python regex split

input = "a 4,9,9,b,c 1,2,abcdef,ff,d 1,e 2,ff";

alpha = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"];
numbers = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9"];

items = [];
item = "";
lock = False;

for i in range(0, len(input)):

    char = input[i];

    if char in alpha:

        if lock == False:

            item += char;

        else:

            if item.endswith(","):

                item = item[0: len(item) - 1];

            items.append(item);

            item = "";
            lock = False;

            item += char;

    elif char == ",":

        if lock == False:
            items.append(item);

            item = "";
            lock = False;

        else:

            item += char;

    elif char == " ":

        item += char;

        lock = True;

    elif char in numbers:

        item += char;

    if i == len(input) - 1:

        items.append(item);


for i in range (0, len(items)):

    print(str(i) + "=" + str(items[i]));

0=a 4,9,9
1=b
2=c 1,2
3=abcdef
4=ff
5=d 1
6=e 2
7=ff

import re;

input = "a 4,9,9,b,c 1,2,abcdef,ff,d 1,e 2,ff";

compile_num = re.compile("\d,[a-z]");

compile_alpha = re.compile("[a-z],[a-z]");

matches_num = compile_num.finditer(input);

matches_alpha = compile_alpha.finditer(input);

for match in matches_num:

    input = input[0:match.start() + 1] + ";" + input[match.end() - 1:];

for match in matches_alpha:

    input = input[0:match.start() + 1] + ";" + input[match.end() - 1:];

print("fix=" + str(input));

items = input.split(";");

for i in range(0, len(items)):

    print(str(i) + "=" + str(items[i]));

fix=a 4,9,9;b;c 1,2;abcdef;ff;d 1;e 2;ff
0=a 4,9,9
1=b
2=c 1,2
3=abcdef
4=ff
5=d 1
6=e 2
7=ff