How to add random action to python?

First of all, I should say I’m a beginner in programming and I’ve only been doing this for about a month now, maybe 3 weeks (I don’t really Keep track).
Anyways as a project I’ve been coding a VERY basic adventure game in Python myself and through YouTube and stuff I found online, but I want to add a part where basically You gotta get on this boat but a ticket costs $10 (Which you have an option to get earlier).

But say you didn’t get the $10 earlier, you have another option to run past the guy who’s asking you to pay for it (Which I guess you Could also do even if you have the $10 and just save money). But if you have $10, you just go through, and if you don’t, you just restart and it runs sys.exit()

As of writing, the code looks like this:

print("A man offers you a trip to the eastern side of the village via boat")

print(
"as a bridge has not been constructed yet, but it will cost $10, do you give him it ($10 Required) or try run past him(Free)")

check_inv = input()

if "$10" not in inv:
print("He caught you making a run for it! restart game")
sys.exit()

else:

print("Let’s see if you have enough…")

print(inv)

print("You have enough and cross the river")

removeFrominventory("$10")

-END OF CODE-
(btw the code formatting does NOT look like this, but I don’t know how StackOverflow’s line spacing system works)

I know how to write a random number generator as it was another beginner project I was advised to work on, but I want to to be that if you type ‘Run’ you will have a 50/50 chance to be able to outrun him.

Thanks for any help in advance!

>Solution :

Assuming you want it to be like the RNG in pokemon or want to create a coin flip event, you could either create a list of list = [0,1] and use random.choice(list) or you could use randrange() to get a number b/w 0 and 100. Let’s say the chances to outrun are x%. If the value obtained from randrange is less than x, you outrun else you don’t. You can create a function like:

def RNG(probability):
    Generate Random num b/w 0 and 100
    if num<probability:
        return True
    else:
        return False

I would prefer the RNG function. Though it is time and memory consuming, it can be reused in the code again and again.