没有得到完全结果的熊猫

Question

df=pandas.DataFrame(processed_data_format, columns=["file_name", "innings", "over","ball", "individual ball", "runs","batsman", "wicket_status","bowler_name","fielder_name"])      
a = {'runs':['sum'],'ball':['sum'],'file_name':['unique']}
t = df.groupby('batsman').agg(a)

运行此代码后，我得到的结果如

['Younis Khan', array(['225245', '225247'], dtype=object), 113, 121]

但我希望得到像

这样的结果

['Younis Khan', 2 , 113, 121]

而不是数组（['225245'，'225247']，dtype = object）我需要计算文件名