[Tutor] Battleships - Error with blank input

[Alan Gauld]

On 03/05/2023 23:09, Sharj Ahmed wrote:

> I've written the below code, but need to add some validation in for when
> the user inputs nothing.

Your code has lost all indentation which is of course critical
in Python. You need to resend the message using *plain text*
format not HTML.

> The blank input for rows and columns causes the application to crash.

Please always include the error messages - I'm assuming you
get an error message?! You should do.

I'll try to find the input statements...

> *def fire_shot():"""Asking player what row and column to fire their
> shot"""


row = input("\nEnter ship row 1-8: ")while row not in "12345678":
If row is an empty string this will pass because the empty string is in
every string.

>>> "" in "123"
True
>>> "" in ""
True

You will need to explicitly check for an empty string:

while row and row not in "12345678":

> The error message that appears is:
> [image: image.png]

You need to cut 'n paste the text. The server strips binary
attachments as security hazards.


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Alan G
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