Re: Sample code using rpm-objects (Iterative Delete)

On Wed, 2005-08-31 at 09:13, Adam T. Gautier wrote:
> Below is the code I used to iterate and delete packages from the RPM 
> database.  I have been hacking around with the code and this should 
> work, I have used it, but should be seen as just an example.
> 

since you said you were new to python some style comments are included.


> def removeHeader(header):
>     ''' Removes all require map references for the given header'''
>     # Loop through what header requires.  This is more efficent than
>     # looping through the require map of headers
>     for require in header.getRequires():
>         # Get the list headers that require the same requirement of the
>         # header given
>         requires = require_map_of_headers[require]
>         # Remove the header given
>         requires.remove(header)
>         print "Removed required ("+key+") dependancy of header("+\
>               str(header.getName())+")"
>         # If there are no more headers that need this requirement. remove
>         # the requirement
>         if(0==len(requires)):

You don't need to put your if statements in parens. It's noted as a
common mistake and generally bad style in various guides I've read.

>         rpmdb.erase(str(header.getName()))
>         print "Removed package("+str(header.getName())+\
>               "-"+str(header.getVersion())+"-"+\
>               str(header.getRelease())+")"

Doing this output with format strings %s % somevariable is a lot easier
to read and follow.

-sv