On 20/07/12 10:45, Dave Angel wrote:
On 07/19/2012 08:36 PM, Osemeka Osuagwu wrote:
<snip>...
99 ninety nine
100 onehundred
101 one hundred and one
102 one hundred and two
103 one hundred and three
104 one hundred and four
105 one hundred and five
106 one hundred and six
107 one hundred and seven
108
Traceback (most recent call last):
File "C:/Windows.old/Users/Abasiemeka/Abasiemeka/GOOGLE
University/Python/Python Code/MyCode/Project Euler code/Project Euler
answer 17.py", line 33, in <module>
print i, num2word(i)
File "C:/Windows.old/Users/Abasiemeka/Abasiemeka/GOOGLE
University/Python/Python Code/MyCode/Project Euler code/Project Euler
answer 17.py", line 18, in num2word
wordlist = [units[eval(str(num)[-3])-1],'hundred', 'and',
num2word(eval(str(num)[-2:]))]
File "<string>", line 1
08
^
SyntaxError: invalid token
08 isn't a valid literal. Remove the leading zero. That says that the
following digits are to be interpreted as octal, and 8 isn't a valid
octal digit.
Try to think of another way to convert an integer string into an integer
value. hINT()
Much better would be to eliminate the unnecessary use of eval(). It's
dangerous, and sometimes doesn't do what you expect.
More specifically, eval() is dangerous if you try to evaluate a string
supplied by someone else. You really can't predict what will happen.
However, if you use eval() on strings that you create yourself, it can
be a handy technique. When you are starting out, it's best to ignore
eval() until later.
Ross
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