[英]How do i add element from one list into another list?
我試圖從從文本文件中讀入的預先存在的列表的第 4 個元素創建一個新列表,以獲得所有元素的總和。 這是我目前擁有的,但我無法讓它工作。
mainlist = []
newlist = []
openfile = open('filename.txt', 'r')
for line in openfile:
line = line.rstrip().split()
mainlist.append(line)
for i in mainlist:
newlist.append(mainlist[i][4])
我是一個完整的新手,所以任何幫助將不勝感激。
我們到了
with open('source.txt', 'r') as openfile:
mainlist = [line.rstrip().split(', ') for line in openfile]
newlist = [item[3:] for item in mainlist]
print(newlist)
輸出
['30', '34', '80']
openfile = open('source.txt', 'r')
mainlist = [line.rstrip().split(', ') for line in openfile]
newlist = [item[3:] for item in mainlist]
print(newlist)
輸出
[['30', '30', '30'], ['34', '32', '23'], ['80', '30', '32']]
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.