擅长:python、mysql、java
<p>您可以使用闭包和所选匹配组的开始/结束索引执行所需操作:</p>
<pre><code>import re
from functools import partial
pattern = '^[\w-]*_(?P<pos>[A-Z]\d{2})_T\d{4}(?P<fID>F\d{3})L\d{2}A\d{2}(?P<zID>Z\d{2})(?P<cID>C\d{2})\.tif$'
filename = '151006_655866_Z01_T0001F015L01A02Z01C03.tif'
def replace_closure(subgroup, replacement, m):
if m.group(subgroup) not in [None, '']:
start = m.start(subgroup)
end = m.end(subgroup)
return m.group()[:start] + replacement + m.group()[end:]
subgroup_list = ['pos', 'fID', 'zID', 'cID']
replacement = ' -'
for subgroup in subgroup_list:
print re.sub(pattern, partial(replace_closure, subgroup, replacement), filename)
</code></pre>
<p><strong>输出</strong>:</p>
^{pr2}$
<p>在线实现可用<a href="http://ideone.com/hmPZMW" rel="nofollow">here</a></p>