Question

我目前正在尝试读取文本文件，然后将其打印到Python Shell中。它完全正确地读取文件，但是当它单独读取行时它告诉我有一个AttributeError。我怎么能解决这个问题？

这是我的代码：

import time
import linecache
print("Welcome to the League Fixture Manager!")
time.sleep(3)
print("What would you like to do?")
time.sleep(1)
print("Press A to search for a fixture.")
time.sleep(0.1)
print("Press B to view Outstanding fixtures.")
time.sleep(0.1)
print("Press C to display the leader board")
time.sleep(0.1)
print("Or press Q to quit, this will exit the application.")
time.sleep(0.1)
menuOptions = input("What would you like to do? A, B, C, or Q.")
if menuOptions == 'A':
    print("Searching for fixtures...")
    time.sleep(3)
    data = [line.strip() for line in open("Y:/Computing & Business/Students/Computing/Year 10/CA 2017 Edexcel/firesideFixtures.txt").readlines()]
    lines = data.readlines()
    print(data)
    time.sleep(1)
    print("Return to menu?")
    menuReturn = input("Y or N")
    if menuReturn == 'Y':
        print("Press B to view outstanding fixtures.")
        time.sleep(0.1)
        print("Press C to display the leaderboard")
        time.sleep(0.1)
        print("Or press Q to exit the application.")
        time.sleep(0.1)
        print("You cannot review the fixture list now you have seen it however you can scroll up to view it again.")
        time.sleep(0.1)
        menuOptions2 = input("What would you like to do? B, C, or Q?")
        if menuOptions2 == 'B':
            print("~~incomplete~~")
        elif menuOptions2 == 'C':
            print("~~incomplete~~")
        elif menuOptions2 == 'Q':
            print("Exiting Application...")
            time.sleep(1)
            exit()
    elif menuReturn == 'N':
        print("Exiting Application...")
        time.sleep(2)
        exit()
elif menuOptions == 'B':
    print("~~incomplete~~")
elif menuOptions == 'C':
    print("~~incomplete~~")
elif menuOptions == 'Q':
    print("Exiting Applicaion...")
    time.sleep(2)
    exit()

这就是我所接受的：

Welcome to the League Fixture Manager!
What would you like to do?
Press A to search for a fixture.
Press B to view Outstanding fixtures.
Press C to display the leader board
Or press Q to quit, this will exit the application.
What would you like to do? A, B, C, or Q.A
Searching for fixtures...
Traceback (most recent call last):
  File "E:\Python\Python Work\League\League3.py", line 20, in <module>
    lines = data.readlines()
AttributeError: 'list' object has no attribute 'readlines'

Answer 1

您正在尝试将readlines应用于列表。在您的示例中，data已经是包含文件行的列表。这一行：

lines = data.readlines()

是多余的。你可以删除它。更多，请注意方法readlines()在使用readline()和已经的EOF之前读取的事实会返回包含这些行的列表。

此外，我建议您在处理文件时使用with()：

with open(some_file) as f:
    ....

使用with语句的优点是无论嵌套块如何退出，都可以保证关闭文件（您没有做过的事情）。如果在块结束之前发生异常，它将在异常被外部异常处理程序捕获之前关闭该文件。

根据您的打印请求，只需循环遍历列表并将其打印出来：

for line in data:
    print(line)

我建议您阅读官方Python documentation。

AttributeError：'list'对象没有属性'readlines'（Python 3.4.4）

1 个答案: