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Re-ordering columns in pandas dataframe based on column name [duplicate]
I have a dataframe with over 200 columns. The issue is as they were generated the order is
11 Answers
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In-memory size of a Python structure
Is there a reference for the memory size of Python data stucture on 32- and 64-bit platforms?
7 Answers
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Check if at least two out of three booleans are true
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.NET 4.0 has a new GAC, why?
...s the new GAC . Does it mean now we have to manage two GACs, one for .NET 2.0-3.5 applications and the other for .NET 4.0 applications?
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Getting SyntaxError for print with keyword argument end=' '
...re you sure you are using Python 3.x? The syntax isn't available in Python 2.x because print is still a statement.
print("foo" % bar, end=" ")
in Python 2.x is identical to
print ("foo" % bar, end=" ")
or
print "foo" % bar, end=" "
i.e. as a call to print with a tuple as argument.
That's o...
Apply pandas function to column to create multiple new columns?
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Building off of user1827356 's answer, you can do the assignment in one pass using df.merge:
df.merge(df.textcol.apply(lambda s: pd.Series({'feature1':s+1, 'feature2':s-1})),
left_index=True, right_index=True)
textcol feature1 feature...
How to print last two columns using awk
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awk '{print $(NF-1),"\t",$NF}' file
this assumes that you have at least 2 fields.
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Python data structure sort list alphabetically
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[] denotes a list, () denotes a tuple and {} denotes a dictionary. You should take a look at t...
Jackson serialization: ignore empty values (or null)
I'm currently using jackson 2.1.4 and I'm having some trouble ignoring fields when I'm converting an object to a JSON string.
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