Why am I getting value error when trying to convert it as float? There are no commas in the numbers.
vol
volume
date
2012-12-03 4.923456e+07
2012-12-04 5.518025e+08
2012-12-05 6.937129e+07
2012-12-06 6.814400e+07
2012-12-07 6.438596e+07
... ...
2014-04-02 6.344194e+07
2014-05-02 6.544194e+07
vol.astype(float)
ValueError: could not convert string to float: