import re
p = re.compile(r'Temp:([^,]+)')
test_str = "Temp:C5E501374D0343090957F7E5929E765C931F7D3EC7A96189FDA88549D54D9E4E5DB3FC1C2, adfsafd1242412,"
print (re.search(p, test_str).group(1))
aW1wb3J0IHJlCnAgPSByZS5jb21waWxlKHInVGVtcDooW14sXSspJykKdGVzdF9zdHIgPSAiVGVtcDpDNUU1MDEzNzREMDM0MzA5MDk1N0Y3RTU5MjlFNzY1QzkzMUY3RDNFQzdBOTYxODlGREE4ODU0OUQ1NEQ5RTRFNURCM0ZDMUMyLCBhZGZzYWZkMTI0MjQxMiwiCnByaW50IChyZS5zZWFyY2gocCwgdGVzdF9zdHIpLmdyb3VwKDEpKQ==