将数据添加到现有文件python的末尾

So my code looks like this .... but I want to add data always to the end of the document how would I do this

所以我的代码看起来像这样....但我想在文档的末尾添加数据，我该怎么做

try:
    f = open("file.txt", "w")
    try:
        f.write('blah') # Write a string to a file
        f.writelines(lines) # Write a sequence of strings to a file
    finally:
        f.close()
except IOError:
    pass

2 个解决方案

#1

Open the file using 'a' (append) instead of 'w' (write, truncate)

使用'a'（append）而不是'w'打开文件（write，truncate）

Besides that, you can do the following isntead of the try..finally block:

除此之外，您可以执行以下操作而不是try ..finally块：

with open('file.txt', 'a') as f:
    f.write('blah')
    f.writelines(lines)

The with block automatically takes care about closing the file at the end of the block.

with块自动关注在块结束时关闭文件。

#2

open the file with "a" instead of "w"

用“a”而不是“w”打开文件

#1