How can I optimize this Python code?

udfs.py

from pig_util import outputSchema
import sys, os, re

@outputSchema('matches:bag{t:tuple(name:chararray)}') # I am a pig schema
def match_names(one_name, all_names): #all_names is an array with 150,000 string elements
  match_pairs = []
  for name_tuple in all_names:
    name = name_tuple[0]
    match = one_name.find(name)
    if match >= 0:
      # other operations tha can't be optimized
      # ...
      match_pairs.append(name)
    else:
      pass # no match
  return match_pairs