python - how to add a random 7 digit number to a random number of a list as a str [duplicate]

from random import randint
import random


my_list=['169', '170', '149', '150', '171', '168', '136', '137', '138', '545', '505', '636', '164', '165', '172', '623', '506', '519', '154', '155', '567', '173', '159', '160', '604', '274', '275', '295', '637', '292', '492', '289', '677', '294', '493', '279', '280', '288', '284', '285', '638', '291', '640', '293', '675', '282', '283', '286', '287', '296', '297', '290', '400', '401', '404', '405', '397', '398', '399', '647', '502', '584', '402', '403', '392', '393', '395', '396', '386', '387', '503', '444', '551', '447', '561', '445', '718', '083', '446', '448', '552', '543', '442', '443', '051', '052', '053', '058', '055', '617', '057', '618', '059', '060', '061', '062', '544', '056', '571', '593', '667', '348', '586', '338', '339', '343', '344', '346', '337', '554', '469', '537', '345', '470', '341', '342', '483', '484', '557', '418', '416', '417', '412', '413', '592', '612', '613', '406', '407', '421', '598', '419', '385', '420', '528', '213', '214', '205', '206', '498', '568', '711', '217', '218', '221', '582', '483', '625', '576', '578', '227', '208', '209', '225', '577', '712', '215', '216', '626', '627', '579', '713', '499', '222', '219', '220', '500', '501', '623', '497', '223', '689', '487', '226', '224', '386', '211', '212', '628', '202', '203', '531', '288', '261', '273', '630', '264', '518', '631', '258', '259', '570', '265', '268', '269', '653', '517', '569', '267', '262', '263', '593', '266', '693', '271', '272', '694', '270', '516', '333', '334', '691', '323', '322', '595', '395', '641', '596', '336', '335', '496', '337', '324', '325', '394', '330', '332', '331', '687', '422', '423', '599', '600', '688', '424', '425', '426', '550', '697', '384', '377', '378', '558', '385', '646', '375', '376', '372', '373', '379', '380', '383', '674', '381', '382', '676', '722', '542', '312', '313', '317', '310', '311', '302', '303', '583', '321', '382', '304', '305', '536', '605', '308', '309', '306', '307', '319', '313', '314', '606', '320', '698', '298', '299', '535', '315', '316', '318', '607', '608', '508', '538', '728', '509', '438', '439', '580', '590', '559', '588', '431', '432', '037', '038', '702', '240', '241', '670', '648', '252', '678', '253', '649', '513', '546', '671', '246', '247', '654', '548', '547', '655', '248', '249', '253', '514', '665', '673', '228', '229', '230', '679', '256', '257', '244', '245', '681', '723', '236', '237', '683', '656', '250', '251', '515', '242', '243', '238', '239', '657', '255', '684', '700', '642', '457', '456', '458', '459', '460', '530', '520', '358', '359', '682', '703', '364', '365', '371', '701', '720', '366', '367', '704', '361', '362', '369', '370', '635', '668', '533', '705', '699', '669', '725', '597', '611', '525', '181', '527', '585', '685', '663', '192', '193', '174', '175', '183', '184', '481', '706', '194', '195', '185', '186', '182', '199', '200', '198', '662', '190', '191', '692', '189', '707', '526', '187', '188', '729', '730', '196', '197', '661', '680', '643', '562', '572', '074', '644', '072', '073', '069', '070', '521', '573', '522', '724', '076', '077', '650', '574', '078', '079', '081', '084', '651', '086', '087', '089', '090', '553', '091', '092', '093', '094', '097', '098', '096', '105', '106', '063', '067', '068', '075', '591', '082', '635', '524', '468', '465', '461', '462', '467', '632', '555', '633', '629', '466', '696', '721', '064', '065', '523', '652', '719', '716', '085', '088', '563', '529', '353', '349', '350', '355', '609', '351', '352', '354', '732', '357', '532', '610', '356', '556', '658', '001', '002', '003', '004', '005', '006', '007', '008', '011', '020', '025', '015', '043', '666', '489', '044', '045', '048', '049', '490', '491', '695', '659', '031', '032', '664', '717', '041', '042', '471', '472', '454', '581', '449', '450', '616', '534', '455', '451', '726', '634', '453', '727', '452', '145', '146', '731', '690', '601', '504', '163', '714', '715', '566', '166', '167', '161', '162', '686', '603', '619', '118', '127', '128', '129', '620', '621', '549', '564', '575', '113', '114', '122', '540', '660', '120', '512', '510', '511', '119', '115', '112', '110', '111', '125', '126', '565', '121', '116', '117', '541', '622', '124', '108', '109', '123', '428', '427', '507', '158', '615', '152', '153']

def digit(n):
    start=10**(n-1)
    end=(10**n)-1
    return randint(start,end)

first=print(random.choice(my_list))
second=print(digit(7))

while True:
    print(str(first)+str(second))

I wanted to add a random 7 digit number to a random number from "my_list" but it gives me "NoneNone" I want my output to be for example "1691234567" (169 is a random number from my_list) and (1234567 is a random 7 digit number)