PEP 08 states:
Imports are always put at the top of the file, just after any module comments and docstrings, and before module globals and constants.
However if the class/method/function that I am importing is only used in rare cases, surely it is more efficient to do the import when it is needed?
class SomeClass(object): def not_often_called(self) from datetime import datetime self.datetime = datetime.now()
more efficient than this?
from datetime import datetime class SomeClass(object): def not_often_called(self) self.datetime = datetime.now()