Jupyter Notebook安装库失败，报[WinError 2]文件未找到错误

在Jupyter Notebook中执行pip install ffprobe时，出现如下错误：

---------------------------------------------------------------------------
FileNotFoundError                         Traceback (most recent call last)
~\AppData\Local\Temp\ipykernel_19512\1427077936.py in <module>
----> 1 get_ipython().run_line_magic('conda', 'install -c travis ffprobe')

~\anaconda3\lib\site-packages\IPython\core\interactiveshell.py in run_line_magic(self, magic_name, line, _stack_depth)
   2362                 kwargs['local_ns'] = self.get_local_scope(stack_depth)
   2363             with self.builtin_trap:
-> 2364                 result = fn(*args, **kwargs)
   2365             return result
   2366 

~\anaconda3\lib\site-packages\decorator.py in fun(*args, **kw)
    230             if not kwsyntax:
    231                 args, kw = fix(args, kw, sig)
-> 232             return caller(func, *(extras + args), **kw)
    233     fun.__name__ = func.__name__
    234     fun.__doc__ = func.__doc__

~\anaconda3\lib\site-packages\IPython\core\magic.py in <lambda>(f, *a, **k)
    185     # but it's overkill for just that one bit of state.
    186     def magic_deco(arg):
-> 187         call = lambda f, *a, **k: f(*a, **k)
    188 
    189         if callable(arg):

~\anaconda3\lib\site-packages\IPython\core\magics\packaging.py in conda(self, line)
    107             extra_args.extend(["--prefix", sys.prefix])
    108 
-> 109         self.shell.system(' '.join([conda, command] + extra_args + args))
    110         print("\nNote: you may need to restart the kernel to use updated packages.")

~\anaconda3\lib\site-packages\ipykernel\zmqshell.py in system_piped(self, cmd)
    629                 if path is not None:
    630                     cmd = "pushd %s &&%s" % (path, cmd)
-> 631                 self.user_ns["_exit_code"] = system(cmd)
    632         else:
    633             self.user_ns["_exit_code"] = system(self.var_expand(cmd, depth=1))

~\anaconda3\lib\site-packages\IPython\utils\_process_win32.py in system(cmd)
    143         if path is not None:
    144             cmd = '"pushd %s &&"%s' % (path, cmd)
-> 145         return process_handler(cmd, _system_body)
    146 
    147 def getoutput(cmd):

~\anaconda3\lib\site-packages\IPython\utils\_process_common.py in process_handler(cmd, callback, stderr)
     77     if shell and os.name == 'posix' and 'SHELL' in os.environ:
     78         executable = os.environ['SHELL']
-> 79     p = subprocess.Popen(cmd, shell=shell,
     80                          executable=executable,
     81                          stdin=subprocess.PIPE,

~\anaconda3\lib\site-packages\subprocess.py in __init__(self, args, bufsize, executable, stdin, stdout, stderr, preexec_fn, close_fds, shell, cwd, env, universal_newlines, startupinfo, creationflags, restore_signals, start_new_session, pass_fds, user, group, extra_groups, encoding, errors, text, umask)
    949                             encoding=encoding, errors=errors)
    950 
-> 951             self._execute_child(args, executable, preexec_fn, close_fds,
    952                                 pass_fds, cwd, env,
    953                                 startupinfo, creationflags, shell,

~\anaconda3\lib\site-packages\subprocess.py in _execute_child(self, args, executable, preexec_fn, close_fds, pass_fds, cwd, env, startupinfo, creationflags, shell, p2cread, p2cwrite, c2pread, c2pwrite, errread, errwrite, unused_restore_signals, unused_gid, unused_gids, unused_uid, unused_umask, unused_start_new_session)
   1418             # Start the process
   1419             try:
-> 1420                 hp, ht, pid, tid = _winapi.CreateProcess(executable, args,
   1421                                          # no special security
   1422                                          None, None,

FileNotFoundError: [WinError 2] The system cannot find the file specified

我尝试过以下方法，但都没能解决问题：

• 执行pip install ffprobe-python --user，仍出现相同错误
• 执行pip install --upgrade pip升级pip，无效
• 检查anaconda3/share/jupyter/python3路径下的kernel.json文件，未发现异常
• 修改subprocess.py的__init__函数，将shell参数设为True，问题依旧
• 尝试%conda install -c travis ffprobe，仍出现相同错误

我是新手，若需要更多信息请告知，非常感谢您的帮助。

内容的提问来源于stack exchange，提问作者worstusername