正規表現

reモジュールを使う

# -*- coding: utf-8 -*-

import re

s = "10 0x14 30 0x28 50 0x3c"
pattern = "[0][xX][0-9a-fA-F]+"

# パターンを正規表現オブジェクトにコンパイルする
re_obj = re.compile(pattern)

# 結果を返す
match = re_obj.match(s)
search = re_obj.search(s)
split = re_obj.split(s)
findall = re_obj.findall(s)
finditer = re_obj.finditer(s)
# subとsubnの引数で渡す
# 16進数の文字列を10進数の文字列に変換し返す
def repl(match_obj):
    return str(int(match_obj.group(), 16))
sub = re_obj.sub(repl, s)
subn = re_obj.subn(repl, s)

print "string='%s'" % s
print "pattern='%s'" % pattern
print
print "match:", match
print "search: start=%d, end=%d, group='%s'" % (search.start(), search.end(), search.group()) 
print "split:", split
print "findall:", findall
print "finditer:"
for match_obj in finditer:
    print "    start=%d, end=%d, group='%s'" % (match_obj.start(), match_obj.end(), match_obj.group())
print "sub: '%s'" % sub
print "subn:", subn

実行すると

string='10 0x14 30 0x28 50 0x3c'
pattern='[0][xX][0-9a-fA-F]+'

match: None
search: start=3, end=7, group='0x14'
split: ['10 ', ' 30 ', ' 50 ', '']
findall: ['0x14', '0x28', '0x3c']
finditer:
    start=3, end=7, group='0x14'
    start=11, end=15, group='0x28'
    start=19, end=23, group='0x3c'
sub: '10 20 30 40 50 60'
subn: ('10 20 30 40 50 60', 3)

詳細はドキュメントで

• 4.2 re -- 正規表現操作