pandas的表合并等操作【concat、join、merge】

https://blog.csdn.net/qq_41853758/article/details/83280104

1. 和【reduce】配合合并【多个】df

# 原生的merge只能合并两个
from functools import reduce
df_tables = [df1, df2, df3]
df_merge = reduce(lambda left, right: pd.merge(left, right, on=['D']), df_tables)