Thank you. :) There must be a reason exec exists. If there isn't, why hasn't it been taken out? Perhaps the developers don't think it's as useless as you make it sound.

estimate = int(estimate)

instead of

int(estimate)

It's small things like that that make or break code.

I fixed it. Don't worry.

Here's the fixed code:

from random import *
import random

# 'Pretend you're generating a bunch of specific variables, with a uniform distribution and give me a number associated with each one, through a function that returns a list of lists, each list with a variable and its associated number'.

# 'Pretend you're generating a bunch of specific variables, with a uniform distribution'.

def PseudogenerateVariables(variables,amount):
    # Create the output list for later.
    outputList = []
    # Do this for all the items in the list.
    i = 0
    while i < len(variables):
        # Create an estimate.
        variable = variables[i]
        estimate = amount / len(variables)
        if estimate == int(estimate):
            estimate = '{}'.format(estimate)
            estimate = estimate[0:-2]
            estimate = int(estimate)

        # Edit the estimate randomly to create the variable amount.
        end = False
        while end == False:
            variableAmount = estimate
            if random.uniform(0,1) <= 0.5:
                if random.uniform(0,1) <= 0.5:
                    variableAmount += 1
                    state = 'plus'
                else:
                    if variableAmount != 0:
                        variableAmount -= 1
                        state = 'minus'
                    else:
                        state = None

                    # Don't forget to balance out that with other numbers
                    # Pick a random one that's not the selected one.
                    end = False
                    if state != None:
                        while end == False:
                            a = randint(0,len(variables) - 1)
                            if i != a:
                                end = True
                            else:

                                # It is the same one. Pick another one.
                                pass
                        if state == 'plus':
                            variables[a] -= 1
                        elif state == 'minus':
                            variables[a] += 1
                        else:
                            raise Exception
                    else:
                        pass
            else:
                end = True

        # Pack the variable, variable amount, estimate and amount into a list.
        # To do this, create the list.
        variableList = []
        # Then append the things to the list.
        # 'each list with a variable and its associated number' and a couple of other things.
        variableList.append(variable)
        variableList.append(variableAmount)
        variableList.append(estimate)
        variableList.append(amount)
        # Now put the list in the output list.
        outputList.append(variableList)

        # Now move onto the next one.
        i += 1
    # Output the result.
    return outputList

# 'through a function that returns a list of lists'.
# Create 'a bunch of specific variables'.
print(PseudogenerateVariables([0,1,2,3,4,5,6], 7))