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Errors & debugging

Handle failures gracefully, raise helpful errors, and debug with confidence.

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Errors & debugging easy

How to Raise a Custom Exception with Extra Context in Python

Define a custom exception that carries extra context fields and raise it to provide richer error information.

exceptions custom-exception error-handling
Python 
class InsufficientFundsError(Exception):
    def __init__(self, balance, amount):
        self.balance = balance
        self.amount = amount
        super().__init__(f"Withdrawal of ${amount} failed: balance ${balance} is insufficient")


def withdraw(balance, amount):
    if amount > balance:
        raise Insuffici…
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