Person Class

You are asked to create a Person class that has four attributes: name, age, gender, and address. The class should also have a method display_info() which when called, prints the person's details in a readable format.

The class should accept 4 arguments:

1. The person's name.

2. The person's age.

3. The person's gender (M for male, F for female).

4. The person's address.

The output of the display_info() method should print the information in the following format:
Name: {name}, Age: {age}, Gender: {gender}, Address: {address}