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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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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...
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...
When to use dynamic vs. static libraries
...ject. In other words, on Windows, A 1 MB DLL used by 3 programs = 3 MB. On Linux, A MB SO used by 3 programs = 1 MB.
– Zifre
Oct 17 '10 at 1:15
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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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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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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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Converting dict to OrderedDict
... having some trouble using the collections.OrderedDict class. I am using Python 2.7 on Raspbian, the Debian distro for Raspberry Pi. I am trying to print two dictionaries in order for comparison (side-by-side) for a text-adventure. The order is essential to compare accurately.
No matter what I try...
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...