如何使用python日期时间功能/增量？

Question

I read many of the similar questions, the function is simple nested for loops used for the API, each minute I can call 5 times. So I set the range of 75 for one year data. Can you guys help me solve the problem? Thanks in advance!

The first part is working, enter the zip code from the list.

for zip in zipcode: 
    url4 = url1+str(zip)+url2

Second part is not working

for x in range (0,75):
   counter = x * 5
   startdate += datetime.timedelta(days=counter)
   enddate += datetime.timedelta(days=counter)
   url = url4+startdate+","+enddate+url3
   apifunction(url)

system said：

Traceback (most recent call last):
  File "<pyshell#51>", line 3, in <module>
    startdate += datetime.timedelta(days=counter)
AttributeError: type object 'datetime.datetime' has no attribute 'timedelta'

Answer 1

Probably you're importing like this

from datetime import datetime

This way you import datetime type from datetime module. And this type of course does not have timedelta type in it.

You should import like this:

import datetime

In this case you simply import datetime module, and when you do datetime.timedelta it means that you want to use type timedelta from module datetime

Answer 2

It looks like datetime is getting redefined somewhere else in your code.

>>> import datetime
>>> type(datetime)
<type 'module'>

Your 'datetime' there is an object, which probably means you made a variable and called it datetime somewhere else in your code.