Python Open File: Reference and Examples
Last updated:Table of Contents
Using python Version 3.x on Linux (ubuntu)
Open file modes
| Mode | Description | Cursor starts at |
|---|---|---|
'r' | Open for reading error if file doesn't exist | 0 (start of file) |
'rb' | Open for reading on binary mode error if file doesn't exist | 0 (start of file) |
'w+' | Open for reading and writing truncates file if it exists create file if it doesn't exist | 0 (start of file) |
'w+b' | Open for reading and writing on binary mode. truncates file if it exists create file if it doesn't exist | 0 (start of file) |
'a' | Open for appending, create file if it doesn't exist | 0 (start of file) if the file doesn't exist and was just created, end of file if it does exist. |
'a+' | Open for reading and appending, create file if it doesn't exist | 0 (start of file) if the file doesn't exist and was just created, end of file if it does exist. |
Move cursor to start of file
0refers to the first byte
f.seek(0)
with open(filepath, "a+") as f:
f.seek(0)
Open file for append
# file will be created if it doesn't exist
with open("my-file.txt","a") as f:
f.write("this will be added at the end of the file\n")