給定行號，如何從文件中讀取它

Question

繼承我的代碼：

def option_a():
    fixchoice = int(input("Enter: "))

    file = open("firesideFixtures.txt", "r")
    print(file.readlines(fixchoice))

option_a()

每當我輸入任何數字時，它總是打印相同的行。

Answer 1

Python有一個方便的linecache庫來處理你的情況：

import linecache

def option_a():
    line_number = int(input("Enter a line number: "))
    line = linecache.getline("firesideFixtures.txt", line_number)
    print(line)

Answer 2

readlines（）的參數沒有指定從文件中讀取哪一行。 嘗試這樣的事情：

def option_a():
    fixchoice = int(input("Enter: "))

    with open("firesideFixtures.txt", "r") as file:
        for i, line in enumerate(file, 1):
            if i == fixchoice:
                print(line)
                break # Or return if you don't want to do anything after the loop

option_a()