# Stem Docs

## Tor Utilities

Miscellaneous utility functions for working with tor.

New in version 1.2.0.

Module Overview:

    is_valid_fingerprint - checks if a string is a valid tor relay fingerprint
    is_valid_nickname - checks if a string is a valid tor relay nickname
    is_valid_circuit_id - checks if a string is a valid tor circuit id
    is_valid_stream_id - checks if a string is a valid tor stream id
    is_valid_connection_id - checks if a string is a valid tor connection id
    is_valid_hidden_service_address - checks if a string is a valid hidden service address
    is_hex_digits - checks if a string is only made up of hex digits