[英]how to merge two data frames based on particular column in pandas python?
I have to merge two dataframes:我必须合并两个数据框:
df1 df1
company,standard
tata,A1
cts,A2
dell,A3
df2 df2
company,return
tata,71
dell,78
cts,27
hcl,23
I have to unify both dataframes to one dataframe.我必须将两个数据帧统一为一个数据帧。 I need output like:我需要这样的输出:
company,standard,return
tata,A1,71
cts,A2,27
dell,A3,78
我想我们也可以使用 df1.merge(df2,on='Company')
In order to successfully merge two data frames based on common column(s), the dtype for common column(s) in both data frames must be the same!为了基于公共列成功合并两个数据框,两个数据框中公共列的 dtype 必须相同! dtype for a column can be changed by:列的 dtype 可以通过以下方式更改:
df['commonCol'] = df['commonCol'].astype(int)
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