Geocode variable type error

[iammattlee]

When running flow_data_processing.py, the script encounters an error with the s1 and s2 variables in S03_geocode_and_match_street_number.py as shown below:

Traceback (most recent call last):
  File "flow_data_processing.py", line 110, in <module>
    newmatch = pfd.arterycode_matching() ## comment this line out to skip arterycode matching process
  File "flow_data_processing.py", line 39, in arterycode_matching
    S03.geocode_match(self.db)
  File "./flow_data_processing/arterycode_mapping/S03_geocode_and_match_street_number.py", line 232, in geocode_match
    results.append(geocode_points(db))
  File "./flow_data_processing/arterycode_mapping/S03_geocode_and_match_street_number.py", line 151, in geocode_points
    f = Geocode(db,ac,s1,s2)
  File "./flow_data_processing/arterycode_mapping/S03_geocode_and_match_street_number.py", line 29, in Geocode
    (add,lat,lon) = AF.geocode(s1+' and '+s2)
TypeError: must be str, not NoneType