python - Intersection of pandas dataframe with multiple columns -


i have list of dataframes as:

[df1, df2, df3, ..., df100, odddf]

each dataframe dfi has datetime column1 , temperature column2. except dataframe odddf has datetime column1 , has temperature columns in column2 , column3.

i looking create list of dataframe or 1 dataframe has common temperatures each of df1, .. df100 , odddf

i trying following:

dfs = [df0, df1, df2, .., df100, odddf] df_final = reduce(lambda left,right: pd.merge(left,right,on='datetime'), dfs)

but produces df_final empty

if just:

dfs = [df0, df1, df2, .., df100] df_final = reduce(lambda left,right: pd.merge(left,right,on='datetime'), dfs)

df_final produces right answer.

how incorporate odddf in code also. have checked make sure odddf's datetime column has common dates 

df1, df2, .., df100


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