Reading and Writing Files

Reading from a File

To start reading a file, you first need to open it in the appropriate mode. Here's how you can open and read from a file:

Reading Specific Characters

You can also read a specific number of characters by passing a numeric argument to the read method:

Reading Line by Line

To read a file line by line, you can use a loop along with the readline() or readlines() methods. The readline() method returns a string for each line, while readlines() returns a list of all lines:

For more efficient line-by-line reading without loading the entire file into memory, use a for loop with readlines():

Writing to a File

To write data to a file, you should open it in write mode ('w'). Only strings can be passed to the write() method.

Note

The writing mode overwrites the existing file content.

In this case, any existing data in "greetings.txt" will be replaced with "Bonjour!"