Juho Schultz wrote:
> I think return values should be used for communication between
> functions. Maybe something like this could work for you (not tested).
>
> def checkForRpm(rpmname):
> # <cut start of function>
> # Strings with 0 lenght are False
> if output:
> print output
> else:
> print rpmname + ' is not installed'
> return output
>
> def checkPreReqs():
> missingRpms = []
> for requiredRpm in listOfRpms:
> if not checkForRpm(requiredRpm):
> missingRpms.append(requiredRpm)
> # you could also do this by a list comprehension
> missingRpms = [reqRpm for reqRpm in listOfRpms if not
> checkForRpm(reqRpm)]
> # or you could use the builtin function filter() - see
> filter.__doc__ for that
Thanks Juho. I got the logic to workout the problem and I was able to
solve it. There was bit alteration of my code was required. Its working
now. Thanks.
---
def checkForRpm(rpmname):
''' Check for the presence of the RPM. '''
cin,cout,cerr = os.popen3('rpm -q ' + rpmname)
rpmStatus = cout.read()
print rpmStatus,
return rpmStatus
def preReqCheckRpms():
''' Check for the required RPMS '''
listOfRpms =
['firefox','senthil','binutils','gcc','cpp','glibc-devel','glibc-headers','glibc-kernheaders','compat-db','compat-gcc','compat-gcc-c++','compat-libstdc++','compat-libstdc++-devel','gnome-libs','openmotif21','setarch']
missingRpms = []
for requiredRpm in listOfRpms:
if checkForRpm(requiredRpm).find('is not installed') >
0:
missingRpms.append(requiredRpm)
if missingRpms:
print 'The following RPMS are not installed:'
for eachMissingRpm in missingRpms:
print eachMissingRpm
print 'Please install them for the installation to
continue.'
sys.exit(-1)
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