Why Length of values does not match length of index?

Question

Why I keep getting this error on Labels?

# Appending Clustered Labels
#neighborhoods_venues_sorted.insert(0, 'Cluster Labels', kmeans.labels_)
lahore_merged = df_data_0
# add clustering labels
lahore_merged['Labels'] = kmeans.labels_
lahore_merged = lahore_merged.join(neighborhoods_venues_sorted.set_index('Neighborhood'), on='Neighborhood')
lahore_merged.head() # check the last columns!

ValueError: Length of values does not match length of index

Answer 1

Complete error message would be useful but at a first look, it looks like the index of the lahore_merged and the length of kmeans.labels_ are different. Can you check that they are the same?