Satya Kiran wrote:
> I m a python newbie,infact,I m a newbie to programming and I was suggested
> it was a good idea to start it with python.
>
> I was trying a program which needs three integers from the user.I got it by
> using raw_input thrice.
> Is there a better way(s) to do it?
if you want to ask three questions, asking three questions seem to
be a rather good way to do it...
> Can a user be prompted thrice with a single raw_input and something
> additional?
you could use the input() function to read an integer tuple:
>>> a, b, c = input("enter three comma-separate values: ")
enter three comma-separate values: 1, 2, 3
>>> a
1
>>> b
2
>>> c
3
but this is pretty fragile:
>>> a, b, c = input("enter three comma-separate values: ")
enter three comma-separate values: 1, 2
Traceback (most recent call last):
File "<stdin>", line 1, in ?
ValueError: unpack tuple of wrong size
>>> a, b, c = input("enter three comma-separate values: ")
enter three comma-separate values: hello
Traceback (most recent call last):
File "<stdin>", line 1, in ?
File "<string>", line 0, in ?
NameError: name 'hello' is not defined
to work around this, you can place the input statement in a loop and
use try-except to catch any errors:
while 1:
try:
a, b, c = input("enter 3 values: ")
except KeyboardInterrupt:
raise
except:
print "invalid input; try again"
else:
break
but at this point, maybe using three separate calls aren't such a bad
idea anyway...
</F>
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