Writing Pure Python Helper Functions

How do we write a pure Python string masking function to obfuscate customer email usernames?

Expert⏱ 2 Minutes⭐ 750 XP

🤔 THE QUESTION

How do we write a pure Python string masking function to obfuscate customer email usernames?

💡 WHAT IS IT?

A standard Python function implementing custom domain masking logic before registration as a Spark UDF.

🎯 WHAT IS IT USED FOR?

Data privacy masking, GDPR/HIPAA compliance, and custom hashing algorithms.

💻 EXAMPLE

def mask_email(email):
    if not email:
        return None
    user, domain = email.split("@")
    return user[0] + "***@" + domain

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