> x = raw_input("x : ")
> if x.isdigit(): # ensure input is a number
> y = int(x) # convert to integer
> else:
> print 'Boo"
Hello Bob and Panagiotis,
It might be good to make this number-reading thing a function, just to
make it easier to reuse (and test!) it. Let's call this input_number()
for the moment.
#######################################################
def input_number(prompt):
"""Reads an integer from the next line of input."""
while 1:
x = raw_input(prompt)
if x.isdigit():
return int(x)
else:
print 'Boo'
#######################################################
Does this work? Let's try it informally:
######
>>> input_number('number please: ')
number please: 1
1
>>> input_number('number please: ')
number please: 1234
1234
>>> input_number('number please: ')
number please: 1st
Boo
number please: 74
74
>>>
######
I added one more behavior so that input_number continues to ask until it's
satisified by a number. Hope this helps!
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