execfile
=========

.. currentmodule:: casashell


.. function:: execfile(filename, globals=globals())

   Execute file

   Parameters
      - **filename** (*string*) - name of file to execute
      - **globals** (*dictionary*) - the environment for evaluation

   Description
      Python 3 removed the ``execfile`` builtin function. CASA provides a convenience function that
      attempts to reproduce the behavior of the Python 2.7 builtin ``execfile`` function.

      ``execfile`` evaluates contents of ``filename`` in the environment specified by ``globals``.


      When ``execfile`` is used within the ``filename`` being evaluated, it is necessary to add
      ``globals( )`` as the second argument to those execfile calls in order for the secondary
      script to know about the global variables of the calling script. For example, within a script
      ‘mainscript.py’, calls to another script ‘myscript.py’ should be written as
      ``execfile(‘myscript.py’, globals())``.