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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def removeDuplicates(inFileName, outFileName) : 	"""removes duplicated lines from a 'inFileName' CSV file, the results are witten in 'outFileName'"""

	f = open(inFileName)
	legend = f.readline()
	
	data = ''
	h = {}
	h[legend] = 0
	
	lines = f.readlines()
	for l in lines :
		if not h.has_key(l) :
			h[l] = 0
			data += l
			
	f.flush()
	f.close()
	f = open(outFileName, 'w')
	f.write(legend+data)
	f.flush()
	f.close()