import re
p = re.compile(r'(\w+)\s=\s(.+?)(?=$|\n[A-Z])', re.DOTALL)
raw = '''
CONTENT = ALL
TABLES = TEST.RAW_1
, TEST.RAW_2
, TEST.RAW_3
, TEST.RAW_4
PARALLEL = 4
'''
print(p.findall(raw))
aW1wb3J0IHJlCnAgPSByZS5jb21waWxlKHInKFx3Kylccz1ccyguKz8pKD89JHxcbltBLVpdKScsIHJlLkRPVEFMTCkKcmF3ID0gJycnCkNPTlRFTlQgPSBBTEwKVEFCTEVTID0gVEVTVC5SQVdfMQogICAgICAgICwgVEVTVC5SQVdfMgogICAgICAgICwgVEVTVC5SQVdfMwogICAgICAgICwgVEVTVC5SQVdfNApQQVJBTExFTCA9IDQKJycnCnByaW50KHAuZmluZGFsbChyYXcpKQ==
[('CONTENT', 'ALL'), ('TABLES', 'TEST.RAW_1\n , TEST.RAW_2\n , TEST.RAW_3\n , TEST.RAW_4'), ('PARALLEL', '4')]