熊猫合并返回空数据框

Question

I am merging the following 2 dataframes on a common column:

URL for df_a: [https://www.dropbox.com/s/6rmymbpomp2b1nd/df_a.csv?dl=0][1] URL for df_b: [https://www.dropbox.com/s/67713f3y8omvuru/df_b.csv?dl=0][1]

pandas.merge(df_a, df_b, on='County')

returns an empty dataframe, even though there are common county values in the 2 dataframes. any suggestions on what to do?

Answer 1

Your counties in df_b all have trailing space. You can correct this with

df_b.County = [c.strip() for c in df_b.County]

The merge works after this.