找出具有相同形状的两个DataFrame之间的差异

Posted 2021-04-29

我试图找到两个具有行数的excel文件之间的差异。我首先想要在两列上对两个工作簿进行排序，然后输出具有差异的第三个文件。我无法正确导出差异文件。

任何帮助都非常感谢!!!提前致谢！

将pandas导入为pd

df1 = pd.DataFrame({
  'ID' : ['3', '3', '55','55', '66', '66'],
 'date' : [20180102, 20180103, 20180104, 20180105, 20180106, 20180107],
   'age': [0, 1, 9, 4, 2, 3],
})



df2 = pd.DataFrame({
  'ID' : ['3', '55', '3','66', '55', '66'],
 'date' : [20180103, 20180104, 20180102, 20180106, 20180105, 20180107],
   'age': [0, 1, 9, 9, 8, 7],
})



df3 = df1.sort_values(by= ['ID', 'date'] , ascending=False)
df4 = df2.sort_values(by= ['ID', 'date'] , ascending=False)


dfDiff = df3.copy()

for row in range(dfDiff.shape[0]):
    for col in range(dfDiff.shape[1]):
        value_old = df3.iloc[row,col]
        value_new = df4.iloc[row,col]
        if value_old == value_new:
           dfDiff.iloc[row,col] = df4.iloc[row,col]
        else:
            dfDiff.iloc[row,col] = ('{}->{}').format(value_old,value_new)




writer = pd.ExcelWriter('diff', engine='xlsxwriter')

dfDiff.to_excel(writer, sheet_name='DIFF', index= False)

workbook = writer.book
worksheet = writer.sheets['DIFF']
worksheet.hide_gridlines(2)


writer.save()

答案

我认为你只是在文件路径的末尾错过了.xlsx

df1 = pd.DataFrame({
  'ID' : ['3', '3', '55','55', '66', '66'],
 'date' : [20180102, 20180103, 20180104, 20180105, 20180106, 20180107],
   'age': [0, 1, 9, 4, 2, 3],
})



df2 = pd.DataFrame({
  'ID' : ['3', '55', '3','66', '55', '66'],
 'date' : [20180103, 20180104, 20180102, 20180106, 20180105, 20180107],
   'age': [0, 1, 9, 9, 8, 7],
})



df3 = df1.sort_values(by= ['ID', 'date'] , ascending=False)
df4 = df2.sort_values(by= ['ID', 'date'] , ascending=False)


dfDiff = df3.copy()

for row in range(dfDiff.shape[0]):
    for col in range(dfDiff.shape[1]):
        value_old = df3.iloc[row,col]
        value_new = df4.iloc[row,col]
        if value_old == value_new:
            dfDiff.iloc[row,col] = df4.iloc[row,col]
        else:
            dfDiff.iloc[row,col] = ('{}->{}').format(value_old,value_new)



# added `.xlsx' to path here
writer = pd.ExcelWriter('diff.xlsx', engine='xlsxwriter')

dfDiff.to_excel(writer, sheet_name='DIFF', index= False)

workbook = writer.book
worksheet = writer.sheets['DIFF']
worksheet.hide_gridlines(2)


writer.save()