readlines with line number support?

[Nikhil]

Hi,

I am reading a file with readlines method of the filepointer object 
returned by the open function. Along with reading the lines, I also need 
to know which line number of the file is read in the loop everytime.
I am sure, the line should have the property/attribute which will say 
the line number of the file.

If there is none, do I have to end up using the counter in the loop?

fp = open("file", "r")
lineno = 0
for line in fp.readlines():
	print "line number: " + lineno + ": " + line.rstrip()
         lineno = lineno + 1

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Thanks,
Nikhil