Error message from the code: 
plot_potential_extrapolation_of_hmi_fits_file 
========================================================== 
Traceback (most recent call last):

  File "C:\Users\Mohamed Nedal\Anaconda3\lib\site-packages\IPython\core\interactiveshell.py", line 3319, in run_code
    exec(code_obj, self.user_global_ns, self.user_ns)

  File "<ipython-input-1-98edc513c9e6>", line 5, in <module>
    from mayavi import mlab

  File "C:\Users\Mohamed Nedal\Anaconda3\lib\site-packages\mayavi\mlab.py", line 15, in <module>
    from mayavi.core.common import process_ui_events

  File "C:\Users\Mohamed Nedal\Anaconda3\lib\site-packages\mayavi\core\common.py", line 16, in <module>
    from apptools.persistence.state_pickler import create_instance

  File "C:\Users\Mohamed Nedal\Anaconda3\lib\site-packages\apptools\persistence\state_pickler.py", line 1210
    
    ^
SyntaxError: invalid syntax