Python Programming Assignment

Problem Statement:

Validate give string is valid email address.

Define function 'validate_email' which will accept string as argument.
String should not be null.
Use regexp to validate email.
Use keyword pattern to define regex pattern.
Function should pass all test cases.

Instructions:

Program should be written in file build.py
Function name should be validate_email.
Input
```
 Type:  String
 Value: we@aregreat.com
```
Expected Output
```
  Type:  Boolean
  Value: True
```