Chad Kellerman wrote:
Greetings,
I have some code that I wrote and know there is a better way to
write it. I wonder if anyone could point me in the right direction
on making this 'cleaner'.
I have two lists: liveHostList = [ app11, app12, web11, web12, host11 ]
stageHostList = [ web21,
web22, host21, app21, app22 ]
I need to pair the elements in the list such that:
app11 pairs with app21
app12 pairs with app22
web11 pairs with web21
web12 pairs with web22
host11pairs with host21
each time I get the list I don't know the order, and the lists
will grow over time. (hosts will be added in pairs. app13 to
liveHostList and app23 to stageHostList, etc)
Anyways this is what I have. I think it can be written better with
map, but not sure. Any help would be appreciated.
import re
for liveHost in liveHostlist:
nameList = list(liveHost)
clone = nameList[-1]
di = nameList[-2]
generic = liveHost[:-2]
for stageHost in stageHostList:
if re.match( generic + '.' + clone, stageHost ):
print "Got a pair: " + stageHost + liveHost
Thanks again for any suggestions,
Chad
So you recognise a pair by them having the same 'key', which is:
name[ : -2] + name[-1 : ]
Therefore you can put one of the lists into a dict and look up the name
by its key:
liveHostDict = dict((liveHost[ : -2] + liveHost[-1 : ], liveHost)
for liveHost in liveHostList)
for stageHost in stageHostList:
key = stageHost[ : -2] + stageHost[-1 : ]
liveHost = liveHostDict[key]
print "Got a pair: %s %s" % (stageHost, liveHost)
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