Help with replacing all numbers with the letter 'd'

[richgirl]

this wont work in codewrite when i import 're' is there another way?

Example 'aa1aa2aa3' should change to 'aadaadaad'

st = raw_input("Enter string: ")
 
def discover_digits(st):
 
....import re
....digit = re.sub('\d', 'd', 'aa1aa2aa3') # \d means  \   .........any digit
....print digit
....return digit
 
discover_digits(st)

[dwblas]

orig_string = "aa1aa2aa3"
output_string = ""
for letter in orig_string:
    if letter.isdigit() :
        output_string += "d"
    else:
        output_string += letter
print output_string