List index out of range int(sys.argv[1])

Question

Hi! I try to run this simple code but have an error in this line: int(sys.argv[1])
Error: List index out of range
How can i fix that?
Anyone can help me?
import sys
import random
stake = int(sys.argv[1])
goal = int(sys.argv[2])
trials = int(sys.argv[3])
bets = 0
wins = 0
for t in range(trials):
# Run one experiment.
cash = stake
while cash > 0 and cash < goal:
# Simulate one bet.
bets += 1
if random.randrange(0, 2) == 0:
cash += 1
else:
cash -= 1
if cash == goal:
wins += 1
Print(str(100 * wins//trials) + '% wins')
Print('Avg # bets: ' + str(bets//trials))

Answer 1

Try to check length of `sys.argv` before proceeding with <stake>, <goal>, and <trials>.
It would be better if you also verify whether those values were convertible to `int` after checking for their availabilty..

Answer 2

How should I do that?
(Im beginner)

Answer 3

`len( sys.argv )` should return number of elements in `sys.argv`

Answer 4

It still has problem
Can you write corrected line of those parts?
I really confused

Answer 5

stake, goal, trials = 0, 0, 0
if len(sys.argv) > 2:
if sys.argv[1].isdigit():
stake = int(sys.argv[1])
if sys.argv[2].isdigit():
goal = int(sys.argv[2])
if sys.argv[3].isdigit():
trials = int(sys.argv[3])
# perform additional validation for <stake>, <goal>, <trials>
# as necessary