regex - Extracting Data with Python Regular Expressions

Question

I am having some trouble wrapping my head around Python regular expressions to come up with a regular expression to extract specific values.

The page I am trying to parse has a number of productIds which appear in the following format

"productId":"111111"

I need to extract all the values, 111111 in this case.

Answer 1

t = ""productId":"111111""
m = re.match("W*productId[^:]*:D*(d+)", t)
if m:
    print m.group(1)

meaning match non-word characters (W*), then productId followed by non-column characters ([^:]*) and a :. Then match non-digits (D*) and match and capture following digits ((d+)).

Output

111111