我有以下pandas数据框src
:
my_df
我想根据以下条件添加新的col_A col_B
-------------------
blue medium
red small
yellow big
:
col_C
为实现这一目标,我做了以下工作:
if col_A == 'blue', col_C = 'A_blue'
if col_B == 'big', col_C = 'B_big'
For all other cases, col_C = ''
但是我收到了以下错误:
def my_bad_data(row):
if row['col_A'] == 'blue':
return 'A_blue'
elif row['col_B'] == 'big':
return 'B_big'
else:
return ''
my_df['col_C'] = my_df.apply(lambda row: my_bad_data(row))
知道我在这里做错了吗?谢谢!
答案 0 :(得分:1)
是的,我经常遇到这种情况,你想要$sql= "SELECT *
FROM staff
WHERE BusinessID = $BusinessID";
。请参阅文档here:
dataframe.apply(func, axis=1)