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Find integer index of rows with NaN in pandas dataframe
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For DataFrame df:
import numpy as np
index = df['b'].index[df['b'].apply(np.isnan)]
will give you back the 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...
Why are Python lambdas useful? [closed]
I'm trying to figure out Python lambdas. Is lambda one of those "interesting" language items that in real life should be forgotten?
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Logic to test that 3 of 4 are True
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I suggest writing the code in a manner that indicates what you mean. If you want 3 values to be true, it seems natural to me that the value 3 appears somewhere.
For instance, in C++:
if ((int)a + (int)b + (int)c + (int)d == 3)
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Evenly space multiple views within a container view
Auto Layout is making my life difficult. In theory, it was going to be really useful when I switched, but I seem to fight it all of the time.
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How can I run PowerShell with the .NET 4 runtime?
I am updating a PowerShell script that manages some .NET assemblies. The script was written for assemblies built against .NET 2 (the same version of the framework that PowerShell runs with), but now needs to work with .NET 4 assemblies as well as .NET 2 assemblies.
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Two-dimensional array in Swift
I get so confused about 2D arrays in Swift. Let me describe step by step. And would you please correct me if I am wrong.
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Looping through the content of a file in Bash
How do I iterate through each line of a text file with Bash ?
13 Answers
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Compiling with cython and mingw produces gcc: error: unrecognized command line option '-mno-cygwin'
I'm trying to compile a python extension with cython in win 7 64-bit using mingw (64-bit).
I'm working with Python 2.6 (Active Python 2.6.6) and with the adequate distutils.cfg file (setting mingw as the compiler)
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C++11 reverse range-based for-loop
Is there a container adapter that would reverse the direction of iterators so I can iterate over a container in reverse with range-based for-loop?
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How do I see the commit differences between branches in git?
...want to see all the differences between MASTER and the branch that I am on in terms of commits. I could just do a
10 Answe...