micropython/tests/basics/bytes_construct.py

# test construction of bytes from different objects

# tuple, list
print(bytes((1, 2)))
print(bytes([1, 2]))

# constructor value out of range
try:
    bytes([-1])
except ValueError:
    print('ValueError')

# constructor value out of range
try:
    bytes([256])
except ValueError:
    print('ValueError')

# error in construction
try:
    a = bytes([1, 2, 3], 1)
except TypeError:
    print('TypeError')