random - Python - randint() returns empty range, crashing error -

i've been able duplicate error multiple times in poker program , tried various unsuccessful solutions. here's latest:

traceback (most recent call last):   file "c:\users\pangloss\desktop\tgchanpoker\poker.py", line 1868, in <module>     if __name__ == '__main__': main()   file "c:\users\pangloss\desktop\tgchanpoker\poker.py", line 1866, in main     maingame = game(opponent)   file "c:\users\pangloss\desktop\tgchanpoker\poker.py", line 1443, in __init__     if randint(1,betcheck+(10-handvalue[1]))<5 or gamestage == "bettingstay":   file "c:\python27\lib\random.py", line 241, in randint     return self.randrange(a, b+1)   file "c:\python27\lib\random.py", line 217, in randrange     raise valueerror, "empty range randrange() (%d,%d, %d)" % (istart, istop, width) valueerror: empty range randrange() (1,-7, -8) 

and here's relevant code:

                    handvalue = checkhand(opponent.cards.cards)                     if gamestage == "betting" or gamestage == "final" or gamestage == "finalresponding":                         betcheck = 18-handvalue[1]-round(betamount/(setmax/5))+opponent.brashness                     elif gamestage == "extendedfinal":                         betcheck = 16-handvalue[1]-round(betamount/(setmax/5))+opponent.brashness-(pot/100)                     else:                         betcheck = 16-handvalue[1]-round(betamount/(setmax/5))+opponent.brashness                     foldcheck = 16-handvalue[1]-round(betamount/(setmax/3))+opponent.brashness+(pot/100)                     if randint(1,betcheck+(10-handvalue[1]))<5 or gamestage == "bettingstay": 

this code

randint(1,betcheck+(10-handvalue[1])) 

is giving this

randrange(1,-7,-8) 

this means betcheck+(10-handvalue[1]) giving -8

that range not give number @ all, because betcheck+(10-handvalue[1])) negative number , range invalid

you need examine code sets betcheck , handvalue[1] see why negative