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Pydantic value_error.ipv6

A field expected to be an IPv6 address received an invalid format.

Understanding Pydantic and Its Purpose

Pydantic is a data validation and settings management library for Python, leveraging Python's type hints. It is designed to provide data parsing and validation using Python's type annotations, ensuring that data structures are type-safe and adhere to specified constraints. Pydantic is widely used in applications where data integrity is crucial, such as web APIs, configuration management, and data processing pipelines.

Recognizing the Symptom: value_error.ipv6

When working with Pydantic, you might encounter the error code value_error.ipv6. This error typically arises when a field in your data model is expected to contain a valid IPv6 address, but the input provided does not conform to the expected format. This can lead to application crashes or incorrect data handling if not addressed.

Details About the value_error.ipv6 Issue

The value_error.ipv6 error is triggered by Pydantic's validation mechanism when it attempts to parse a string as an IPv6 address and fails. IPv6 addresses are a specific format of IP addresses that consist of eight groups of four hexadecimal digits, separated by colons. Any deviation from this format, such as incorrect characters or an incorrect number of groups, will result in this error.

Common Causes of value_error.ipv6

  • Missing or extra groups in the IPv6 address.
  • Invalid characters present in the address.
  • Incorrect use of colons or other delimiters.

Steps to Fix the value_error.ipv6 Issue

To resolve the value_error.ipv6 error, you need to ensure that the data being validated conforms to the IPv6 address format. Here are the steps to fix this issue:

Step 1: Validate the Input Format

Ensure that the input string is a valid IPv6 address. You can use online tools such as IPv6 Validator to check the format of your address.

Step 2: Update Your Pydantic Model

Ensure that your Pydantic model is correctly set up to expect an IPv6 address. Here is an example of how to define a field for an IPv6 address:

from pydantic import BaseModel, IPvAnyAddress

class NetworkConfig(BaseModel):
ipv6_address: IPvAnyAddress

The IPvAnyAddress type allows for both IPv4 and IPv6 addresses, but you can specify IPv6Address if you want to restrict it to IPv6 only.

Step 3: Test with Valid Data

After updating your model, test it with a valid IPv6 address to ensure that the error is resolved. Here is an example of a valid IPv6 address: 2001:0db8:85a3:0000:0000:8a2e:0370:7334.

Additional Resources

For more information on Pydantic and its features, you can visit the official Pydantic documentation. Additionally, for a deeper understanding of IPv6 addresses, refer to the IPv6 Wikipedia page.

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