围绕 Python 文件模式的混乱“w
在 Python 中，有许多文件模式允许您以不同的方式与文件交互'w' 就是这样一种模式，它引起了一些混乱。用法：
根据 Python 文档，“w”模式打开一个文件以进行写入和更新。 mode 表示文件如果存在就会被截断。
为了更清楚地了解不同的文件模式，这里有一个表格概述了它们的行为：
| Mode | Description |
|---|---|
| r | Opens a file for reading only |
| rb | Opens a file for reading in binary format |
| r | Opens a file for both reading and writing, with the file pointer at the beginning |
| rb | Opens a file for both reading and writing in binary format, with the file pointer at the beginning |
| w | Opens a file for writing only, overwriting any existing file |
| wb | Opens a file for writing in binary format, overwriting any existing file |
| w | Opens a file for both writing and reading, overwriting any existing file |
| wb | Opens a file for both writing and reading in binary format, overwriting any existing file |
| a | Opens a file for appending, with the file pointer at the end |
| ab | Opens a file for appending in binary format, with the file pointer at the end |
| a | Opens a file for both appending and reading, with the file pointer at the end |
| ab | Opens a file for both appending and reading in binary format, with the file pointer at the end |
要读取以 'w ' 模式打开的文件，您应该使用“seek()”方法来查找指向文件开头的文件指针。示例：
with open("myfile.txt", "w+") as f:
f.write("Hello, world!")
f.seek(0)
print(f.read())最后，“w”模式允许读取和写入同一文件，但应谨慎使用，因为它会覆盖任何现有内容。适合您特定需求的一款。
以上是使用 Python 的'w”文件模式有什么含义？的详细内容。更多信息请关注PHP中文网其他相关文章！
