python - Length mismatch: Expected axis has 218 elements, new values have 230 elements -


i have been accessing pandas data frame, , error keeps popping up.

cases_expand = []  case in cases_ii:     output = case[-1][0]     month = case[-1][1]     features = [v[0] v in case[0:-1]] + [month] + [output]     cases_expand.append(features)  feat = ["h_", "r_", "in_umiray_", "in_angat_", "out_nia_", "out_mwss_"]  cases_df2 = pd.dataframe(cases_expand)  col_names = [] f in feat:     if f != "out_nia_" , f != "out_mwss_":         in range(batch_size):             col_names.append(f+str(i+1))     else:         in range(look_back + batch_size):             col_names.append(f+str(i+1))  col_names += ["month", "output"]  #print (col_names) cases_df2.columns = col_names print (col_names)

the error is:

length mismatch: expected axis has 218 elements. new values has 230 elements.


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