34 lines
732 B
Python
34 lines
732 B
Python
#定义一个字典，由键值对组成
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alien_0 ={'color': 'green', 'points': 5}
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print(alien_0['color'])
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print(alien_0['points'])
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print(alien_0)
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#可为字典添加键值对
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alien_0['x_position'] = 0
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alien_0['y_position'] = 25
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print(alien_0)
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#也可直接修改字典中的值
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alien_0['color'] = 'yellow'
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print(alien_0)
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alien_0 = {'x_position': 0, 'y_position': 25, 'speed': 'medium'}
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print(f'original position: {alien_0['x_position']}')
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#向右移动 根据seed判断移动距离
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if alien_0['speed'] == 'slow':
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x_increment = 1
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elif alien_0['speed'] == 'medium':
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x_increment = 2
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else:
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x_increment = 3
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alien_0['x_position'] = alien_0['x_position'] + x_increment
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print(f'new position: {alien_0['x_position']}')
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