python read file into a list

1text_file = open("filename.dat", "r")
2lines = text_file.readlines()
3print lines
4print len(lines)
5text_file.close()

1# read file in a string list
2with open(fileName) as f:
3	lineList = f.readlines()
4	

1f = open(filename, "r")
2   listItems = f.read().splitlines()
3

1f = open(filename, "r")
2   listItems = f.read().splitlines()