old_contents: import subprocess
  from subprocess import Popen as pop
  
  
  def Popen(*args, **kwargs):
      print('hi')
  
      def __len__(self):
          return 0
  
  pop('/bin/gcc --version', shell=True)
  Popen('/bin/gcc --version', shell=True)
  
  subprocess.Popen('/bin/gcc --version', shell=True)
  subprocess.Popen(['/bin/gcc', '--version'], shell=False)
  subprocess.Popen(['/bin/gcc', '--version'])
  
  subprocess.call(["/bin/ls",
                   "-l"
                   ])
  subprocess.call('/bin/ls -l', shell=True)
  
  subprocess.check_call(['/bin/ls', '-l'], shell=False)
  subprocess.check_call('/bin/ls -l', shell=True)
  
  subprocess.check_output(['/bin/ls', '-l'])
  subprocess.check_output('/bin/ls -l', shell=True)
  
  subprocess.Popen('/bin/ls *', shell=True)
  subprocess.Popen('/bin/ls %s' % ('something',), shell=True)
  subprocess.Popen('/bin/ls {}'.format('something'), shell=True)
  
  command = "/bin/ls" + unknown_function()
  subprocess.Popen(command, shell=True)
  
  subprocess.Popen('/bin/ls && cat /etc/passwd', shell=True)
  
  # Issue #157
  command = 'pwd'
  subprocess.call(command, shell='True')
  subprocess.call(command, shell='False')
  subprocess.call(command, shell='None')
  subprocess.call(command, shell=1)
  
  subprocess.call(command, shell=Popen())
  subprocess.call(command, shell=[True])
  subprocess.call(command, shell={'IS': 'True'})
  subprocess.call(command, shell=command)
  
  subprocess.call(command, shell=False)
  subprocess.call(command, shell=0)
  subprocess.call(command, shell=[])
  subprocess.call(command, shell={})
  subprocess.call(command, shell=None)
  
new_contents: import subprocess
  from subprocess import Popen as pop
  
  
  def Popen(*args, **kwargs):
      print('hi')
  
      def __len__(self):
          return 0
  
  pop('/bin/gcc --version', shell=True)
  Popen('/bin/gcc --version', shell=True)
  
  subprocess.Popen('/bin/gcc --version', shell=True)
  subprocess.Popen(['/bin/gcc', '--version'], shell=False)
  subprocess.Popen(['/bin/gcc', '--version'])
  
  subprocess.call(["/bin/ls",
                   "-l"
                   ])
  subprocess.call('/bin/ls -l', shell=True)
  
  subprocess.check_call(['/bin/ls', '-l'], shell=False)
  subprocess.check_call('/bin/ls -l', shell=True)
  
  subprocess.check_output(['/bin/ls', '-l'])
  subprocess.check_output('/bin/ls -l', shell=True)
  
  subprocess.Popen('/bin/ls *', shell=True)
  subprocess.Popen('/bin/ls %s' % ('something',), shell=True)
  subprocess.Popen('/bin/ls {}'.format('something'), shell=True)
  
  command = "/bin/ls" + unknown_function()
  subprocess.Popen(command, shell=True)
  
  subprocess.Popen('/bin/ls && cat /etc/passwd', shell=True)
  
  command = 'pwd'
  subprocess.call(command, shell='True')
  subprocess.call(command, shell='False')
  subprocess.call(command, shell='None')
  subprocess.call(command, shell=1)
  
  subprocess.call(command, shell=Popen())
  subprocess.call(command, shell=[True])
  subprocess.call(command, shell={'IS': 'True'})
  subprocess.call(command, shell=command)
  
  subprocess.call(command, shell=False)
  subprocess.call(command, shell=0)
  subprocess.call(command, shell=[])
  subprocess.call(command, shell={})
  subprocess.call(command, shell=None)
  
subject: Remove issue comment