我试图理解我的前同事编写的函数。
def generate_df(group):
date_str = str(group['CallerLocal_Date'].iloc[-1]) + ' {0}:00:00'
# some other functions
return something
enrich_df = df.groupby(['LeadNumber', 'CallerLocal_Date'], as_index=False).apply(generate_df).reset_index(drop=True)
我无法完全理解上面的函数,所以我试图分组并实际查看date_str = str(group['CallerLocal_Date'].iloc[-1]) + ' {0}:00:00'
行的作用。
df
看起来像这样
LeadNumber CallerLocal_Date Caller_TimeZone
0 7-OH4UMXXL5 2017-09-13 America/Chicago
1 7-OL4ZHUF47 2017-09-26 America/Chicago
2 7-OL4ZHUF47 2017-09-26 America/Chicago
3 7-OHMFNFFC2 2017-09-13 America/Chicago
4 7-OHMFNFFC2 2017-09-12 America/Chicago
5 7-OGBMIPIIN 2017-09-11 America/Chicago
6 7-OGBMIPIIN 2017-09-07 America/Chicago
7 7-OETJOA7O6 2017-09-01 America/Chicago
8 7-OETJOA7O6 2017-09-06 America/Chicago
9 7-OILTU4T5O 2017-09-18 America/Chicago
10 7-OGJHKCJFZ 2017-09-07 America/Chicago
所以我定义
group = df.groupby(['LeadNumber', 'CallerLocal_Date'], as_index=False)
并打电话
date_str = str(group['CallerLocal_Date'].iloc[-1]) + ' {0}:00:00'
然后我得到了
AttributeError: Cannot access callable attribute 'iloc' of 'DataFrameGroupBy' objects, try using the 'apply' method
有人可以指出如何在不使用apply
函数的情况下调试 groupby 对象吗?