如何使用python编辑一个.txt文件，我想在每个数字后粘贴一个特定的字符串

9418012345，你好，世界
9418154321，你好，世界
94xxxxxxxx，你好，世界
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1000个手机号码，但信息相同。

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我已经把手机号码贴在每一行了。如何在所有数字后添加逗号和相同的消息。

您可以读取文件行并将其存储在字符串列表中，然后将字符串添加到所有行：

text_to_add = ', hello world'    

with open('numbers.txt') as f:
    lines = f.read().splitlines()
with open('result_file.txt', "w") as f:
    for line in lines:
        print(line + text_to_add, file=f)

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阅读内容并通过添加所需的消息在行上迭代，然后使用新内容再次将其写入文件

message = "HelloWorld"
with open("number.txt") as fd:
    lines = fd.read().splitlines()
    
with open("file_with_text.txt","w") as fd:
    for line in lines:
        print(f'{line}, {message}', file=fd)

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逐行读取只有数字的文件。用字符串将新行一行一行写到另一个文件中。将第一个文件替换为第二个文件。谢谢，它只需稍微调整wrt下一行和空格

message = "HelloWorld"
with open("number.txt") as fd:
    lines = fd.read().splitlines()
    
with open("file_with_text.txt","w") as fd:
    for line in lines:
        print(f'{line}, {message}', file=fd)