For x in i Range(0, stop)

__author__ = 'Zoap'

def Search():

    inv = "\nInvalid input"
    invx = "\nNumber to search for must be a number!"
    invs = "\nLength must be a number!"

    print("\nThis program allows you to search for the number of possible combinations of a pin number of length x, "
          "given that you know one of the digits")

    x = str(input("\nInput number to search for: "))

    if x.isdigit() is False:
        print(invx)
        Search()
        return
    elif x.isdigit() is True:
        def PinLength():

            s = str(input("\nInput length of pin code: "))

            if s.isdigit() is False:
                print(invs)
                PinLength()
                return

            elif int(s) > 7:
                print("\nLength can not be more than 7 digits!")
                PinLength()
                return

            import math

            stop = int((math.pow(10, int(s))))

            if stop < int(x):
                print("\nLength of pin makes the number to search for bigger than the possible number of variations!")
                Search()
                return

            elif s.isdigit() is True:
                def CalcForLoop():
                    number_list = []

                    # For every integer in range add int to list and convert to string
                    for i in range(0, (stop + 1)):
                        number_list.append(str(i))

                    # For every str in list containing x, count x
                    x_numbers = [a for a in number_list if x in a]

                    # Percent of total numbers in range containing digit x
                    percent = len(x_numbers) / (stop / 100)

                    if int(x) >= 10:
                        print("\nThere are a total of " + str(len(x_numbers)) +
                              " numbers between 0 and " + str(stop) + " containing the number " + x)
                        print("\nThat is a total of " + str("%.2f" % percent) + "%" " of all numbers between 0 and " +
                              str(stop))

                    elif int(len(x_numbers)) == 1:
                        print("\nThere are a total of " + str(len(x_numbers)) +
                              " number between 0 and " + str(stop) + " containing the digit " + x)
                        print("\nThat is a total of " + str("%.2f" % percent) + "%" " of all numbers between 0 and " +
                              str(stop))

                    else:
                        print("\nThere are a total of " + str(len(x_numbers)) +
                              " numbers between 0 and " + str(stop) + " containing the digit " + x)
                        print("\nThat is a total of " + str("%.2f" % percent) + "%" " of all numbers between 0 and " +
                              str(stop))

                    def RunAgain():

                        yes = "y" or "Y"
                        no = "n" or "N"

                        choice = input("\nRun again? y/n: ")
                        if choice is yes:
                            Search()
                            return

                        elif choice is no:
                            exit()

                        else:
                            print(inv)
                            RunAgain()
                            return

                    RunAgain()

                CalcForLoop()

        PinLength()

Search()