Re: Converting String to int

[Tim Chase]

> Hi all, Another problem, with the same error (error: "invalid literal for 
> int()")

Having the actual code would be helpful...

> code:
> 
> mynums = "423.523.674.324.342.122.943.421.762.158.830"
> 
> mynumArray = string.split(mynums,".")
> 
> x = 0
> for nums in mynumArray:
>if nums.isalnum() == true:

This line would likely bomb, as in python, it's "True", not 
"true" (unless you've defined lowercase versions elsewhere)

>   x = x + int(nums)
>else:
>   print "Error, element contains some non-numeric characters"
>   break

However, I modified your code just a spot, and it worked 
like a charm:

mynums = "423.523.674.324.342.122.943.421.762.158.830"
mynumArray = mynums.split(".")
x = 0
for num in mynumArray:
 if num.isdigit():
 x = x + int(num)
 else:
 print "Error"
 break

and it worked fine.

A more pythonic way may might be

x = sum([int(q) for q in mynumArray if q.isdigit()])

or, if you don't need mynumArray for anything, you can just use

x = sum([int(q) for q in mynum.split(".") if q.isdigit()])

Hope this gives you some stuff to work with,

-tkc









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Re: Converting String to int

[Heiko Wundram]

Am Sonntag 14 Mai 2006 22:23 schrieb Ognjen Bezanov:
> mynums = "423.523.674.324.342.122.943.421.762.158.830"
>
> mynumArray = string.split(mynums,".")

This is the old way of using string functions using the module string. You 
should only write this as:

mynumArray = mynums.split(".")

(using the string methods of string objects directly)

> x = 0
> for nums in mynumArray:

This is misleading. Rename the variable to num, as it only contains a single 
number.

>if nums.isalnum() == true:

.isalnum() checks whether the string consists of _alpha_-numeric characters 
only. So, in this case, it may contain letters, among digits. .isdigit() 
checks whether it is a (base <= 10) number.

>   x = x + int(nums)
>else:
>   print "Error, element contains some non-numeric characters"

As you don't know what the offending element is, insert a:

print nums

here.

>   break

If you change the code as noted above, it works fine for me.

--- Heiko.
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Re: Converting String to int

[Ognjen Bezanov]

Hi all, Another problem, with the same error (error: "invalid literal for 
int()")

code:

mynums = "423.523.674.324.342.122.943.421.762.158.830"

mynumArray = string.split(mynums,".")

x = 0
for nums in mynumArray:
   if nums.isalnum() == true:
x = x + int(nums)
   else:
print "Error, element contains some non-numeric characters"
break


/end code

This seemed like a simple thing, and I have done it before with no issues. 
have I missed something obvious? taking into account my previous hex 
question, I tried changing int(nums) to int(nums,10) but it still gives me 
the error


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