df['column_a'][index] = 1
df['column_b'][index] = 2
df['column_c'][index] = 3
How to write 1,2 and 3 in one line? Would that consume 3x less time?
How to write multiple values in a row in one command line with pandas
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2 Answers
Use loc to do this in one assignment:
df.loc[index, ['column_a', ...]] = [1, 2, 3]
If index refers to a position and not a label, use
df.loc[df.index[index], ['column_a', ...]] = [1, 2, 3]
Maybe this:
df['column_a'][index], df['column_b'][index], df['column_c'][index] = 1, 2, 3
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