ValueError: The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all(). site:stackoverflow.com
Well pandas use bitwise & | and each condition should be wrapped in a ()
For example following works
data_query = data[(data['year'] >= 2005) & (data['year'] <= 2010)]
But the same query without proper brackets does not
data_query = data[(data['year'] >= 2005 & data['year'] <= 2010)]The truth value of a Series is ambiguous. Use a.empty, a.bool(), a.item(), a.any() or a.all().
#Python pandas
#This NOT works
result = result[(result['var'] > 0.25) or (result['var'] < -0.25)]
#This works
result = result[(result['var']>0.25) | (result['var']<-0.25)]
==> Use: & (and), | (or)Copyright © 2021 Codeinu
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