Execute the cmd command with Python

We can usually use the commands of the os module to execute cmd

Method 1: os. system

os.system( Executed commands )
#  Source code 
def system(*args, **kwargs): # real signature unknown
  """ Execute the command in a subshell. """
  pass

Method 2: os. popen (command executed)

os.popen( Executed commands )

#  Source code 
def popen(cmd, mode="r", buffering=-1):
  if not isinstance(cmd, str):
    raise TypeError("invalid cmd type (%s, expected string)" % type(cmd))
  if mode not in ("r", "w"):
    raise ValueError("invalid mode %r" % mode)
  if buffering == 0 or buffering is None:
    raise ValueError("popen() does not support unbuffered streams")
  import subprocess, io
  if mode == "r":
    proc = subprocess.Popen(cmd,
                shell=True,
                stdout=subprocess.PIPE,
                bufsize=buffering)
    return _wrap_close(io.TextIOWrapper(proc.stdout), proc)
  else:
    proc = subprocess.Popen(cmd,
                shell=True,
                stdin=subprocess.PIPE,
                bufsize=buffering)
    return _wrap_close(io.TextIOWrapper(proc.stdin), proc)

Difference between the two

system returns only what can be entered, where code 0 indicates successful execution. But we have no way to get the output information content popen can get the output information content, which is an object and can be read through. read ()

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