pyfwert 0.1.1

A pattern-based password generator that creates strong, memorable passwords

Pyfwert

A pattern-based password generator that creates strong, memorable passwords.

Pyfwert is a Python port of the Pafwert VB6 password generator. Unlike random generators that produce strings like "KBYd4ie*2", Pyfwert generates passwords like "bone.horse.berner" or "Miss. Undercarriage" using pattern templates and extensive wordlists.

Installation

pip install pyfwert

Quick Start

from pyfwert import generate_password

# Generate a simple password
password = generate_password("{word}.{word}.{word}")
# Example output: "bone.horse.berner"

# Generate with numbers and symbols
password = generate_password("{word}{number(99)}{symbol}")
# Example output: "dragon42!"

# Generate with modifiers
password = generate_password("{word+uppercase}-{word+obscure}")
# Example output: "THUNDER-h0rs3"

Advanced Usage

from pyfwert import PasswordGenerator

# Create a generator with custom wordlist directory
gen = PasswordGenerator(wordlist_dir="/path/to/wordlists")

# Generate with various patterns
password = gen.generate("{word(animal)+propercase} {word(color)}")
# Example output: "Horse blue"

# Use backreferences
password = gen.generate("{number(9)}{$W1}{$W1}")
# Example output: "777"

Pattern Syntax

Patterns use placeholders enclosed in curly braces {...}:

Basic Placeholders

• {word} - Random word from default wordlist
• {word(animal)} - Random word from specific wordlist
• {number} - Random digit (0-9)
• {number(99)} - Random number (0-99)
• {number(100,999)} - Random number in range
• {symbol} - Random symbol
• {letter} - Random letter
• {vowel} - Random vowel
• {consonant} - Random consonant
• {pronounceable} - Fake pronounceable word
• {sequence(5)} - Keyboard sequence of length 5

Modifiers

Add modifiers with +:

• +uppercase / +ucase - Convert to uppercase
• +lowercase / +lcase - Convert to lowercase
• +propercase - Capitalize first letter
• +randomcase - Random capitalization
• +obscure - L33t-speak substitutions
• +reverse - Reverse the text
• +bracket - Wrap in brackets
• +piglatin - Convert to pig latin
• +scramble - Scramble letters
• +num2words - Convert number to words

Selection Groups

Use | for random selection:

"{word|number|symbol}"  # Randomly picks word, number, or symbol
"{Mr.|Mrs.|Ms.}"        # Randomly picks a title

Qualifiers

Use [N] for percentage chance:

"{word[50]}"  # 50% chance of including a word
"{symbol[25]}"  # 25% chance of including a symbol

Backreferences

Use $W1, $W2, etc. to reference previous placeholders:

"{number(9)}{$W1}{$W1}"  # Repeats the same digit: "777"

Escape Characters

• \\ - Literal backslash
• \{ - Literal opening brace
• \} - Literal closing brace
• \+ - Literal plus sign

License

Apache 2.0 - See LICENSE for details.

Credits

Original Pafwert by Mark Burnett (2001-2013). Python port created in 2026.