37 lines
1022 B
Python
37 lines
1022 B
Python
# arrays/PythonLists.py
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# (c)2017 MindView LLC: see Copyright.txt
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# We make no guarantees that this code is fit for any purpose.
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# Visit http://OnJava8.com for more book information.
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aList = [1, 2, 3, 4, 5]
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print(type(aList)) # <type 'list'>
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print(aList) # [1, 2, 3, 4, 5]
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print(aList[4]) # 5 Basic list indexing
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aList.append(6) # lists can be resized
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aList += [7, 8] # Add a list to a list
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print(aList) # [1, 2, 3, 4, 5, 6, 7, 8]
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aSlice = aList[2:4]
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print(aSlice) # [3, 4]
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class MyList(list): # Inherit from list
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# Define a method; 'this' pointer is explicit:
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def getReversed(self):
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reversed = self[:] # Copy list using slices
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reversed.reverse() # Built-in list method
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return reversed
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# No 'new' necessary for object creation:
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list2 = MyList(aList)
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print(type(list2)) # <class '__main__.MyList'>
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print(list2.getReversed()) # [8, 7, 6, 5, 4, 3, 2, 1]
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output = """
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<class 'list'>
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[1, 2, 3, 4, 5]
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5
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[1, 2, 3, 4, 5, 6, 7, 8]
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[3, 4]
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<class '__main__.MyList'>
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[8, 7, 6, 5, 4, 3, 2, 1]
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"""
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