python open
时间: 2023-10-19 22:21:14 浏览: 44
The `open()` function in Python is used to open a file and return a file object. It takes two arguments: the file name (including the path) and the mode in which the file is to be opened. The mode can be "r" for reading, "w" for writing (truncating the file if it already exists), "a" for appending to the end of the file, "x" for exclusive creation (failing if the file already exists), "b" for binary mode, and "t" for text mode. If the mode argument is not specified, "r" (reading mode) is assumed by default.
Example usage:
```
# Open a file for reading
file = open("example.txt", "r")
# Open a file for writing and truncate it if it already exists
file = open("example.txt", "w")
# Open a file for appending
file = open("example.txt", "a")
# Open a binary file for writing
file = open("example.bin", "wb")
```
It's important to close the file after using it to free up system resources:
```
file.close()
```
相关推荐
![pdf](https://img-home.csdnimg.cn/images/20210720083512.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![-](https://csdnimg.cn/download_wenku/file_type_column_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)
![](https://csdnimg.cn/download_wenku/file_type_ask_c1.png)