import tejapi
tejapi.ApiConfig.api_key = "your key"
TSMC = tejapi.get(
    'TWN/EWPRCD', 
    coid = '2330',
    mdate={'gte':'2020-06-01', 'lte':'2021-04-12'}, 
    opts={'columns': ['mdate','open_d','high_d','low_d','close_d', 'volume']}, 
    paginate=True
    )
UMC = tejapi.get(
    'TWN/EWPRCD', 
    coid = '2303',
    mdate={'gte':'2020-06-01', 'lte':'2021-04-12'},
    opts={'columns': ['mdate','open_d','high_d','low_d','close_d', 'volume']}, 
    paginate=True
    )
UMC = UMC.set_index('mdate')
TSMC = TSMC.set_index('mdate')