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Can I install Python 3.x and 2.x on the same Windows computer?
...when you run a program on the command line. Will this break if I install a 2.x and 3.x version of Python on the same machine?
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What exactly does big Ө notation represent?
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edited Aug 20 '17 at 2:43
Pierre-Antoine Guillaume
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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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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...
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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How do I check which version of NumPy I'm using?
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392
import numpy
numpy.version.version
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Python data structure sort list alphabetically
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241
[] denotes a list, () denotes a tuple and {} denotes a dictionary. You should take a look at t...
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...
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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