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[TOC]

# 內置函數

| 函數  | 描述  |  備注  |
|---|---|---|
| len(item)  | 計算容器中元素個數  |   |
| del(item)  | 刪除變量  | del有兩種方式  |
| max(item)  | 返回容器中元素最大值  | 如果是字典,只針對key比較  |
| min(item)  | 返回容器中元素最小值  | 如果是字典,只針對key比較  |
| cmp(item1,item2)  | 比較兩個值,-1小于/0相等/1大于  |  python3.x取消了cmp函數 |

注意:
字符串比較符合以下規則: `"0"<"A"<"a"`
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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