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feat: Definition of function default parameters
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def print_info(name, gender=True):
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gender_text = "男生"
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if not gender:
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gender_text = "女生"
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print("%s 是 %s" % (name, gender_text))
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# 假设班上的同学,男生居多,所以将默认值设置为男生
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# 提示:在指定缺省参数的默认值时,应该使用最常见的值作为默认值!
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print_info("小明")
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print_info("小红", False)

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