執行代碼countsum = [163, 211, 121, 46, 11]
sumrate= countsum
for i in sumrate:
i /= total
print(i)
print("sum rate is "+str(sumrate))得到結果0.295289855072463750.38224637681159420.219202898550724640.083333333333333330.019927536231884056sum rate is [163, 211, 121, 46, 11]python初學，不太懂這是什么原理，怎么改，謝謝
1 回答
米脂
TA貢獻1836條經驗 獲得超3個贊
這是顯而易見的，迭代器變量i并不直接引用到數組中，修改i不會修改數組的元素。
你需要這么寫
# encoding: utf-8
total = 552.0
countsum = [163, 211, 121, 46, 11]
sumrate = list(map(lambda i : i / total, countsum))
print("sum rate is " + str(sumrate))結果：
sum rate is [0.29528985507246375, 0.3822463768115942, 0.21920289855072464, 0.08333333333333333, 0.019927536231884056]
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