我正在创建一个字符串,然后我在查询mongodb集合的方法中使用它。最终日期将来自用户输入。这是相关的代码和字符串:
import pymongo
from pymongo import MongoClient
from datetime import datetime
import time
import datetime
start_yr = 2015
start_mnth = 2
start_day = 1
end_yr = 2015
end_mnth = 2
end_day = 28
# this is the line called in the error
created_at_string = { "created_at": {"$gte" : datetime(start_yr, start_mnth, start_day),"$lt" : datetime(end_yr, end_mnth, end_day)}}
我们的想法是在更复杂的查询方法中使用created_at_string
作为参数。
我得到了:
Traceback (most recent call last):
File "main.py", line 218, in <module>
program.runProgram()
File "main.py", line 61, in runProgram
report.RcreateReport()
File "/filepath/report.py", line 95, in RcreateReport
created_at_string = { "created_at": {"$gte" : datetime(start_yr, start_mnth, start_day),"$lt" : datetime(end_yr, end_mnth, end_day)}}
TypeError: 'module' object is not callable
为什么?
答案 0 :(得分:5)
我找到了你的问题:
from datetime import datetime
import time
import datetime
让我们按顺序看一下:
在globals
中,您有一个名为datetime
的函数。然后,导入time
,一个模块对象。然后,导入datetime
,从而覆盖datetime
函数。这是一个例子:
>>> from datetime import datetime
>>> datetime(2015, 05, 26)
datetime.datetime(2015, 5, 26, 0, 0)
>>> import datetime
>>> datetime(2015, 05, 26)
Traceback (most recent call last):
File "<pyshell#24>", line 1, in <module>
datetime(2015, 05, 26)
TypeError: 'module' object is not callable
>>>
无论如何,即使您更改了顺序,也会覆盖某些内容,无论是函数还是模块对象。所以,只需重命名:
import datetime
import time
from datetime import datetime as dt