Python Coding Example Video

This python coding example video completes the battleship game. This video we add the python code to create player’s ships and improve the tactics to the computer shooting and allow the player to choose the amount and size of the battleships. Finally we put all of the code together.

#python #pythonprogramming #pythontutorials #coding #computerprogramming

00:00 start
00:44 player ships
09:23 code two players
20:46 testing

Python Fun and Games:

Battleships game:

Acey Deucy card game:

7 card rummy card game:

If you want to learn to code, these Python tutorials are for you. Hi, my name is Dr Codie and I am the python coder. Codie means ‘helpful person’ and we want to help you not just learn python but to enjoy learning python.

In my experience, success with coding comes down to getting the fundamentals right. You can then move onto advanced programming concepts and skills. You will understand how to do simple coding tasks and then we will show you the simple methods of putting lines or blocks of code together using this knowledge. Practice is essential for your skills to grow but again do not fear we will help you practice as well.
Learn to understand the logic and design aspects needed to become a good programmer, let us help you practice to keep improving and don’t forget the bonus of seeing first hand how to build the code and possible stumbling blocks when we explain the answers to the tasks set within the tutorial. You do not need to watch the whole video but if you do you will improve as a python coder!
SUBSCRIBE and you will know when the videos are available! Good luck!

[DrCodie]

Our 100th video is a bumper edition - multiple videos rolled into one! Plus it finishes the battleship game. Live coding with no design so many bugs along the way but the final game plays pretty good. Subtitles will take time but will be available soon after publishing. Please enjoy! Any suggestions for future videos welcome. If you can't see the code comment below try using the' sort by' option.

[roamey]

Thanks for the battleship game. Is the hangman game easy to code? If so can you show how to code this game please.

[philipwhitty]

Hey I have been coding along with this tutorial and find it great. I have got to your last video in the playlist. Only problem is when i run my code in the terminal now its printing out a few boards and not just the two boards like it should up to this point. I have also just copied your entire code just to check if it runs in my terminal and it doesn't work for me. It gives the user a question "enter your ship lenght" and when i type number it keeps returning that question. Any suggestions for me ? I am new enough to python so maybe i'm doing something wrong on my side of things.

[tanercoder]

Hi! Thanks for this tutorial! I practiced some more python along with your code but couldn't complete it. I wish your tutorials had less leftover unnoticed bugs and more structured content (may be even less than 20 mins). May be use more consistent and self-describing variable and functions names. This was big headache towards the end, as the code grew up more than 200 lines. Like, boat and ship - confusing. Com and compl, etc. I gave such variables a proper long names in my code anyways. Also, some condition checks were not correct. All these can throw off a beginner. So, I'll put away this project for now.

[caseyyeow]

Thx. Tried the codes but encountered issue: show-board show nothing after enter the numbers, still don't know why. Do you have your complete codes somewhere for me to check?

[DrCodie]

Here is the final code:
from random import randrange
import random

def check_ok(boat, taken):

boat.sort()
for i in range(len(boat)):
num = boat[i]
if num in taken:
boat = [-1]
break
elif num < 0 or num > 99:
boat = [-1]
break
elif num % 10 == 9 and i < len(boat)-1:
if boat[i+1] % 10 == 0:
boat = [-1]
break
if i != 0:
if boat[i] != boat[i-1]+1 and boat[i] != boat[i-1]+10:
boat = [-1]
break

return boat

def get_ship(long, taken):

ok = True
while ok:
ship = []
#ask the user to enter numbers
print("enter your ship of length ", long)
for i in range(long):
boat_num = input("please enter a number")
ship.append(int(boat_num))
#check that ship
ship = check_ok(ship, taken)
if ship[0] != -1:
taken = taken + ship
break
else:
print("error - please try again")

return ship, taken

def create_ships(taken, boats):

ships = []
#boats = [5, 4, 3, 3, 2, 2]

for boat in boats:
ship, taken = get_ship(boat, taken)
ships.append(ship)

return ships, taken

def check_boat(b, start, dirn, taken):

boat = []
if dirn == 1:
for i in range(b):
boat.append(start - i*10)
elif dirn == 2:
for i in range(b):
boat.append(start + i)
elif dirn == 3:
for i in range(b):
boat.append(start + i*10)
elif dirn == 4:
for i in range(b):
boat.append(start - i)
boat = check_ok(boat, taken)
return boat

def create_boats(taken, boats):

ships = []
#boats = [5, 4, 3, 3, 2, 2]
for b in boats:
boat = [-1]
while boat[0] == -1:
boat_start = randrange(99)
boat_direction = randrange(1, 4)
#print(b, boat_start, boat_direction)
boat = check_boat(b, boat_start, boat_direction, taken)
ships.append(boat)
taken = taken + boat
#print(ships)

return ships, taken

def show_board_c(taken):
print(" battleships ")
print(" 0 1 2 3 4 5 6 7 8 9")

place = 0
for x in range(10):
row = ""
for y in range(10):
ch = " _ "
if place in taken:
ch = " o "
row = row + ch
place = place + 1

print(x, " ", row)

def get_shot_comp(guesses, tactics):

ok = "n"
while ok == "n":
try:
if len(tactics) > 0:
shot = tactics[0]
else:
shot = randrange(99)
if shot not in guesses:
ok = "y"
guesses.append(shot)
break
except:
print("incorrect entry - please enter again")

return shot, guesses

def show_board(hit, miss, comp):
print(" battleships ")
print(" 0 1 2 3 4 5 6 7 8 9")

place = 0
for x in range(10):
row = ""
for y in range(10):
ch = " _ "
if place in miss:
ch = " x "
elif place in hit:
ch = " o "
elif place in comp:
ch = " O "
row = row + ch
place = place + 1

print(x, " ", row)

def check_shot(shot, ships, hit, miss, comp):

missed = 0
for i in range(len(ships)):
if shot in ships[i]:
ships[i].remove(shot)
if len(ships[i]) > 0:
hit.append(shot)
missed = 1
else:
comp.append(shot)
missed = 2
if missed == 0:
miss.append(shot)

return ships, hit, miss, comp, missed

def calc_tactics(shot, tactics, guesses, hit):

temp = []
if len(tactics) < 1:
temp = [shot-1, shot+1, shot-10, shot+10]
else:
if shot-1 in hit:
temp = [shot+1]
for num in [2, 3, 4, 5, 6, 7, 8]:
if shot-num not in hit:
temp.append(shot-num)
break
elif shot+1 in hit:
temp = [shot-1]
for num in [2, 3, 4, 5, 6, 7, 8]:
if shot+num not in hit:
temp.append(shot+num)
break
if shot-10 in hit:
temp = [shot+10]
for num in [20, 30, 40, 50, 60, 70, 80]:
if shot-num not in hit:
temp.append(shot-num)
break
elif shot+10 in hit:
temp = [shot-10]
for num in [20, 30, 40, 50, 60, 70, 80]:
if shot+num not in hit:
temp.append(shot+num)
break
#tactics longer
cand =[]
for i in range(len(temp)):
if temp[i] not in guesses and temp[i] < 100 and temp[i] > -1:
cand.append(temp[i])
random.shuffle(cand)

return cand

def get_shot(guesses):

ok = "n"
while ok == "n":
try:
shot = input("please enter your guess")
shot = int(shot)
if shot < 0 or shot > 99:
print("incorrect number, please try again")
elif shot in guesses:
print("incorrect number, used before")
else:
ok = "y"
break
except:
print("incorrect entry - please enter again")

return shot

def
return all([not elem for elem in list_of_lists ])


#before game
hit1 = []
miss1 = []
comp1 = []
guesses1 = []
missed1 = 0
tactics1 = []
taken1 = []
taken2 = []
hit2 = []
miss2 = []
comp2 = []
guesses2 = []
missed2 = 0
tactics2 = []

battleships = [5, 4, 3, 3, 2, 2]
# game amount of ships
#computer creates a board for player 1
ships1, taken1 = create_boats(taken1, battleships)
#user creates the board for player 2 - show board
ships2, taken2 = create_ships(taken2, battleships)
show_board_c(taken2)

#loop
for i in range(80):

#player shoots
guesses1 = hit1 + miss1 + comp1
shot1 = get_shot(guesses1)
ships1, hit1, miss1, comp1, missed1 = check_shot(shot1, ships1, hit1, miss1, comp1)
show_board(hit1, miss1, comp1)
#repeat until ships empty
if check_if_empty_2(ships1):
print("end of game - winner in", i)
break
#computer shoots

shot2, guesses2 = get_shot_comp(guesses2, tactics2)
ships2, hit2, miss2, comp2, missed2 = check_shot(shot2, ships2, hit2, miss2, comp2)
show_board(hit2, miss2, comp2)

if missed2 == 1:
tactics2 = calc_tactics(shot2, tactics2, guesses2, hit2)
elif missed2 == 2:
tactics2 = []
elif len(tactics2) > 0:
tactics2.pop(0)

if check_if_empty_2(ships2):
print("end of game - computer wins", i)
break