>>> myinfor = {"name":"qiwsir","site":"qiwsir.github.io","lang":"python"}
>>> dict(zip(myinfor.values(),myinfor.keys()))
{ 'qiwsir': 'name', 'python': 'lang', 'qiwsir.github.io': 'site'}
>>> seasons = ['Spring', 'Summer', 'Fall', 'Winter']
>>> list(enumerate(seasons))
[(0, 'Spring'), (1, 'Summer'), (2, 'Fall'), (3, 'Winter')]
>>> list(enumerate(seasons, start=1))
[(1, 'Spring'), (2, 'Summer'), (3, 'Fall'), (4, 'Winter')]
>>> squares = [x**2 for x in range(1,10)]
>>> squares
[1, 4, 9, 16, 25, 36, 49, 64, 81]