Interview question for pratheeban

string_int_items_sum.py

# Write a function that takes a list of string and returns the sum of the list items that represents an integer.

def sum_up_int_terms(string):
    sum = 0
    for item in string:
        try:
            sum += int(item)
        except:
            pass
    return sum

print(sum_up_int_terms('a47b8'))

# Write above in a recursive setup

def rec_sum_up_int_terms(string):
    if len(string) == 0:
        return 0
    try:
        return int(string[0]) + rec_sum_up_int_terms(string[1:])
    except:
        try:
            return rec_sum_up_int_terms(string[1:])
        except:
            return 0
        
# Should evaluate to 7 * 7 = 49 (tests all cases)
print(rec_sum_up_int_terms('a') + rec_sum_up_int_terms('7') + rec_sum_up_int_terms('77') +
      rec_sum_up_int_terms('a7') + rec_sum_up_int_terms('7a') + rec_sum_up_int_terms('a77a'))