- sys 도 import 해야하는 모듈입니다. 파이썬은 sys 모듈의 위치를 어떻게 찾을 수 있을까요?
sys 도 import 해야하는 모듈 이므로
sys 모듈을 import 해서 sys.modules 와 sys.path를 출력할수 있고 수정할수 있다.
import sys
print(sys.path)# list
>>['/Users/jeonghyeonhwang/Desktop/study/algorith', '/Users/jeonghyeonhwang/Desktop/study/algorith', '/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_display', '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python38.zip', '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8', '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/lib-dynload', '/Users/jeonghyeonhwang/Desktop/study/algorith/venv/lib/python3.8/site-packages', '/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_matplotlib_backend']
print(sys.modules) # dict
>>{'sys': <module 'sys' (built-in)>, 'builtins': <module 'builtins' (built-in)>, '_frozen_importlib': <module 'importlib._bootstrap' (frozen)>, '_imp': <module '_imp' (built-in)>, '_warnings': <module '_warnings' (built-in)>, '_frozen_importlib_external': <module 'importlib._bootstrap_external' (frozen)>, '_io': <module 'io' (built-in)>, 'marshal': <module 'marshal' (built-in)>, 'posix': <module 'posix' (built-in)>, '_thread': <module '_thread' (built-in)>, '_weakref': <module '_weakref' (built-in)>, 'time': <module 'time' (built-in)>, 'zipimport': <module 'zipimport' (frozen)>, '_codecs': <module '_codecs' (built-in)>, 'codecs': <module 'codecs' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/codecs.py'>, 'encodings.aliases': <module 'encodings.aliases' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/encodings/aliases.py'>, 'encodings.cp437': <module 'encodings.cp437' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/encodings/cp437.py'>, 'encodings': <module 'encodings' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/encodings/__init__.py'>, 'encodings.utf_8': <module 'encodings.utf_8' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/encodings/utf_8.py'>, '_signal': <module '_signal' (built-in)>, '__main__': <module '__main__' from '/Users/jeonghyeonhwang/Desktop/study/algorith/1.py'>, 'encodings.latin_1': <module 'encodings.latin_1' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/encodings/latin_1.py'>, '_abc': <module '_abc' (built-in)>, 'abc': <module 'abc' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/abc.py'>, 'io': <module 'io' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/io.py'>, '_stat': <module '_stat' (built-in)>, 'stat': <module 'stat' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/stat.py'>, '_collections_abc': <module '_collections_abc' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/_collections_abc.py'>, 'genericpath': <module 'genericpath' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/genericpath.py'>, 'posixpath': <module 'posixpath' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/posixpath.py'>, 'os.path': <module 'posixpath' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/posixpath.py'>, 'os': <module 'os' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/os.py'>, '_sitebuiltins': <module '_sitebuiltins' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/_sitebuiltins.py'>, '_locale': <module '_locale' (built-in)>, '_bootlocale': <module '_bootlocale' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/_bootlocale.py'>, '_operator': <module '_operator' (built-in)>, 'operator': <module 'operator' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/operator.py'>, 'keyword': <module 'keyword' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/keyword.py'>, '_heapq': <module '_heapq' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/lib-dynload/_heapq.cpython-38-darwin.so'>, 'heapq': <module 'heapq' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/heapq.py'>, 'itertools': <module 'itertools' (built-in)>, 'reprlib': <module 'reprlib' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/reprlib.py'>, '_collections': <module '_collections' (built-in)>, 'collections': <module 'collections' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/collections/__init__.py'>, '_functools': <module '_functools' (built-in)>, 'functools': <module 'functools' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/functools.py'>, 'importlib._bootstrap': <module 'importlib._bootstrap' (frozen)>, 'importlib._bootstrap_external': <module 'importlib._bootstrap_external' (frozen)>, 'types': <module 'types' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/types.py'>, 'warnings': <module 'warnings' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/warnings.py'>, 'importlib': <module 'importlib' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/__init__.py'>, 'importlib.machinery': <module 'importlib.machinery' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/machinery.py'>, 'importlib.abc': <module 'importlib.abc' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/abc.py'>, 'contextlib': <module 'contextlib' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/contextlib.py'>, 'importlib.util': <module 'importlib.util' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/importlib/util.py'>, '_virtualenv': <module '_virtualenv' from '/Users/jeonghyeonhwang/Desktop/study/algorith/venv/lib/python3.8/site-packages/_virtualenv.py'>, 'enum': <module 'enum' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/enum.py'>, '_sre': <module '_sre' (built-in)>, 'sre_constants': <module 'sre_constants' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/sre_constants.py'>, 'sre_parse': <module 'sre_parse' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/sre_parse.py'>, 'sre_compile': <module 'sre_compile' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/sre_compile.py'>, 'copyreg': <module 'copyreg' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/copyreg.py'>, 're': <module 're' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/re.py'>, 'token': <module 'token' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/token.py'>, 'tokenize': <module 'tokenize' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/tokenize.py'>, 'linecache': <module 'linecache' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/linecache.py'>, 'traceback': <module 'traceback' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/traceback.py'>, 'sitecustomize': <module 'sitecustomize' from '/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_matplotlib_backend/sitecustomize.py'>, 'site': <module 'site' from '/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.8/lib/python3.8/site.py'>}위와 같이 print를 해보면 'sys': <module 'sys' (built-in) 에서 sys 모듈은 built-in 모듈에 포함되어 있는것을 확인할수있다.
