How to use the base58.b58encode_chk function in base58

if corrupt_prefix:
        prefix = os.urandom(1)
    else:
        prefix = str(bytearray(template[0]))
    
    if randomize_payload_size:
        payload = os.urandom(max(int(random.expovariate(0.5)), 50))
    else:
        payload = os.urandom(template[1])
    
    if corrupt_suffix:
        suffix = os.urandom(len(template[2]))
    else:
        suffix = str(bytearray(template[2]))

    return b58encode_chk(prefix + payload + suffix)

def gen_valid_vectors():
    '''Generate valid test vectors'''
    while True:
        for template in templates:
            prefix = str(bytearray(template[0]))
            payload = os.urandom(template[1]) 
            suffix = str(bytearray(template[2]))
            rv = b58encode_chk(prefix + payload + suffix)
            assert is_valid(rv)
            metadata = dict([(x,y) for (x,y) in zip(metadata_keys,template[3]) if y is not None])
            yield (rv, b2a_hex(payload), metadata)

def gen_valid_vectors():
    '''Generate valid test vectors'''
    while True:
        for template in templates:
            prefix = str(bytearray(template[0]))
            payload = os.urandom(template[1]) 
            suffix = str(bytearray(template[2]))
            rv = b58encode_chk(prefix + payload + suffix)
            assert is_valid(rv)
            metadata = dict([(x,y) for (x,y) in zip(metadata_keys,template[3]) if y is not None])
            yield (rv, b2a_hex(payload), metadata)

if corrupt_prefix:
        prefix = os.urandom(1)
    else:
        prefix = bytearray(template[0])

    if randomize_payload_size:
        payload = os.urandom(max(int(random.expovariate(0.5)), 50))
    else:
        payload = os.urandom(template[1])

    if corrupt_suffix:
        suffix = os.urandom(len(template[2]))
    else:
        suffix = bytearray(template[2])

    return b58encode_chk(prefix + payload + suffix)

def gen_valid_vectors():
    '''Generate valid test vectors'''
    while True:
        for template in templates:
            prefix = str(bytearray(template[0]))
            payload = os.urandom(template[1]) 
            suffix = str(bytearray(template[2]))
            rv = b58encode_chk(prefix + payload + suffix)
            assert is_valid(rv)
            metadata = dict([(x,y) for (x,y) in zip(metadata_keys,template[3]) if y is not None])
            yield (rv, b2a_hex(payload), metadata)

def gen_valid_vectors():
    '''Generate valid test vectors'''
    while True:
        for template in templates:
            prefix = str(bytearray(template[0]))
            payload = os.urandom(template[1]) 
            suffix = str(bytearray(template[2]))
            rv = b58encode_chk(prefix + payload + suffix)
            assert is_valid(rv)
            metadata = dict([(x,y) for (x,y) in zip(metadata_keys,template[3]) if y is not None])
            yield (rv, b2a_hex(payload), metadata)

if corrupt_prefix:
        prefix = os.urandom(1)
    else:
        prefix = str(bytearray(template[0]))
    
    if randomize_payload_size:
        payload = os.urandom(max(int(random.expovariate(0.5)), 50))
    else:
        payload = os.urandom(template[1])
    
    if corrupt_suffix:
        suffix = os.urandom(len(template[2]))
    else:
        suffix = str(bytearray(template[2]))

    return b58encode_chk(prefix + payload + suffix)

if corrupt_prefix:
        prefix = os.urandom(1)
    else:
        prefix = str(bytearray(template[0]))
    
    if randomize_payload_size:
        payload = os.urandom(max(int(random.expovariate(0.5)), 50))
    else:
        payload = os.urandom(template[1])
    
    if corrupt_suffix:
        suffix = os.urandom(len(template[2]))
    else:
        suffix = str(bytearray(template[2]))

    return b58encode_chk(prefix + payload + suffix)

def gen_valid_vectors():
    '''Generate valid test vectors'''
    while True:
        for template in templates:
            prefix = str(bytearray(template[0]))
            payload = os.urandom(template[1]) 
            suffix = str(bytearray(template[2]))
            rv = b58encode_chk(prefix + payload + suffix)
            assert is_valid(rv)
            metadata = dict([(x,y) for (x,y) in zip(metadata_keys,template[3]) if y is not None])
            yield (rv, b2a_hex(payload), metadata)