add syntax test for python client
add syntax test for python client

- better than nothing
- note that high-level behavior is already tested in various integration 
tests

cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata,cmu-delphi/delphi-epidata