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Replace all non Alpha Numeric characters, New Lines, and multiple White Space with one Space
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Be aware, that \W leaves the underscore. A short equivalent for [^a-zA-Z0-9] would be [\W_]
text.replace(/[\W_]+/g," ");
\W is the negation of shorthand \w for [A-Za-z0-9_] word characters (including the underscore)
Example at regex101.com
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Remap values in pandas column with a dict
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10 Answers
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How to remove convexity defects in a Sudoku square?
...Y = ImageMultiply[MorphologicalBinarize[GaussianFilter[srcAdjusted, 3, {2, 0}], {0.02, 0.05}], mask];
lX = ImageMultiply[MorphologicalBinarize[GaussianFilter[srcAdjusted, 3, {0, 2}], {0.02, 0.05}], mask];
I use connected component analysis again to extract the grid lines from these images. The g...
Could not locate Gemfile
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answered Jul 25 '10 at 16:40
JoniJoni
2,85733 gold badges2121 silver badges2222 bronze badges
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Small Haskell program compiled with GHC into huge binary
... for GNU/Linux 2.6.27, not stripped
$ ldd A
linux-vdso.so.1 => (0x00007fff1b9ff000)
libXrandr.so.2 => /usr/lib/libXrandr.so.2 (0x00007fb21f418000)
libX11.so.6 => /usr/lib/libX11.so.6 (0x00007fb21f0d9000)
libGLU.so.1 => /usr/lib/libGLU.so.1 (0x00007fb21ee6d000)
lib...
pandas: How do I split text in a column into multiple rows?
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207
+50
This spl...
Find integer index of rows with NaN in pandas dataframe
...MultiIndex that you can use to index back into df, e.g.:
df['a'].ix[index[0]]
>>> 1.452354
For the integer index:
df_index = df.index.values.tolist()
[df_index.index(i) for i in index]
>>> [3, 6]
share...
Delete rows from a pandas DataFrame based on a conditional expression involving len(string) giving K
...ions have worked for me, except the one posted by @4lberto . I'm on pandas 0.23.4 and python 3.6
– goelakash
Aug 25 '18 at 13:22
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What is the most efficient way of finding all the factors of a number in Python?
...(reduce(list.__add__,
([i, n//i] for i in range(1, int(n**0.5) + 1) if n % i == 0)))
This will return all of the factors, very quickly, of a number n.
Why square root as the upper limit?
sqrt(x) * sqrt(x) = x. So if the two factors are the same, they're both the square root. If ...
How to check whether a pandas DataFrame is empty?
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You can use the attribute df.empty to check whether it's empty or not:
if df.empty:
print(...