"Key Error 1"

[Pazoles]

..."File "/Users/pazoles/Development/Geocoder/app.py", line 15, in geo_post
result = geocode(file_contents)
File "/Users/pazoles/Development/Geocoder/census_geo.py", line 33, in geocode
df['latitude'] = df['lonlat'].str.split(',', expand=True)[1]
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/core/frame.py", line 1992, in getitem
return self._getitem_column(key)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/core/frame.py", line 1999, in _getitem_column
return self._get_item_cache(key)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/core/generic.py", line 1345, in _get_item_cache
values = self._data.get(item)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/core/internals.py", line 3225, in get
loc = self.items.get_loc(item)
File "/Library/Frameworks/Python.framework/Versions/3.5/lib/python3.5/site-packages/pandas/indexes/base.py", line 1878, in get_loc
return self._engine.get_loc(self._maybe_cast_indexer(key))
File "pandas/index.pyx", line 137, in pandas.index.IndexEngine.get_loc (pandas/index.c:4027)

File "pandas/index.pyx", line 157, in pandas.index.IndexEngine.get_loc (pandas/index.c:3891)

File "pandas/hashtable.pyx", line 303, in pandas.hashtable.Int64HashTable.get_item (pandas/hashtable.c:6527)

File "pandas/hashtable.pyx", line 309, in pandas.hashtable.Int64HashTable.get_item (pandas/hashtable.c:6465)

KeyError: 1
"

Current result of uploading a file for geocoding.