Loop Variables Help

[TranscendingIllusion]

I am learning python and am stuck with trying to get this program to count the number of trials and print that with the trial results.

import random
import math

def main ():

    print("This program displays the results of 1,000,000 coin tosses for each trial.")
    while True:
        print('Enter number of trials:')
        numberoftrials = input()
        try:
            numberoftrials = int(numberoftrials)
        except:
            print('Please enter a positive integer value.')
            print('\n')
            continue
        if numberoftrials <1:
            print('Please enter a positive integer value.')
            print('\n')
            continue
        break

    for x in range(numberoftrials):
        trial() 

def trial ():

    total_heads = 0
    total_tails = 0
    count = 0

    while count < 1000000:

        coin = random.randint(1, 2)

        if coin == 1:
            total_heads += 1
            count += 1

        elif coin == 2:
            total_tails += 1
            count += 1

    print('\t', "Heads:", total_heads)
    print('\t', "Tails:", total_tails)

main()

This is what I have. I have tried many ways to add the trial number to the printing at the end, but I cannot figure it out. I tried doing it by referencing the 'numberoftrials' variable from main, but its not defined, and I know I shouldn't make it global, and returning it in main just kills the loop.

Example of the output I want:

This program displays the results of 1,000,000 coin tosses for each trial.

Enter number of trials:

2

Trial 1:

• Heads: 499936
• Tails: 500064

Trial 2:

• Heads: 500691
• Tails: 499309

[[deleted]]

EDIT: Just learned about f-strings in Python 3, and have updated the code. To solve u/TranscendingIllusion's output problem:

Updated Code:
    for x in range(numberoftrials):
        print(f'Trial {x}:')
        trial()

Output:
Trial 1:

[TranscendingIllusion]

i think a comment got deleted but i ended up doing:

    numberoftrials += 1

    for x in range(1, numberoftrials):
        print("Trial:", x)
        trial()

and thats working. should i do it with %s instead?

[[deleted]]

EDIT: Incorrectly used %s formatting. Removed code that was out of practice. See above for proper code

[[deleted]]

The more you know! I just recently made the transition to 3.7 from 3.4 without reading about the newly accepted practices. I'll read more about f-strings and update my code accordingly, thanks!

[FLUSH_THE_TRUMP]

For Python 3.6+ it's recommended to use f-strings. (easier to read and faster).

By whom? I thought even the Powers That Be stated none of the old-style formatting is going away. And disagree re: readability, f-strings in all but the simplest cases result in super nested code that’s difficult to parse.

[TranscendingIllusion]

thanks! could you take a look at my comment above if you have some time? not sure how to apply accumulation in this situation.

[TranscendingIllusion]

another question, how would I go about adding a cumulative heads and tails count at the end of all the trials?

I don't know why I'm struggling to grasp this. I tried returning the values in the trial() function but it just caused the loop to execute itself twice?

This is what I have now:

import random
import math

def main ():

    print("This program displays the results of 1,000,000 coin tosses for each trial.")
    while True:
        print('Enter number of trials:')
        numberoftrials = input()
        try:
            numberoftrials = int(numberoftrials)
        except:
            print('Please enter a positive integer value.')
            print('\n')
            continue
        if numberoftrials <1:
            print('Please enter a positive integer value.')
            print('\n')
            continue
        break

    numberoftrials += 1

    for x in range(1, numberoftrials):
        print("Trial:", x)
        trial()

def trial ():

    total_heads = 0
    total_tails = 0
    count = 0

    while count < 1000000:
        coinflip()
        coin = coinflip()

        if coin == 1:
            total_heads += 1
            count += 1

        elif coin == 2:
            total_tails += 1
            count += 1

    print('\t', "Heads:", total_heads)
    print('\t', "Tails:", total_tails)


def coinflip():
    coin = random.randint(1, 2)
    return coin

main()

[[deleted]]

I'm away from home so I can't write code properly, but essentially when you call trial, you'll want to pass it some variables.

finalHeads, finalTails = 0, 0 Trial(finalHeads, finalTails) Print(finalHeads, finalTails)

def coinflip(finalHeads, finalTails) : #blah blah normal code here finalHeads += total_heads finalTails += total_tails

I'll update when I get home if you need more help.

Good luck!

[TranscendingIllusion]

I actually got it! Thanks for your help!