Pandas (56)

How to swap two rows of a dataframe?

# Input
df = pd.DataFrame(np.arange(25).reshape(5, -1))

# Solution
def swap_rows(df, i1, i2):
    a, b = df.iloc[i1, :].copy(), df.iloc[i2, :].copy()
    df.iloc[i1, :], df.iloc[i2, :] = b, a
    return df

print(swap_rows(df, 1, 2))

# output
    0   1   2   3   4
0   0   1   2   3   4
1  10  11  12  13  14
2   5   6   7   8   9
3  15  16  17  18  19
4  20  21  22  23  24