1 data = http://www.mamicode.com/[[1, 2], [3, 2], [5]]2 3 for lst in data:4     for item in lst:5         print item

1 data = http://www.mamicode.com/[[1, 2], [3, 2], [5]]2 3 def flatten(nested):4     for lst in nested:5         for element in lst:6             yield element7 8 for item in flatten(data):9     print item

 1 data_1 = [1, 3] 2 data_2 = [[3, 1], [4, 1]] 3 data_3 = [1, 2] 4  5 data =http://www.mamicode.com/ [data_1, data_2, data_3] 6  7 def flatten(nested): 8     try: 9         for lst in nested:10             for item in flatten(lst):11                 yield item12     except:13         yield nested14 15 for item in flatten(data):16    print item

 1 data_1 = [1, 3] 2 data_2 = [[3, 1], [4, 1]] 3 data_3 = [1, 2] 4  5 data =http://www.mamicode.com/ [data_1, data_2, data_3] 6  7 def foo(data): 8     for item in data: 9         if type(item) is type(1):10             print item,11         else:12             foo(item)13 14 foo(data)