python列表的问题

发布于 2024-10-25 00:36:51 字数 318 浏览 5 评论 0原文

您好，我正在尝试创建一个列表，通过 for 循环从 txt 文件中逐行读取添加到该列表中。我在列表中收到语法错误，但不确定如何解决该问题？？？

import re
file = open("text.txt","r")
text = file.readlines()
file.close()

line_count=0

for line in text:
    User_Input_list[] += [] + line.split()
    line_count += 1

问题似乎出在列表声明的倒数第二行

原文

Hi im trying to create a list adding to it via a for loop reading line by line from a txt file. Im getting a syntax error on the list but am unsure about how to fix the problem ???

import re
file = open("text.txt","r")
text = file.readlines()
file.close()

line_count=0

for line in text:
    User_Input_list[] += [] + line.split()
    line_count += 1

the problem seems to be on the second last line with the declaration of the list

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恏ㄋ傷疤忘ㄋ疼 2024-11-01 00:36:51

这样做：

input = []
line_count = 0
with open("text.txt","r") as file:
    for line in file:
        input.extend(line.split())
        line_count += 1

Do it like this:

input = []
line_count = 0
with open("text.txt","r") as file:
    for line in file:
        input.extend(line.split())
        line_count += 1

回复收藏 0 原文

Oo萌小芽oO 2024-11-01 00:36:51

为什么不呢
UserInputList += line.split()？

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时光清浅 2024-11-01 00:36:51

如果您希望文件中的每一行成为列表中的单独元素，可以使用以下更简单的方法：

import re
file = open("text.txt","r")
text = file.readlines()
file.close()

line_count=0
line_list = []
for line in text:
    line_list.append(line)
    line_count += 1

或使用列表理解：

import re
file = open("text.txt","r")
text = file.readlines()
file.close()

line_list = []
[line_list.append(a_line) for a_line in text]
line_count = len(line_list)

If you want each line in the file to be a separate element in the list, here's a simpler way to do it:

import re
file = open("text.txt","r")
text = file.readlines()
file.close()

line_count=0
line_list = []
for line in text:
    line_list.append(line)
    line_count += 1

Or using list comprehension:

import re
file = open("text.txt","r")
text = file.readlines()
file.close()

line_list = []
[line_list.append(a_line) for a_line in text]
line_count = len(line_list)

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