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我正在努力理解itertools.groupby的工作原理。我有一个excel电子表格,第一列的交付日期是第二列的目的地Lat,第三列的目的地是Lon。早些时候,我能够得到帮助,将相同的日期分组到大数组的子阵列中他们。这是执行它的代码。Itertools Groupby问题
with xlrd.open_workbook(file_location) as workbook:
sheet = workbook.sheet_by_index(0)
Dates = (sheet.cell_value(i,0) for i in range(sheet.nrows))
Day = [list(group) for key, group in itertools.groupby(Dates)]
现在我需要更进一步,将Lat组合到一个数组中,并将Lon组合到另一个数组中,但将它们分组到一天中。我试过将上面列出的代码与类似这样的东西结合起来,但我不知道如何将Lat和Lon变量合并到itertools groupby函数中。
with xlrd.open_workbook(file_location) as workbook:
sheet = workbook.sheet_by_index(0)
for i in range(sheet.nrows):
Lat = (sheet.cell_value(i,2) for i in range(sheet.nrows))
DeliveryX = [list(group) for key, group in itertools.groupby(Dates)]
Lon = (sheet.cell_value(i,3) for i in range(sheet.nrows))
DeliveryY = [list(group) for key, group in itertools.groupby(Dates)]