python之"type object ' datetime.datetime ' has no attribute ' datetime '"即使是"import datetime"

我检查过，没有“意外”重新导入。我检查了我的 AppEngine 日志，它在 2 天前才开始发生。

我使用的是 2.7 运行时。

编辑:这是导致错误的行(注意我使用的是 import datetime，而不是 from datetime import datetime)

task.due_at = datetime.datetime.strptime(date, '%Y-%m-%d %I:%M%p') 

编辑:堆栈跟踪

type object 'datetime.datetime' has no attribute 'datetime' 
Traceback (most recent call last): 
  File "/base/data/home/runtimes/python27/python27_lib/versions/third_party/webapp2-2.5.1/webapp2.py", line 570, in dispatch 
    return method(*args, **kwargs) 
  File "/base/data/home/apps/s~wmphighrise/1.373696587983821954/myapp/handler/decorators.py", line 22, in wrapper 
    return fn(*args, **kwargs) 
  File "/base/data/home/apps/s~wmphighrise/1.373696587983821954/myapp/handler/api/main.py", line 1343, in post 
    task.due_at = datetime.datetime.strptime(date, '%Y-%m-%d %I:%M%p') 
AttributeError: type object 'datetime.datetime' has no attribute 'datetime' 

编辑 3:一些调试

注意:import datetime在最上面

#1st attempt 
import datetime 
class MyHandler(): 
  def get(self): 
    logging.info(datetime) # => "<type 'datetime.datetime'>" 
 
#2nd attempt 
import datetime 
class MyHandler(): 
  def get(self): 
    import datetime  # explicitly re-import the module 
    logging.info(datetime) # => "<module 'datetime' (built-in)>" 
 
#3rd attempt 
import datetime 
class MyHandler(): 
  def get(self): 
    logging.info(datetime) # => Throws UnboundLocalError: local variable 'datetime' referenced before assignment 
                           # Is this normal? This is new to me. 
    import datetime 
    logging.info(datetime) 
 
#4th attempt 
import datetime 
logging.info(datetime) # => "<module 'datetime' (built-in)>" 
class MyHandler(): 
  def get(self): 
    logging.info(datetime) # => "<type 'datetime.datetime'>" 

有没有办法在当前文件或模块之外重新定义变量？因为我已经查看并查看了这个文件，根本没有重新定义。

编辑 4:

我已经ack了"datetime =", "datetime=", "datetime.datetime =" 和 "datetime.datetime="，但没有重新分配的结果。我检查了过去 2 天的 git 日志，没有任何可以引入它的更改