python - 如何根据某些规则更改字符串？

Question

我有以下文本，每行有两个短语并用 "\t" 分隔

RoadTunnel    RouteOfTransportation
LaunchPad   Infrastructure
CyclingLeague   SportsLeague
Territory   PopulatedPlace
CurlingLeague   SportsLeague
GatedCommunity  PopulatedPlace

我想得到的是在单词之间加上_，结果应该是:

Road_Tunnel    Route_Of_Transportation
Launch_Pad  Infrastructure
Cycling_League  Sports_League
Territory   Populated_Place
Curling_League  Sports_League
Gated_Community Populated_Place

没有"ABTest"或"aBTest"这样的情况，有三个单词在一起的情况"RouteOfTransportation"我尝试了几种方法但没有成功。

我的一个尝试是:

textProcessed = re.sub(r"([A-Z][a-z]+)(?=([A-Z][a-z]+))", r"\1_", text)

但是没有结果

Answer 1

使用正则表达式和re.sub。

>>> import re
>>> s = '''LaunchPad   Infrastructure
... CyclingLeague   SportsLeague
... Territory   PopulatedPlace
... CurlingLeague   SportsLeague
... GatedCommunity  PopulatedPlace'''
>>> subbed = re.sub('([A-Z][a-z]+)([A-Z])', r'\1_\2', s)
>>> print(subbed)
Launch_Pad   Infrastructure
Cycling_League   Sports_League
Territory   Populated_Place
Curling_League   Sports_League
Gated_Community  Populated_Place

编辑:这是另一个，因为您的测试用例覆盖的范围不足以确定您到底想要什么:

>>> re.sub('([a-zA-Z])([A-Z])([a-z])', r'\1_\2\3', 'ABThingThing')
'AB_Thing_Thing'