Open in read-only mode, the pointer of the file stops at the beginning of the file
| parameter | meaning |
|---|---|
| w | Open the file for writing, (behind the written code), if the file exists, overwrite the content of the file, if the file does not exist, create a new file for storage |
| a | Open the file for appending, inherit the characteristics of w (a will not be overwritten when the file exists), the appended content will be added at the end of the text |
| rb | Open the file in binary mode for read-only. (The rest is the same as r) |
| wb | Open and write in binary mode. (The rest is the same as w) |
| from | Append in binary mode. (The rest is the same as a) |
| r+ | Open the file for reading and writing. (The rest is the same as r) |
| w+ | Open the file for reading and writing. (The rest is the same as w) |
| a+ | Open the file for reading and writing. (The rest is the same as a) |
| rb+ | Open in binary for reading and writing. The file pointer is placed at the beginning of the file. |
| wb+ | Open in binary for reading and writing. (The rest is the same as w) |
| from + | Open in binary for appending. (The rest is the same as a) |