Python函数错误:“<"类型'str'和'int'之间不支持 [英] Python function error : '<' not supported between types 'str' and 'int'

问题描述

我正在从事重复分类项目.我正在计算几天内重复和新邮件之间的时间间隔.我想在此时间间隔上应用一个函数，该函数指出是新邮件还是重复邮件.

I am working on repeats classification project. I am calculating time lapse in between a repeat and fresh mail in days. I want to apply a function on this time lapse which states whether it is a fresh mail or repeat mail.

功能:

days = df['days_difference']
if(days<30):
   return 'repeat'
else:
   return 'fresh'

我遇到错误:'str'和'int'实例之间不支持

I am getting error: not supported between instances of 'str' and 'int'

"days_difference"列包含整数值和无值.

'days_difference' column contains integer values along with None values.

寻找解决方案！

推荐答案

这基本上意味着您的'days'变量是一个字符串.您不能使用<"将字符串与整数进行比较.试试:

That basically means that your 'days ' variable is a string. You can not compare strings with integers using "<". Try :

...
if(int(days)<30):
...

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