import luhnpy

# Create random valid luhn strings
print(luhnpy.rand()) # 4124796630572739
print(luhnpy.rand(length=5)) # 41285
print(luhnpy.rand(length=10)) # 4380357030

# Calculate luhn check digit
print(luhnpy.digit('412479663057273')) # 9

# Verify string of digits
print(luhnpy.verify('4124796630572739')) # True
print(luhnpy.verify('4039531371114851')) # False

#  Append the check digit to your string of digits
print(luhnpy.complete('412479663057273')) # 4124796630572739