input check help!

[bowlofred]

Whenever you input something like

x = input()

Then the variable (x in this case) is always a string. In some of your other examples you're asking if it's a float, or an instance of a float, etc. It will never be. The contents might look like an integer, but the variable remains a string. You can attempt to cast that value it to a int or something else:

x = input()
i = int(x)

But of course that can fail if the input text has characters in it. What your first one does is try to cast it this way, and print a message if that fails.

x = input()
try:
    i = int(x)
    [do stuff here with your int...]
except ValueError:
    # Ooops, something in the try section failed with a valueerror.  That likely
    # means the string didn't look like an int.  We can complain here, and maybe
    # loop to retry.
    print(f"The input {x} doesn't seem to be a number. I don't know what to do with it.")