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chenguohuichenguohui
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Finished chapter 4
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‎chap04/allMyCats1.py

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print('Enter the name of cat 1:')
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catName1 = input()
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print('Enter the name of cat 2:')
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catName2 = input()
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print('Enter the name of cat 3:')
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catName3 = input()
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print('Enter the name of cat 4:')
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catName4 = input()
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print('Enter the name of cat 5:')
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catName5 = input()
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print('Enter the name of cat 6:')
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catName6 = input()
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print('The cat names are:')
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print(catName1 + ' ' + catName2 + ' ' + catName3 + ' ' + catName4 + ' ' + catName5 + ' ' + catName6)

‎chap04/allMyCats2.py

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catNames = []
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while True:
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print('Enter the name of cat ' + str(len(catNames) + 1) + ' (Or enter nothing to stop.):')
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name = input()
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if name == '':
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break
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catNames = catNames + [name] # list concatenation
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print('The cat names are:')
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for name in catNames:
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print(' ' + name)

‎chap04/commaList.py

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def commaList(items):
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ret = ''
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for item in items[:-1]:
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ret += item + ', '
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return ret + 'and ' + items[-1]
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spam = ['apples', 'bananas', 'tofu', 'cats']
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print(commaList(spam))

‎chap04/magic8Ball2.py

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import random
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messages = ['It is certain',
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'It is decidedly so',
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'Yes definitely',
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'Reply hazy try again',
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'Ask again later',
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'Concentrate and ask again',
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'My reply is no',
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'Outlook not so good',
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'Very doubtful']
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print(messages[random.randint(0, len(messages) - 1)])

‎chap04/passingReference.py

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def eggs(someParameter):
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someParameter.append('Hello')
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spam = [1, 2, 3]
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eggs(spam)
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print(spam)

‎chap04/printGrid.py

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def printGrid(grid):
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for y in range(6):
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for x in range(9):
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print(grid[x][y], end='')
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print()
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grid = [['.', '.', '.', '.', '.', '.'],
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['.', 'O', 'O', '.', '.', '.'],
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['O', 'O', 'O', 'O', '.', '.'],
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['O', 'O', 'O', 'O', 'O', '.'],
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['.', 'O', 'O', 'O', 'O', 'O'],
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['O', 'O', 'O', 'O', 'O', '.'],
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['O', 'O', 'O', 'O', '.', '.'],
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['.', 'O', 'O', '.', '.', '.'],
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['.', '.', '.', '.', '.', '.']]
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printGrid(grid)

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