# 如果类型不对sum()就会拼接
df[u'assetvalue'] = df[u'assetvalue'].astype('float64')
# print df
data = df[u'assetvalue'].groupby((df[u'compname'], df[u'parentname'], df[u'parentcode'],df[u'assessdate']))
print data.sum()
print data.sum().to_excel('./e.xlsx')
# 修改或者获取某一列中的某条件的值
#修改 :
fundinfo_total.loc[fundinfo_total[u'fundcode'] == fund, 'compname'] = '666666'
# 获取:
print fundinfo_total.loc[fundinfo_total[u'fundcode'] == fund, 'compname']
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