code: def do_run(command, args, three=None, python=False, pypi_mirror=None):
      
      from .cmdparse import ScriptEmptyError
  
      # Ensure that virtualenv is available.
      ensure_project(
          three=three, python=python, validate=False, pypi_mirror=pypi_mirror,
      )
  
      load_dot_env()
  
      previous_pip_shims_module = os.environ.pop("PIP_SHIMS_BASE_MODULE", None)
  
      # Activate virtualenv under the current interpreter's environment
      inline_activate_virtual_environment()
  
      # Set an environment variable, so we know we're in the environment.
      # Only set PIPENV_ACTIVE after finishing reading virtualenv_location
      # such as in inline_activate_virtual_environment
      # otherwise its value will be changed
      previous_pipenv_active_value = os.environ.get("PIPENV_ACTIVE")
      os.environ["PIPENV_ACTIVE"] = vistir.misc.fs_str("1")
  
      try:
          script = project.build_script(command, args)
          cmd_string = ' '.join([script.command] + script.args)
          if environments.is_verbose():
              click.echo(crayons.normal("$ {0}".format(cmd_string)), err=True)
      except ScriptEmptyError:
          click.echo("Can't run script {0!r}-it's empty?", err=True)
      run_args = [script]
      run_kwargs = {}
      if os.name == "nt":
          run_fn = do_run_nt
      else:
          run_fn = do_run_posix
          run_kwargs = {"command": command}
      try:
          run_fn(*run_args, **run_kwargs)
      finally:
          os.environ.pop("PIPENV_ACTIVE", None)
          if previous_pipenv_active_value is not None:
              os.environ["PIPENV_ACTIVE"] = previous_pipenv_active_value
          if previous_pip_shims_module is not None:
              os.environ["PIP_SHIMS_BASE_MODULE"] = previous_pip_shims_module
docs: Attempt to run command either pulling from project or interpreting as executable.
  
      Args are appended to the command in [scripts] section of project if found.