已经在帮助下编程找出主力次主力，谢谢回答各位
zn ['zn1702.SHF:82643173200.0', 'zn1703.SHF:9245157300.0']
ag ['ag1706.SHF:49378337490.0', 'ag1612.SHF:511964040.0']
al ['al1702.SHF:27252645350.0', 'al1703.SHF:6384439100.0']
WH ['WH701.CZC:66012300.0', 'WH705.CZC:51514900.0']
au ['au1706.SHF:47811280600.0', 'au1612.SHF:236336100.0']
FG ['FG705.CZC:18978938600.0', 'FG701.CZC:925569700.0']
cs ['cs1705.DCE:9612565600.0', 'cs1701.DCE:708019100.0']
cu ['cu1702.SHF:87915298300.0', 'cu1703.SHF:19706591600.0']
ru ['ru1705.SHF:1.188912994e+11', 'ru1709.SHF:11599724200.0']
pp ['pp1705.DCE:22625246900.0', 'pp1701.DCE:2210791300.0']
pb ['pb1701.SHF:8845435900.0', 'pb1702.SHF:7085807150.0']
rb ['rb1705.SHF:1.8023848654e+11', 'rb1701.SHF:7890376300.0']
RM ['RM705.CZC:20880625700.0', 'RM701.CZC:1787392100.0']
TA ['TA705.CZC:94370373600.0', 'TA701.CZC:4238635700.0']
ni ['ni1705.SHF:54631595380.0', 'ni1701.SHF:4535694580.0']
CF ['CF705.CZC:20451858300.0', 'CF701.CZC:109500.0']
ZC ['ZC705.CZC:6649077700.0', 'ZC701.CZC:1064166100.0']
bu ['bu1706.SHF:39268164080.0', 'bu1701.SHF:796147120.0']
jd ['jd1705.DCE:4995712300.0', 'jd1701.DCE:321839300.0']
hc ['hc1705.SHF:33472457780.0', 'hc1701.SHF:1465977720.0']
IC ['IC1612.CFE:8625092200.0', 'IC1701.CFE:2206726000.0']
IF ['IF1612.CFE:11415765720.0', 'IF1701.CFE:2657286720.0']
a ['a1705.DCE:7570999600.0', 'a1701.DCE:1016088800.0']
c ['c1705.DCE:11282770200.0', 'c1709.DCE:780100400.0']
MA ['MA705.CZC:44535126400.0', 'MA701.CZC:3638185700.0']
OI ['OI705.CZC:23030849600.0', 'OI701.CZC:3733355800.0']
jm ['jm1705.DCE:16402347400.0', 'jm1701.DCE:1335427100.0']
i ['i1705.DCE:1.513785615e+11', 'i1709.DCE:6111173700.0']
SR ['SR705.CZC:29037140900.0', 'SR701.CZC:6223631700.0']
j ['j1705.DCE:28275357800.0', 'j1701.DCE:3251633200.0']
m ['m1705.DCE:57840992800.0', 'm1701.DCE:10205370100.0']
l ['l1705.DCE:31875253200.0', 'l1701.DCE:1873123800.0']
p ['p1705.DCE:41491794800.0', 'p1701.DCE:3173657700.0']
IH ['IH1612.CFE:3586180860.0', 'IH1701.CFE:875555220.0']
sn ['sn1701.SHF:2146316360.0', 'sn1705.SHF:249661360.0']
SM ['SM701.CZC:568991400.0', 'SM705.CZC:252190500.0']
v ['v1705.DCE:11383448000.0', 'v1701.DCE:994124000.0']
y ['y1705.DCE:43451450800.0', 'y1701.DCE:4103590200.0']
SF ['SF701.CZC:69192200.0', 'SF705.CZC:32616400.0']
