Don't assume df_barcodes has empty column #267
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Fixes #266
Wraps the drop statement in a conditional, so that a KeyError isn't raised if the dataframe doesn't have a column named ''.
Alternatively, the
pandas.DataFrame.drop
function has anerrors
parameter which can be set toignore
so that an error isn't raised when attempting to drop a non-existant column, but that seems like it could cause some headaches in the future.