import re
pattern = r"'Field':\s+'\[([0-9]+,\s*[0-9]+)]'"
s = "{'Port': '2', 'Array': '[0, 0]', 'Field': '[2,2]', 'foo': '[0, 0]' , 'bar': '[9, 9]'}"
m = re.search(pattern, s)
if m:
print(m.group(1))
aW1wb3J0IHJlCgpwYXR0ZXJuID0gciInRmllbGQnOlxzKydcWyhbMC05XSssXHMqWzAtOV0rKV0nIgoKcyA9ICJ7J1BvcnQnOiAnMicsICdBcnJheSc6ICdbMCwgMF0nLCAnRmllbGQnOiAnWzIsMl0nLCAnZm9vJzogJ1swLCAwXScgLCAnYmFyJzogJ1s5LCA5XSd9IgoKbSA9IHJlLnNlYXJjaChwYXR0ZXJuLCBzKQppZiBtOgogICAgcHJpbnQobS5ncm91cCgxKSkK