Setting an Elif the user enters a string instead of an int

Hey there,

I am trying to avoid an error when the user inputs a string/letter as a column or a row.

However I cannot seem to get the proper type to set the if…

Removing the int() sets the input types as “Unicode” and letting the int() will generate an error when inputting a letter.

How can I achieve this?

Here’s my code right now.
The type(guess_row) and col was written to test out the different type results

from random import randint

board = []

for x in range(0, 5):
  board.append(["O"] * 5)

def print_board(board):
  for row in board:
    print " ".join(row)

print_board(board)

def random_row(board):
  return randint(0, len(board) - 1)

def random_col(board):
  return randint(0, len(board[0]) - 1)

ship_row = random_row(board)
ship_col = random_col(board)
print ship_row
print ship_col

guess_row = int(raw_input("Guess Row: "))
guess_col = int(raw_input("Guess Col: "))
print guess_row
print guess_col
print type(guess_row)
print type(guess_col)

# Write your code below!
if guess_row == ship_row and guess_col == ship_col:
  print "You win, I guess"
elif type(guess_row) != int or type(guess_col) != int:
  print "C'mon. You need to enter numbers."
elif board[guess_row][guess_col] == "X":
  print "You guessed that one already."
else:
  if guess_row not in range(5) or \
  guess_col not in range(5):
    print "Oops, that's not even in the ocean."
  else:
    print "You missed the battleship!"
    board[guess_row][guess_col] = "X"
    print_board(board)

https://www.codecademy.com/courses/learn-python/lessons/battleship/exercises/test-run?action=resume_content_item

python has a method to check if a string is a digit, you could use this?

Or you could just handle the exception?

Hey ! Thanks for the reply.

I ended up doing this:

try:
  guess_row = int(raw_input("Guess Row: "))
except (ValueError):
  guess_row = "string"
try:
  guess_col = int(raw_input("Guess Col: "))
except (ValueError):
  guess_col = "string"
      
if guess_row == ship_row and guess_col == ship_col:
  print "Congratulations! You sunk my battleship!"
else:
  if guess_row == "string" or guess_col == "string":
    print "C'mon, you need to enter numbers."
  elif (guess_row < 0 or guess_row > 4) or \
  (guess_col < 0 or guess_col > 4):
    print "Oops, that's not even in the ocean."
  elif(board[guess_row][guess_col] == "X"):
    print "You guessed that one already."
  else:
    print "You missed my battleship!"
    board[guess_row][guess_col] = "X"

It hit two birds with one stone because I wanted to tackle the error when you don’t input anything after and this solves both situations