[英]Making new lists out of other list variables
當我想從精心選擇的整數變量中創建一個新列表,並要求新列表的總和時,我得到的答案始終為0。
else:
if "--" in epart:
epart = epart[2:]
esplit = [int(epart) for epart in esplit]
total.append(epart)
else:
epart = [int(epart) for epart in esplit]
total.append(epart)
print sum(total)
代碼的頂部是:
total = []
如果出現以下情況,如何獲取代碼以打印總計的代碼 :
esplit = ["34", "-3", "5", "--4"]
for epart in esplit:
程序應打印40,而不是0
您可以使用“ string.replace”將“-”轉換為“”,然后將值轉換為int
:
>>> esplit = ["34", "-3", "5", "--4"]
>>> sum([int(itm.replace("--", "")) for itm in esplit])
40
esplit = ["34", "-3", "5", "--4"]
print sum([int(elem[2:]) if "--" in elem else int(elem) for elem in esplit])
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