problem about split a string

Question

I wrote a program to read a registry entry from a file. And the entry looks like this:

reg='HKEY_LOCAL_MACHINE\SOFTWARE\TT\Tools\SYS\exePath' #it means rootKey=HKEY_LOCAL_MACHINE, subKey='SOFTWARE\TT\Tools\SYS', property=exePath

I want to read this entry from the file and break it into rootKey, subKey and property. Apparently, I can do it this way:

rootKey = reg.split('\\', 1)[0]
subKey = reg.split('\\', 1)[1].rsplit('\\', 1)[0]  #might be a stupid way
property = reg.rsplit('\\, 1)[1]

Maybe the entry is a stupid one, but any better way to break it into parts like above?

Looks like there is a similar question answered here stackoverflow.com/questions/5833441/… — severb
– severb, Commented Aug 18, 2011 at 13:49

linbo · Accepted Answer · 2011-08-18 13:58:24Z

4

import re

t=re.search(r"(.+?)\\(.+)\\(.+)", reg)
t.groups()
('HKEY_LOCAL_MACHINE', 'SOFTWARE\\TT\\Tools\\SYS', 'exePath')

answered Aug 18, 2011 at 13:58

linbo

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Comments

Mark Longair · Accepted Answer · 2011-08-18 13:41:18Z

2

How about doing the following? There's no need to call .split() so many times, anyway...

s = reg.split('\\')
property = s.pop()
root_key = s.pop(0)
sub_key = '\\'.join(s)

answered Aug 18, 2011 at 13:34

Mark Longair

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Willi Ballenthin · Accepted Answer · 2012-03-22 17:28:48Z

0

I like to use partition over split when I can, because partition ensures each of the returned tuple elements is a string.

root_key, _, s       = reg.partition("\\")
_, sub_key, property = s.rpartition("\\") # note, _r_partition

answered Mar 22, 2012 at 17:28

Willi Ballenthin

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