import Modules in python

import module

• 모든 함수를 import 하는 것은 비효율적입니다.

• 쓸 함수만 import 합니다.

• math — Mathematical functions
  math - Mathematical functions - Python 3.9.0 documentation

• datetime — Basic date and time types : 자주쓰는 모듈
  datetime - Basic date and time types - Python 3.9.0 documentation

• CSV File Reading and Writing
  csv - CSV File Reading and Writing - Python 3.9.0 documentation

• json — JSON encoder and decoder
  json - JSON encoder and decoder - Python 3.9.0 documentation