我正在使用 Python(实际上是 pl/python)在一个非常大的文本对象中连续查找一系列正则表达式匹配项。这工作正常!每次匹配都是不同的结果,每次替换都会是不同的结果,最终基于循环内的查询。
目前,我很乐意用任何文本替换 rx 中的每个匹配项,这样我才能理解它是如何工作的。有人可以给我一个替换匹配文本的明确示例吗?
match.group(1)似乎正确地指示了匹配的文本;这是做事的方式吗?
plan3 = plpy.prepare("SELECT field1,field2 FROM sometable WHERE indexfield = $1",
[ "text" ])
rx = re.finditer('LEFT[A-Z,a-z,:]+RIGHT)', data)
# above does find my n matches...
# ------------------- THE LOOP ----------------------------------
for match in rx:
# below does find the 6 match objects - good!
# match.group does return the text
plpy.notice("-- MATCH: ", match.group(1))
# must pull out a substring as the 'key' to an SQL find (a separate problem)
# (not sure how to split based on the colon:)
keyfield = (match.group(1).split, ':')
plpy.notice("---------: ",kefield)
try:
rv = plpy.execute(plan3, [ keyfield ], 1 )
# --- REPLACE match.group(1) with results of query
# at this point, would be happy to replace with ANY STRING to test...
except:
plpy.error(traceback.format_exc())
# ------------------- ( END LOOP ) ------------------------------