如何按函数向dataframe添加多列

创建词典:

dictionary= { 'c':'', 'd':-1 }

def new_columns(df, dictionary):
    return df.assign(**dictionary)

然后和你的df联系:

df = new_columns(df, dictionary)

或者(如果您不需要函数调用,不确定您的用例是什么):

df.assign(**dictionary)

def update_df(a_df, new_cols_names, new_cols_vals):
  for n, v in zip(new_cols_names, new_cols_vals):
    a_df[n] = v

update_df(df, ['c', 'd', 'e'], ['', 5, 6])