ModuleNotFoundError: No module named 'numpy'

NumPy("넘파이"라 읽는다)는 행렬이나 일반적으로 대규모 다차원 배열을 쉽게 처리 할 수 있도록 지원하는 파이썬의 라이브러리이다. NumPy는 데이터 구조 외에도 수치 계산을 위해 효율적으로 구현된 기능을 제공한다.

 

https://ko.wikipedia.org/wiki/NumPy

NumPy - 위키백과, 우리 모두의 백과사전

 

numpy가 없어 이와 같은 에러가 발생하면 설치하자.

 

$ python3 ./test.py 
Traceback (most recent call last):
  File "./test.py", line 7, in <module>
    import numpy as np
ModuleNotFoundError: No module named 'numpy'
$ pip install numpy
Collecting numpy
  Downloading numpy-1.21.3-cp38-cp38-manylinux_2_12_x86_64.manylinux2010_x86_64.whl (15.7 MB)
     |████████████████████████████████| 15.7 MB 14.1 MB/s 
Installing collected packages: numpy
  WARNING: The scripts f2py, f2py3 and f2py3.8 are installed in '/home/dev/.local/bin' which is not on PATH.
  Consider adding this directory to PATH or, if you prefer to suppress this warning, use --no-warn-script-location.
Successfully installed numpy-1.21.3
$