Question

固定代码;

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)

问题是。

它指的是使用它的每台计算机，其名称存储在.txt中。我需要为每个mac地址/ ip /计算机提供不同的.txt

我还需要根据用户的命令更改名称

如果.txt中没有名字，它也不会要求提供姓名吗？

Answer 1

您可以尝试这样做，首先只需询问用户的名字，然后检查文件names.txt是否存在，如果不存在，则创建一个名称为name的新文件。 txt并将用户的名称附加到其中。如果该文件现在存在，请检查它是否包含用户的名称，如果该文件包含，则说出“嗨+名称”，然后将该名称附加到该文件中。

以下是对代码的快速而肮脏的修复（可以进一步改进！）：

import os
#hard code the path to the external file
external_file = 'names.txt'
#Ask the user's name
name = raw_input("What's your name?")
#if file exists, use it to load name, else create a new file
if not os.path.exists(external_file):
    with open(external_file, "a") as f: # using "a" will append to the file
        f.write(name)
        f.write("\n")
        f.close()
else:
    #if file exists, use it to load name, else ask user
    with open(external_file, "r+") as f:# r+ open a file for reading & writing
        lines = f.read().split('\n') # split the names 
        #print lines
        if name in lines:
            print "Hi {}".format(name)
        else:
            f.seek(0,2) # Resolves an issue in Windows
            f.write(name)
            f.write("\n")
            f.close()

更新：修改后的版本仅检查带有编码的名称：

import os
#hard code the path to the external file
external_file = 'names.txt'
username = 'testuser'# Our hardcoded name

#if file doesn' exists, create a new file
if not os.path.exists(external_file):
    #Ask the user's name
    name = raw_input("What's your name?")
    with open(external_file, "a") as f: # using "a" will append to the file
        f.write(name)# Write the name to names.txt
        f.write("\n")
        f.close()
else:
    #if file exists, use it to load name, else ask user
    with open(external_file, "r+") as f:# r+ open a file for reading & writing
        lines = f.read().split('\n') # split the names 
        print lines
        if username in lines: #Check if the file has any username as 'testuser'
            print "Hi {}".format(username)
        else: # If there is no username as 'testuser' then ask for a name
            name = raw_input("What's your name?")
            f.seek(0,2) # Resolves an issue in Windows
            f.write(name)# Write the name to names.txt
            f.write("\n")
            f.close()

使用file.seek()的原因是here。

存储基于计算机的输入并根据命令更改存储的输入

1 个答案: