[v0id]

You don't need any functions to convert the numeric value to a string, you can use simple type-casting. It's possible in Python because it's a very type-weak language, so everything is almost possible with types.

Here is an example to illustrate it (copy+pastet from the idle):

>>> my_num = 100
>>> my_str = my_num # will be 'int'
>>> type(my_num)
<type 'int'>
>>> type(my_str)
<type 'int'>
>>> my_str = str(my_num) # now it'll be 'str'
>>> type(my_str)
<type 'str'>

Here it's illustrated with a list:

>>> my_numbers = [1, 2, 3, 1000, 20000, 30000]
>>> type(my_numbers)
<type 'list'>
>>> type(my_numbers[0])
<type 'int'>
>>> type(str(my_numbers[0]))
<type 'str'>
>>> type(my_numbers[0:2])
<type 'list'>
>>> type(my_numbers[0:2][0])
<type 'int'>
>>> type(str(my_numbers[0:2][0]))
<type 'str'>