delineating by comma where commas inside quotation marks don't count

[Junior]

I want to open a text file for reading and delineate it by comma.  I also 
want any data
surrounded by quotation marks that has a comma in it, not to count the 
commas inside the
quotation marks

if the file testfile.txt contains the following;

5,Tuesday,"May is a spring month",Father's Day
1,Saturday,"June,July and August",Independance Day


and I write the following program

fname = open('testfile.txt', 'r')
ct=1
while ct != 3:
    rd=(fname.readline())
    filedata=rd.split(',')
    print "var2=",filedata[2]
    ct +=1

fname.close

filedata[2] will = "May is a spring month"; on the first pass and

filedata[2] will = "June;  on the second pass

How do I get filedata[2] to = "June,July and August" on the second pass

and filedata[3] to = Independance Day