Appending N/A to blank strings

[mott3510]

I have a list of numbers imported from excel, an example line looks like this...

70609,86,91,,66 ,66,

I would like a N/A to be inserted in between the two commas and after the last one.
This is the code I have so far, but I haven't gotten it to work.

f = open("C:\users\cory\desktop\code\Verification.csv")
dd = {}
keys = f.readline().strip().split(',')

for key in keys:
    dd.setdefault(key, [])

for line in f:
	elements = line.strip().split(',')
	for i, item in enumerate(elements):
		if element == "":
			dd[keys[i]].append("N/A")			
		else:
			dd[keys[i]].append(int(item))
f.close()
 
for key in keys:
	print "%s: %s" % (key, dd[key])

[bvdet]

You are close. Instead of

        if element == "":

use this:

        if item == "":

OR

        if not item:

[mott3510]

Ah. So close! Thanks!