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How to convert Nonetype to int or string?
...erally a number, but could be None . I want to divide it by a number, but Python raises:
10 Answers
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How to check if all of the following items are in a list?
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Operators like <= in Python are generally not overriden to mean something significantly different than "less than or equal to". It's unusual for the standard library does this--it smells like legacy API to me.
Use the equivalent and more clearl...
pandas DataFrame: replace nan values with average of columns
...w why, but df.fillna(df.mean()) didnt work, only your version with apply. Python 3
– Rocketq
Dec 25 '17 at 11:22
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What is “vectorization”?
...UMPY(not sure of other else).
Numpy (package for scientific computing in python) , uses vectorization for speedy manipulation of n-dimensional array ,which generally is slower if done with in-built python options for handling arrays.
although tons of explanation are out there , HERE'S WHAT VECTOR...
The written versions of the logical operators
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I personally think they are much better... but then I am Python biased. I don't know why some people thing that if it's not garbled it's not code...
– Matthieu M.
Mar 4 '10 at 8:28
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Why doesn't Objective-C support private methods?
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More python being "obj-c-ic" :). Guido was quite proactive in maintaining Python on NeXT systems, including creating the 1st version of PyObjC. Thus, ObjC did influence python somewhat.
– bbum
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How to exit from PostgreSQL command line utility: psql
...tion to always working in pgsql it'll work in most your other unix shells (python, mysql, etc). If you always do things the "standard" way in 'nix your brain will be less cluttered with trivia.
– hobs
Nov 7 '13 at 22:10
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Change column type from string to float in Pandas
...ul).
infer_objects() - a utility method to convert object columns holding Python objects to a pandas type if possible.
convert_dtypes() - convert DataFrame columns to the "best possible" dtype that supports pd.NA (pandas' object to indicate a missing value).
Read on for more detailed explanatio...
Generate a random date between two other dates
...e timestamp back to date string and you have a random time in that range.
Python example (output is almost in the format you specified, other than 0 padding - blame the American time format conventions):
import random
import time
def str_time_prop(start, end, format, prop):
"""Get a time at a...
Get Image size WITHOUT loading image into memory
...ontents, PIL is probably an overkill.
I suggest parsing the output of the python magic module:
>>> t = magic.from_file('teste.png')
>>> t
'PNG image data, 782 x 602, 8-bit/color RGBA, non-interlaced'
>>> re.search('(\d+) x (\d+)', t).groups()
('782', '602')
This is a w...