Writing and reading — Python: Text Input/Output Fundamentals

In this lesson, you will learn more another basic operation — writing.

How to write to files

Let's open a file for writing, write some text, and then close it. The write method writes a string to the file without any additional processing:

f = open("foo.txt", "w")
f.write('Hello\nWorld!')  # 12
f.close()

Here "w" signifies the write mode, and 12 indicates the number of characters we wrote to the file using the write call. Now, let's open the file in read mode and read the entire contents: