I am trying to remove the first character from some of the columns in the dataframe df_rotina_pro. But I am getting the following error:

Column is not iterable.

Code:

transformed_df = (
    df_rotina_pro.withColumn(
        "cprodlim", F.substring(df_rotina_pro["cprodlim"], 2, F.length(["cprodlim"]))
    )
    .withColumn(
        "col1", F.substring(df_rotina_pro["col1"], 2, F.length(df_rotina_pro["col1"]))
    )
    .withColumn(
        "col2", F.substring(df_rotina_pro["col2"], 2, F.length(df_rotina_pro["col2"]))
    )
    .withColumn(
        "col3", F.substring(df_rotina_pro["col3"], 2, F.length(df_rotina_pro["col3"]))
    )
    .withColumn(
        "col4", F.substring(df_rotina_pro["col4"], 2, F.length(df_rotina_pro["col4"]))
    )
    .withColumn(
        "col5", F.substring(df_rotina_pro["col5"], 2, F.length(df_rotina_pro["col5"]))
    )
    .withColumn(
        "col6", F.substring(df_rotina_pro["col6"], 2, F.length(df_rotina_pro["col6"]))
    )
    .withColumn(
        "col7", F.substring(df_rotina_pro["col7"], 2, F.length(df_rotina_pro["col7"]))
    )
    .withColumn(
        "col8", F.substring(df_rotina_pro["col8"], 2, F.length(df_rotina_pro["col8"]))
    )
    .withColumn(
        "col9", F.substring(df_rotina_pro["col9"], 2, F.length(df_rotina_pro["col9"]))
    )
)

Please, help me to solve this because I have tried a lot of other ways to do it and none of them worked.