requests설치를 하면 제대로 나오지 않고 이렇게 나옵니다. 왜그런지 모르겠어요..

작성한 코드 및 에러 메세지

다은@daeun MINGW64 ~/Desktop/sparta/pythonprac
$ source c:/Users/다은/Desktop/sparta/pythonprac/venv/Scripts/activate
(venv) 
다은@daeun MINGW64 ~/Desktop/sparta/pythonprac
$ c:/Users/다은/Desktop/sparta/pythonprac/venv/Scripts/python.exe c:/Users/다은/Desktop/sparta/pythonprac/hello.py
청소년입니다
청소년입니다
성인입니다  
성인입니다  
성인입니다  
청소년입니다
(venv) 
다은@daeun MINGW64 ~/Desktop/sparta/pythonprac
$ pip install requests
ERROR: Exception:
Traceback (most recent call last):
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\cli\base_command.py", 
line 216, in _main
    status = self.run(options, args)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\cli\req_command.py", line 182, in wrapper
    return func(self, options, args)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\commands\install.py", 
line 324, in run
    requirement_set = resolver.resolve(
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 183, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 388, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 331, in _get_abstract_dist_for
    skip_reason = self._check_skip_installed(req)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\resolution\legacy\resolver.py", line 236, in _check_skip_installed
    req_to_install.check_if_exists(self.use_user_site)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\req\req_install.py", line 432, in check_if_exists
    existing_dist = get_distribution(self.req.name)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\misc.py", line 501, in get_distribution
    dist = search_distribution(req_name)
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\misc.py", line 492, in search_distribution
    packages = get_installed_distributions(skip=())
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\misc.py", line 477, in get_installed_distributions
    return [d for d in working_set
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\misc.py", line 478, in <listcomp>
66, in dist_location
    egg_link = egg_link_path(dist)                                                                         86, in dist_is_local
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\misc.py", line 542, in egg_link_path                                                                                       66, in dist_location
    if not virtualenv_no_global() and user_site:
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\virtualenv.py", 42, in egg_link_path
line 111, in virtualenv_no_global
    return _no_global_under_venv()                                                                         line 111, in virtualenv_no_global
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\virtualenv.py", 
line 72, in _no_global_under_venv                                                                          line 72, in _no_global_under_venv
    cfg_lines = _get_pyvenv_cfg_lines()
  File "c:\users\다은\desktop\sparta\pythonprac\venv\lib\site-packages\pip\_internal\utils\virtualenv.py", line 55, in _get_pyvenv_cfg_lines
line 55, in _get_pyvenv_cfg_lines
    return f.read().splitlines()  # avoids trailing newlines
UnicodeDecodeError: 'cp949' codec can't decode byte 0xeb in position 16: illegal multibyte sequence        
(venv)
다은@daeun MINGW64 ~/Desktop/sparta/pythonprac                                                             ello.py
$ c:/Users/다은/Desktop/sparta/pythonprac/venv/Scripts/python.exe c:/Users/다은/Desktop/sparta/pythonprac/hello.py
청소년입니다
청소년입니다
성인입니다
성인입니다
성인입니다
청소년입니다
Traceback (most recent call last):
  File "c:/Users/다은/Desktop/sparta/pythonprac/hello.py", line 9, in <module>
    print(json)
NameError: name 'json' is not defined
(venv)
다은@daeun MINGW64 ~/Desktop/sparta/pythonprac
$