Python Practice Example 90

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Problem:List usage example.

Program analysis:None.

Example (Python 2.0+)

#!/usr/bin/python # -*- coding: UTF-8 -*- #list # Create a new list testList=[10086,'China Mobile',[1,2,4,5]] # Access list length print len(testList) # Up to the end of the list print testList[1:] # Add elements to the list testList.append('i\'m new here!') print len(testList) print testList[-1] # Pop the last element of the list print testList.pop(1) print len(testList) print testList #list comprehension # Introduced later, skip for now matrix = [[1, 2, 3], [4, 5, 6], [7, 8, 9]] print matrix print matrix[1] col2 = [row[1] for row in matrix]#get a column from a matrix print col2 col2even = [row[1] for row in matrix if row[1] % 2 == 0]#filter odd item print col2even

The output of the above example is:

3
['\xe4\xb8\xad\xe5\x9b\xbd\xe7\xa7\xbb\xe5\x8a\xa8', [1, 2, 4, 5]]
4
i'm new here!
中国移动
3
[10086, [1, 2, 4, 5], "i'm new here!"]
[[1, 2, 3], [4, 5, 6], [7, 8, 9]]
[4, 5, 6]
[2, 5, 8]
[2, 8]

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