To write to an existing file, use the open() method with the following parameter:

• “a” – Append: This will append value to the end of the file
• “w” – Write: This will erase any existing content and write new value

Example:

Open the file "wscfile2.txt" and append content to the file:

p = open("wscube2.txt", "a")

p.write("Now the file has more content!")

p.close()

p = open("wscube2.txt", "r")

print(p.read())

Output:

C:\Users\My Name>python demo_file_append.py

Hello! Welcome to wscube2.txt

This file is for testing purposes.

Good Luck! Now the file has more content!

How to Create a New File in Python?

Use the open() function with one of the following parameters to create a new file in Python:

• “x” – Create: It will create a file. If the file already exists, it will return an error.
• “a” – Append: It will create a file. In case the file doesn’t exist, it will create a new one.
• “w” – Write: It will create a file if the file does not exist.

Example:

Create a file called "my_file.txt":

p = open("my_file.txt", "x")

Result: a new empty file is created!

Example:

Create a new file in case it doesn’t exist:

p = open("my_file.txt", "w")