how to add the column to the beginning of dataframe
# Third position would be at index 2, because of zero-indexing.
df.insert(2, 'new-col', data)how to add the column to the beginning of dataframe
# Third position would be at index 2, because of zero-indexing.
df.insert(2, 'new-col', data)add column to start of dataframe pandas
df.insert(loc, column, value)add column using a list at poisition zero pandas
df = pd.DataFrame({'B': [1, 2, 3], 'C': [4, 5, 6]})
df
Out:
B C
0 1 4
1 2 5
2 3 6
idx = 0
new_col = [7, 8, 9] # can be a list, a Series, an array or a scalar
df.insert(loc=idx, column='A', value=new_col)
df
Out:
A B C
0 7 1 4
1 8 2 5
2 9 3 6Copyright © 2021 Codeinu
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