Python Pandas合并键错误

Question

为什么以下因KeyError'NUM'而失败？

result = pandas.merge(sdf_subset, dfgeom, how='inner', on=['ID', 'NUM'])

列'ID'存在于sdf_subset中,'NUM'存在于dfgeom中.我检查了数据类型,两者都是Int64.

有任何想法吗？

Answer 1

# you need to use left_on and right_on if the joining key is different between the dataframes.
result = pandas.merge(sdf_subset, dfgeom, how='inner', left_on='ID', right_on='NUM')