I'm doing the practice project "Coin flip streaks" from Automate the Boring Stuff, and am unsure what I'm missing or doing wrong

Question

import random

numStreaks = 0

for experimentNum in range(10000):

    # Code that creates a list of 100 'heads' or 'tails' values.
    outcome = []
    
    for i in range(100):
    
        if random.randint(0,1) == 0:
            outcome.append('H')
        else:
            outcome.append('T')

    # Code that checks if there is a streak of 6 heads or tails in a row
    Hstreak = 0

    for i in range(len(outcome)):
        for x in range(6):    
                if outcome[x] == 'H':
                    Hstreak += 1        
        if Hstreak == 6:
            numStreaks += 1
        else:
            numStreaks = 0            

print ('Chance of streak: %s%%' % (numStreaks/100))

I'm having trouble with the coin flip project from chapter 4. I have no idea on what I'm missing or doing wrong. I tried to run the code, but nothing comes up. I've looked up other people's takes on the project, but I still have no clue why my code doesn't work.

Answer 1

There is a bunch of errors here. First of all, in this piece of code:

for x in range(6):    
    if outcome[x] == 'H':
        Hstreak += 1      

You are only ever checking first 6 flips from each set of 100. Only if they all are 'H' will your numStreaks get increased. Then, as @Emre Sahin said, you are setting your numStreaks to 0 every time Hstreak is not 6. Lastly you are not resetting your Hstreak counter at any point even if streak is broken by T. All in all, you need to rethink your logic that is behind finding the streaks.

Answer 2

In your

        if Hstreak == 6:
            numStreaks += 1
        else:
            numStreaks = 0

you're setting numStreaks to 0 every time HStreak is not 6.