new_contents: #!/usr/bin/env python
  import platform
  import shutil
  import subprocess
  import sys
  
  from os.path import dirname, isdir, join as join_path
  
  file_path = dirname(__file__)
  requirements_path = '/'.join(file_path.split('/')[:-1]) + "/requirements"
  root_path = file_path.split('/')[:-2]
  root_path = '/'.join(root_path)
  
  
  class VirtualEnvironmentBuilder(object):
      def __init__(self, virt_env_name):
          self.virt_env_name = virt_env_name
  
      @property
      def virt_env_path(self):
          print(join_path(root_path, self.virt_env_name))
          return join_path(root_path, self.virt_env_name)
  
      @property
      def virt_env_path(self):
          return root_path + "/" + self.virt_env_name
  
      def clean_build(self):
          self.delete_env()
          self.build()
  
      def build(self):
          # Create a fresh virtual environment if it doesn't exist
          self.create_venv()
  
          try:
              print(requirements_path)
              self.run_in_venv('pip', ['install', '-r', requirements_path])
          except Exception:
              print("Erorrrr")
              self.delete_env()
  
  
      def create_venv(self):
          if isdir(self.virt_env_path):
              return
          print(self.virt_env_path)
          try:
              subprocess.check_call([sys.executable, '-m', 'virtualenv', self.virt_env_path, '--no-site-packages'])
          except Exception:
              print("Something is wrong!")
              self.delete_env()
          if isdir(self.virt_env_name):
              print("Environment {} created".format(self.virt_env_path))
  
      def delete_env(self):
          print("Deleting env!")
          try:
              if isdir(self.virt_env_path):
                  shutil.rmtree(self.virt_env_path)
          except Exception:
              print("Could not delete environment!")
  
      def run_in_venv(self, cmd, args):
          virtual_env_bin_path = self.virt_env_path
          if platform.system() == 'Windows':
              cmd += '.exe'
              virtual_env_bin_path += r'\Scripts'
          else:
              virtual_env_bin_path += r'/bin'
          print("here")
          print(virtual_env_bin_path)
          print(cmd)
          a = join_path[virtual_env_bin_path, cmd]
          print(a)
          subprocess.check_call(join_path[file_path, virtual_env_bin_path, cmd] + args)
  
  
  if __name__ == '__main__':
      builder = VirtualEnvironmentBuilder('hack33-virtenv')
      builder.build()
  
subject: Create virtual builder for windows OS