here is the code:
contract = 'DCSc'
riclist = ["{}{}".format(contract, i) for i in range(1,13,1)]
print(riclist)
df = ek.get_timeseries(riclist,'close',
start_date='20140101',
end_date='20190401', interval='daily')
df.reset_index('Date', inplace=True)
df['Date'] = df['Date'].dt.strftime('%Y%m%d')
print(df)
output: