Jervis Whitley wrote:
On Wed, Dec 31, 2008 at 8:33 AM, David <da...@abbottdavid.com
<mailto:da...@abbottdavid.com>> wrote:
On Mon, 29 Dec 2008 16:57:44 +0100, spir wrote:
> On Mon, 29 Dec 2008 09:10:45 -0000
> "Alan Gauld" <alan.ga...@btinternet.com
<mailto:alan.ga...@btinternet.com>> wrote:
> >
>> "bob gailer" <bgai...@gmail.com
<mailto:bgai...@gmail.com>> wrote
>>
Hi David,
If the user enters incorrect data for the month or day, a ValueError
will still be raised
on the conversion to integer.
I suggest that you wrap your request for user information in a function
that does the checking
for you. You can re-use this function for each piece of integer
information you require from the user.
example:
import time
class BadUserError(Exception):
pass
def get_integer(retrieve, question, attempts=3):
"""
A small function to attempt to retrieve
information from a user, given a prompt question.
retrive - any function that will accept a string as an argument
and return a string or otherwise response from the user.
question - a string type question that you would like to ask the user to
respond to.
attempts[optional] - how many times the user can incorrectly
enter data before the BadUserError is raised.
"""
while attempts > 0:
num = retrieve(question)
try:
# try casting the user input as an integer.
return int(num)
except ValueError:
print "Oops, You must enter a number!"
attempts -= 1
raise BadUserError("Too many incorrect tries!")
WOW, thanks Jervis, I had to edit some of my mistakes to get it to work
right if your birthday is today. I also looked at tm_year, tm_mon, and
tm_day. I still need to get it to prduce an error if the year is 0 or
2009, the month is 0 or 13 and the day is 0 or 32.
david [06:56 PM] opteron ~ $ ./py_get_age.py
Please enter the date format as: 2008 12 30
What year were you born? 2010
What month were you born? 14
What day were you born? 34
You are -3 years old.
Here is a link to the current program;
http://dwabbott.com/code/
Thanks again everyone,
-david
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