example error

[hsoni0303]

Error during run of example keystroke.py

Traceback (most recent call last):
File "keystroke.py", line 217, in
verification(df)
File "keystroke.py", line 179, in verification
pohmm.fit_df(train)
File "/home/hsoni0303/.local/lib/python3.6/site-packages/pohmm/pohmm.py", line 864, in fit_df
obs = [df[df.columns.difference([pstate_col])][obs_cols].values for df in dfs]
File "/home/hsoni0303/.local/lib/python3.6/site-packages/pohmm/pohmm.py", line 864, in
obs = [df[df.columns.difference([pstate_col])][obs_cols].values for df in dfs]
File "/home/hsoni0303/.local/lib/python3.6/site-packages/pandas/core/frame.py", line 2133, in getitem
return self._getitem_array(key)
File "/home/hsoni0303/.local/lib/python3.6/site-packages/pandas/core/frame.py", line 2177, in _getitem_array
indexer = self.loc._convert_to_indexer(key, axis=1)
File "/home/hsoni0303/.local/lib/python3.6/site-packages/pandas/core/indexing.py", line 1269, in _convert_to_indexer
.format(mask=objarr[mask]))
KeyError: '[0 1] not in index'

[zcmail]

I had the same error.I solved it in this way:
replace the code 'df[df.columns.difference([pstate_col])][obs_cols].values' in pohmm.py with 'df[df.columns.difference([pstate_col])][['tau', 'duration']].values' when run keystroke.py.There are five.