October 2019
Beginner to intermediate
674 pages
16h 43m
English
Content preview from Mastering pandas - Second Edition
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Row index
If a file has one more column of data than the number of column names, the first column will be used as the DataFrame's row names:
data = 'a,b,c\n4,apple,bat,5.7\n8,orange,cow,10'pd.read_csv(StringIO(data), index_col=0)
We get the following output:
The column with values but no corresponding column name is used as a row index.
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