This is my code for a battleships game, but it's very simple.

I would like feedback on is how to make it shorter, because it is quite long for what seems like a simple game. And a review on the style of it (It passed all the pep8 tests)

This is my simple code for a Battleships game:

I would like feedback on making it shorter, because it is quite long for what seems like a simple game. I'd also like a review on the style of it (it passed all the PEP8 tests).

I would like to know a good tutorial to advance this, because I found begginer tutorials online, but then they just ended, leaving me enough to make this. When I searched for advanced tutorials, they required some knowledge I didn't have (something about classes and main )

Another thing I would like feedback on is how to make it shorter, because it is quite long for what seems like a simple game. ←—— Not (really) necessary.

I would like feedback on is how to make it shorter, because it is quite long for what seems like a simple game. And a review on the style of it (It passed all the pep8 tests)

from time import sleep
from random import randint
from math import sqrt
global yes, no, board, length, height, area, gamesPlayed, \
    wins,  shipRow, shipCol, guessRow, guessCol, look
yes = ["yes", "y", "yeah", "yh", "sure", "again",
       "uh-huh", "definitely", "why not?", "yes.", "yes!"]
no = ["no", "n", "nope", "hate you", "stop", "never",
      "stop it", "why would i?"]
gamesPlayed = 0
wins = 0
inp = input("Would you like to know how to play? ").lower()


if inp in yes:
    sleep(1)
    print("A battle ship is hidden in a patch of ocean.")
    sleep(1)
    print("You have some bombs to try to hit it.")
elif inp in no:
    input(":(\n  ):\nBut anyways...\nLet's get started!\n(Press" +
          "[Enter] to continue) ")
else:

See the rest on pastebin.

from time import sleep
from random import randint
from math import sqrt
global yes, no, board, length, height, area, gamesPlayed, \
    wins,  shipRow, shipCol, guessRow, guessCol, look
yes = ["yes", "y", "yeah", "yh", "sure", "again",
       "uh-huh", "definitely", "why not?", "yes.", "yes!"]
no = ["no", "n", "nope", "hate you", "stop", "never",
      "stop it", "stahp eet", "why would i?"]
gamesPlayed = 0
wins = 0
inp = input("Would you like to know how to play? ").lower()


if inp in yes:
    sleep(1)
    print("A battle ship is hidden in a patch of ocean.")
    sleep(1)
    print("You have some bombs to try to hit it.")
    sleep(1)
    print("To deploy a bomb, we need to know where to launch it")
    sleep(1)
    print("The most top left area is row 1, column 1.")
    sleep(1)
    print("You can make it harder by having less turns and a bigger sea.")
    sleep(1)
    print("You can also choose a harder difficulty.")
    sleep(1)
    input("Let's get started!\n(Press [Enter] to continue)")
    sleep(1)
elif inp in no:
    input(":(\n  ):\nBut anyways...\nLet's get started!\n(Press" +
          "[Enter] to continue) ")
else:
    print("OK!")
    sleep(1)
    input("Let's get started!\n(Press [Enter] to continue) ")
    sleep(1)
print("\nWhat would you like the board to look like?\nType anything f" +
      'or the default look and type "2" or "3" for the other looks')
look = input("Look:         ")
if look is "2":
    print("OK! Look 2.\n")
elif look is "3":
    print("OK! Look 3.\n")
else:
    print('OK! Look "' + look + '", AKA the default.\n')

stillPlaying = True
while stillPlaying:
    length = 0
    height = 0
    tries = 0
    board = []

    def dif2():
        global difficulty
#       Already tried once
        tries = 1
        while True:
            print('Please enter "easy", "medium" or "hard"')
            inp = input("Difficulty:   ").lower()
            if inp in ["0", "easy", "e", "beginner", "fácil"]:
                difficulty = 0
                break
            elif inp in ["1", "medium", "m", "amateur", "médio"]:
                difficulty = 1
                break
            elif inp in ["2", "hard", "h", "expert", "professional",
                         "difícil"]:
                difficulty = 2
                break
            else:
                tries += 1
#               Some people just held the [enter] key.
                if tries is 10:
                    print("Enough with your shenanigans!")
                    print("I'm setting it to easy!")
                    print("Difficulty:   easy")
                    difficulty = 0
                    break

    def dif():
        global difficulty
        difficulty = ""
        print("What difficulty would you like to play on?\nEasy, medium",
              "or hard.")
        inp = input("Difficulty:   ").lower()
        if inp in ["0", "easy", "e", "beginner", "fácil"]:
            difficulty = 0
        elif inp in ["1", "medium", "m", "amateur", "médio"]:
            difficulty = 1
        elif inp in ["2", "hard", "h", "expert", "professional", "difícil"]:
            difficulty = 2
        else:
            dif2()

    def perm():
        """This is to prevent people to accidentally enter very large
        boards, as they aren't thet fun anyways and may use alot of
        memory.
        """
        global yes
        print("That board dimension you've picked is quite big.\nIt",
              "may make the game borderline unplayable.")
        if input("Are you sure you want a board this big? ").lower() in yes:
            print("I will take no responsibility for any damage done",
                  "to your console or PC.")
            if input("Are you sure? ") in yes:
                return True
        return False

    def boardGen(a):
        global length
        tries = 0
        while True:
            if a is "length":
                q = "Sea length:   "
            else:
                q = "Sea height:   "
            if tries is 10:
                print("OK, stop messing around!\nI'm setting it to 5!\n"+q+"5")
                return 5
            try:
                out = int(input(q))
            except ValueError:
                print("That's not a valid number! Try again!")
                tries += 1
                continue
            if isinstance(out, int):
                if out < 1:
                    print("That's too little! Try something 1 or more.")
                    tries += 1
                    continue
#               So you can't hava a 1 by 1 board and win
                elif out < 2 and length is 1:
                    print("Now that won't be any fun! Try something",
                          "2 or more.")
                    tries += 1
                    continue
                elif out > 49 and not perm():
                    tries += 1
                    continue
            break
        return out

    def turnGen():
        global area
#       area is how many squares in the board
        tries = 0
        while True:
            if tries is 10:
                print("Enough with your shenanigans!\nI'm setting it to 1!")
                print("Turns:        1")
                return 1
            try:
                out = int(input("Turns:        "))
            except ValueError:
                print("That's not a number! Try again!")
                tries += 1
                continue
            if isinstance(out, int):
                if out < 1:
                    print("That's too little! Try something 1 or more.")
                    tries += 1
                    continue
#               Area - 1 is so that you can't have as many turns as squares
#               so there's still that chance you lose.
                elif out > area-1:
                    print("That's no fun! Try something", area-1, "or under.")
                    tries += 1
                    continue
#               the 'and area > ' so you don't have to get
#               this message everytime you choose the smaller board sizes
                elif out > area / 2 and area > 5:
                    print("There won't be much strategy involved if you have",
                          "this many turns!")
                    if not (input("Are you sure? ") in yes):
                        tries += 1
                        continue
            return out

    def printBoard():
        global board, length, height, look
        if look is "2":
            count = 0
            mult = length * 2 + 1
            print("+" * mult)
            for l in board:
                print("+" + " ".join(l) + "+")
                count += 1
                if not count == height:
                    print("+" + " " * (mult-2) + "+")
            print("+" * mult)
        elif look is "3":
            for l in board:
                print("".join(l))
        else:
            for l in board:
                print(" ".join(l))

    def guessGen(a):
        tries = 0
        while True:
            if a is "row":
                q = "Guess row:    "
            else:
                q = "Guess column: "
            if tries == 9:
                print("You just need to type a number!")
            elif tries == 10:
                print("...\nI'm inputting 1 manually now.\n" + q + "1")
                return 1
            try:
                out = int(input(q))
            except ValueError:
                print("That's not a valid number! Try again!")
                tries += 1
                continue
#           out - 1 as list index starts at 0, not 1
            return out - 1

    def distance():
        global difficulty, shipRow, shipCol, guessRow, guessCol, area
        distRow = shipRow - guessRow
        distCol = shipCol - guessCol
        av = sqrt(area)
        s1 = ""
        s2 = ""
        if distRow < 0:
            s1 = "north "
#           To make it positive
            distRow *= -1
        elif distRow > 0:
            s1 = "south "
        if distCol < 0:
            s2 = "west "
            distCol *= -1
        elif distCol > 0:
            s2 = "east "
        dist = distCol + distRow
        if difficulty is 0:
            print("The battleship was to the " + s1 + s2 + "of that bomb.")
            print("It was also", dist, "squares away.")
        elif difficulty is 1:
            print("The battleship was", dist, "squares away.")
        elif difficulty is 2:
            if dist is 1:
                print("The battleship was right there!")
            elif dist < av / 16:
                print("The battleship was very close.")
            elif dist < av / 12:
                print("The battleship was close.")
            elif dist < av / 8:
                print("The battleship was pretty close.")
            elif dist < av / 4:
                print("The battleship was far")
            elif dist < av / 2:
                print("The battleship was very far")
            else:
                print("The battleship was nowhere near where the bomb landed.")
    won = False
    dif()
    length = boardGen("length")
    height = boardGen("height")
    area = height * length
    print("Length:      ", length, "\nHeight:      ", height)
    print("Area:        ", area)
    for i in range(height):
        board.append(["O"] * length)
    turns = turnGen()
    tries = 0
    print("Turns:       ", turns)
    shipRow = randint(0, len(board)-1)
    shipCol = randint(0, len(board[0])-1)
    for turn in range(turns):
        turnsRemaining = turns - turn
        print()
        if turn is 0:
            print("Let's play battleships!")
        elif turnsRemaining is 1:
            print("Last turn!")
        else:
            print(turnsRemaining, "turns remaining!")
        print("Turn", turn+1)
        printBoard()
        guessRow = guessGen("row")
        guessCol = guessGen("col")
        if guessRow is shipRow and guessCol is shipCol:
            print("Congratulations! You sunk the battleship!")
            wins += 1
            won = True
            break
        else:
            if guessRow < 0 or guessRow > height-1 or \
               guessCol < 0 or guessCol > length-1:
                print("Oops, that's not even in the ocean.")
                distance()
            elif board[guessRow][guessCol] is "X":
                print("You already guessed that one.")
                distance()
            else:
                print("You missed the battleship!")
                board[guessRow][guessCol] = "X"
                distance()
    board[shipRow][shipCol] = "B"
    print()
    printBoard()
    gamesPlayed += 1
    if won:
        s = "You won!"
    else:
        s = "Game over!"
    print(s, "The battleship (B) was in row", str(shipRow + 1) + ", column",
          str(shipCol + 1) + ".")
    inp = input("Play again? ")
    if inp in yes:
        continue
    elif inp in no:
        print(":(\n  ):")
        sleep(1)
        stillPlaying = False
    elif inp is "":
        print("This was put here so you couldn't just spam the",
              '"Enter" button repeatedly to play.')
        print("If this was a mistake, please don't press the",
              '"Enter" button without typing anything into this field.')
        stillPlaying = False
    else:
        print('I\'ll take that as a "Yes"')
        continue
if gamesPlayed is 1:
    s1 = "game"
else:
    s1 = "consecutive games"
if wins is 1:
    s2 = "You sunk one battleship"
else:
    s2 = "You sunk a total of " + str(wins) + " battleships"
if gamesPlayed is wins and s1 is "game":
    s3 = " and didn't let it get away!"
elif gamesPlayed is wins:
    s3 = " and didn't let any get away!"
elif gamesPlayed - wins is 1:
    s3 = ", but 1 got away!"
else:
    s3 = ", however, you let " + str(gamesPlayed-wins) + \
         " battleships get away!"
print("You played", gamesPlayed, s1, "of battleships!")
print(s2 + s3)
if (gamesPlayed-wins) * 2 > wins:
    print("Better luck next time!")
else:
    print("Well done!")
sleep(2)
input("(Press [enter] to terminate) ")