[Python] 파이썬 BeautifulSoup 설치 오류시 해결 방법 : os.system(), pip install beautifulsoup4

import 문에 빨간줄이 표시가되어 마우스를 올렸다.

BeautifulSoup 모듈을 사용하기위해서는 패키지를 설치해야한다.  클릭하여 자동설치를 시작하였으나 바로 오류가 터졌다.

Collecting BeautifulSoup
  Downloading BeautifulSoup-3.2.2.tar.gz (32 kB)

DEPRECATION: The -b/--build/--build-dir/--build-directory option is deprecated. pip 20.3 will remove support for this functionality. A possible replacement is use the TMPDIR/TEMP/TMP environment variable, possibly combined with --no-clean. You can find discussion regarding this at https://github.com/pypa/pip/issues/8333.
    ERROR: Command errored out with exit status 1:
     command: 'C:UsersilikeAppDataLocalProgramsPythonPython39python.exe' -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'C:UsersilikeAppDataLocalTemppycharm-packagingbeautifulsoupsetup.py'"'"'; __file__='"'"'C:UsersilikeAppDataLocalTemppycharm-packagingbeautifulsoupsetup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'rn'"'"', '"'"'n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base 'C:UsersilikeAppDataLocalTemppip-pip-egg-info-72zafi1p'
         cwd: C:UsersilikeAppDataLocalTemppycharm-packagingbeautifulsoup
    Complete output (6 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "C:UsersilikeAppDataLocalTemppycharm-packagingbeautifulsoupsetup.py", line 3
        "You're trying to run a very old release of Beautiful Soup under Python 3. This will not work."<>"Please use Beautiful Soup 4, available through the pip package 'beautifulsoup4'."
                                                                                                       ^
    SyntaxError: invalid syntax
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.
WARNING: You are using pip version 20.2.3; however, version 20.3.1 is available.
You should consider upgrading via the 'C:UsersilikeAppDataLocalProgramsPythonPython39python.exe -m pip install --upgrade pip' command.

[해결방법] 명령프롬프트(cmd) 창을 열고  pip 업그레이드 명령을 쳐서 업그레이드를 먼저 진행했다.

python.exe -m pip install --upgrade pip

Microsoft Windows [Version 10.0.19042.685]
(c) 2020 Microsoft Corporation. All rights reserved.

C:Usersilike>python.exe -m pip install --upgrade pip
Collecting pip
  Downloading pip-20.3.1-py2.py3-none-any.whl (1.5 MB)
     |████████████████████████████████| 1.5 MB 6.4 MB/s
Installing collected packages: pip
  Attempting uninstall: pip
    Found existing installation: pip 20.2.3
    Uninstalling pip-20.2.3:
      Successfully uninstalled pip-20.2.3
Successfully installed pip-20.3.1

C:Usersilike>

하지만 안타깝게도 파이썬3에서는 BeautifulSoup-3.2.2.버전을 사용할 수 없다. BeautifulSoup 4를 사용해야한다. 

설치방법은 터미널창을 열거나 명령프롬프트를 열고 pip install beautifulsoup4 명령어를 실행하면 된다.

C:pythonWorkspace>
C:pythonWorkspace>pip install beautifulsoup4
Collecting beautifulsoup4
  Downloading beautifulsoup4-4.9.3-py3-none-any.whl (115 kB)
     |████████████████████████████████| 115 kB 6.8 MB/s
Collecting soupsieve>1.2
  Downloading soupsieve-2.0.1-py3-none-any.whl (32 kB)
Installing collected packages: soupsieve, beautifulsoup4
Successfully installed beautifulsoup4-4.9.3 soupsieve-2.0.1

C:pythonWorkspace>

또다른 설치 방법은 os모듈을 import 후 os.system()함수를 사용하여 명령어를 실행할 수 있다.

>>> import os
>>>
>>> os.system("pip install beautifulsoup4")
Requirement already satisfied: beautifulsoup4 in c:usersilikeappdatalocalprogramspythonpython39libsite-packages (4.9.3)
Requirement already satisfied: soupsieve>1.2 in c:usersilikeappdatalocalprogramspythonpython39libsite-packages (from beautifulsoup4) (2.0.1)
>>>
>>>

마지막으로 import 해야하는 모듈이 변경되었다.

AS-IS

import requests, BeautifulSoup

TO-BE

from bs4 import BeautifulSoup

[REFERENCE]

stackoverflow.com/questions/19957194/install-beautiful-soup-using-pip

[Python BeautifulSoup tutorial]

zetcode.com/python/beautifulsoup/