Python : io.UnsupportedOperation:不可写

Question

我正在运行python代码，代码是：

f = open("File.txt", "r")
f.write("my first file\n")
f.write("my second file \n\n")
f.write("contains three lines\n")
f.read(2)

但我一直有个错误：

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PS F:\ping> python -u "f:\ping\file.py"
Traceback (most recent call last):  File "f:\ping\file.py", line 2, in <module>
f.write("my first file\n")
io.UnsupportedOperation: not writable

我的密码怎么了？

Answer 1

以读取模式打开文件。将"r"更改为"w"。

f = open("File.txt", "w")