PYTHON - 文本存储[关闭]

Question

我的最后一个问题被问错了。如果我的代码是

import os
#hard code the path to the external file
external_file = '/name.txt'
#if file exists, use it to load name, else ask user
if os.path.isfile(external_file):
    name = open(external_file).read()
else:
    name = raw_input("What's your name?")

如何将名称存储在 .txt 中，以便下次启动程序时记住它，但如果我告诉它“这不是我的名字”，它将返回“你的名字是什么”并存储名称 我做错了什么

Answer 1

如果文件不存在，这将附加到文件并创建文件：

import os
#hard code the path to the external file
external_file = 'names.txt'
#if file exists, use it to load name, else ask user
if not os.path.isfile(external_file):
    with open(external_file, "a") as f:
        pass
#if file exists, use it to load name, else ask user
name = raw_input("What's your name?")
with open(external_file, "r") as f:
    lines = f.read().strip().split() # split the names to avoid issues like name "a" in name "al" being True
    if name in lines:
        print "Hi {}".format(name)
    else:
        with open(external_file, "a") as f: # using "a" will append to the file
            f.write(name)
            f.write("\n")

我不确定您检查用户是否存在的逻辑，因为您需要知道用户名才能检查用户名是否已在文件中。

这反映了您的 cmets：

import os

#hard code the path to the external file
external_file = 'names.txt'
#if file does not exist ask user for name and save it
if not os.path.isfile(external_file):
    name = raw_input("What's your name?")
    print "Hi {} I am storing your name".format(name)
    with open(external_file, "a") as f:
        f.write(name)
else:
# file exists, use it to load name and print
    with open(external_file, "r") as f:
        name =f.read()
        print "Hi {}".format(name)

如果文件不存在，则名称不能在其中，因此这将询问用户他们的姓名或如果文件存在则打印“您好”

Answer 2

如果您想将用户名写入文件，只需在代码的else 块中执行此操作即可：

if os.path.isfile(external_file):
    with open(external_file) as in_f:
        name = in_f.read()
else:
    name = raw_input("What's your name?")
    with open(external_file, "w") as out_f:
        out_f.write(name)

我还修改了代码以使用with 语句来确保文件在您完成读取或写入后关闭。

我不确定您希望如何让用户说您从文件中读取的名称不正确。文件写入部分可以使用与上面的else 块相同的代码。