Python Data Science File Handling In Python: Creating A File Write/Create Files In Python

Write to an Existing File: To write to an existing file, you must add a parameter to the open() function.

"a" - Append - will append to the end of the file.

"w" - Write - will overwrite any existing content.

Example 8: Open the file "exampleb.txt" and append content to the file.

Code

f = open("exampleb.txt", "a")

f.write("This is the additional content!")

f.close()

#open and read the file after the appending:

f = open("exampleb.txt", "r")

print(f.read())

Output will be

ILLUSTRATION

This is Line 2.

This is Line 3.

This is Line 4.

This is Line 5.This is the additional content!

Example 9: Open the file "exampleb.txt" and overwrite the content.

Code

f = open("exampleb.txt", "w")

f.write("The file has been overwritten!")

f.close()

#open and read the file after the appending:

f = open("exampleb.txt", "r")

print(f.read())

Note: the "w" method will overwrite the entire file.

the output will be

The file has been overwritten!

Create a New File

How to create a new file?

To create a new file in Python, use the open() method, with one of the following parameters.

"x" - Create - will create a file, returns an error if the file exist

"a" - Append - will create a file if the specified file does not exist

"w" - Write - will create a file if the specified file does not exist

Example 10: Create a file called "newexample.txt".

Code

f = open("newexample.txt",
"x")

Result: This will create a new empty file.

To check examine the location where you created it!

Example 11: Create a new file if it does not exist.

f = open("mynewexample.txt",
"w")