction operation
...is a "set subtraction" operation. Use the set data structure for that.
In Python 2.7:
x = {1,2,3,4,5,6,7,8,9,0}
y = {1,3,5,7,9}
print x - y
Output:
>>> print x - y
set([0, 8, 2, 4, 6])
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Download a file by jQuery.Ajax
...ludes many other, 'better UX' examples as well.
$.fileDownload('some/file.pdf')
.done(function () { alert('File download a success!'); })
.fail(function () { alert('File download failed!'); });
Depending on what browsers you need to support you may be able to use https://github.com/eligre...
Removing multiple keys from a dictionary safely
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This. This is the clever Pythonista's choice. dict.pop() eliminates the need for key existence testing. Excellent.
– Cecil Curry
Mar 11 '16 at 1:51
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Conditional Replace Pandas
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yield error: /opt/anaconda3/envs/python35/lib/python3.5/site-packages/ipykernel_launcher.py:1: SettingWithCopyWarning: A value is trying to be set on a copy of a slice from a DataFrame See the caveats in the documentation: pandas.pydata.org/pandas-docs/sta...