I’m working with a Boolean index in Pandas.
The question is why the statement:
a[(a['some_column']==some_number) & (a['some_other_column']==some_other_number)]
works fine whereas
a[(a['some_column']==some_number) and (a['some_other_column']==some_other_number)]
exits with error?
Example:
a = pd.DataFrame({'x':[1,1],'y':[10,20]})
In: a[(a['x']==1)&(a['y']==10)]
Out: x y
0 1 10
In: a[(a['x']==1) and (a['y']==10)]
Out: ValueError: The truth value of an array with more than one element is ambiguous. Use a.any() or a.all()
