enumfblocktype{WHILE_LOOP,FOR_LOOP,LOOP_LOOP,TRY_EXCEPT,FINALLY_TRY,FINALLY_END,WITH,ASYNC_WITH,HANDLER_CLEANUP,POP_VALUE,EXCEPTION_HANDLER,EXCEPTION_GROUP_HANDLER,ASYNC_COMPREHENSION_GENERATOR}; 并在第4050行添加如下代码 caseLoop_kind:returncompiler_loop(c,s); 再在第3232行添加如下代码 staticintcom...
Then you use Python’s built-innext()to get the next value fromenum_instance. The first value thatenum_instancereturns is a tuple with the count0and the first element fromvalues, which is"a". Callingnext()again onenum_instanceyields another tuple, this time with the count1and the second...
Loop->>Enum: 开始遍历枚举类型 Enum->>Loop: 返回第一个枚举值 Loop->>Print: 打印枚举值 Print->>Loop: 继续下一个循环 Loop->>Enum: 返回下一个枚举值 Enum->>Loop: 返回第二个枚举值 Loop->>Print: 打印枚举值 Print->>Loop: 继续下一个循环 Loop->>Enum: 返回下一个枚举值 Enum->>Loop: ...
Python中的枚举类型(Enum)和迭代器(Iterator)提供了更高级的迭代控制。 6.1 枚举类型的应用 # 示例代码 from enum import Enum class Color(Enum): RED = 1 GREEN = 2 BLUE = 3 for color in Color: print(color) 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 枚举类型使得代码更加清晰和可读,尤其在需要...
class Color(str, Enum): RED = 'stop' GREEN = 'go' YELLOW = 'get ready' Better try except #1 try: something() except Exception as e: print(f'error is {str(e)}') pass # 2 - better import traceback try: func(data) except Exception: ...
We iterate over enum members in a for loop. for season in Season: print(season.name, season.value) Here we print their names and values. $ python main.py Season.SPRING Season.SUMMER Season.AUTUMN Season.WINTER SPRING 5 SUMMER 6 AUTUMN 7 ...
fromenumimportEnum classCOLOR(Enum): YELLOW=1 #YELLOW=2#会报错 GREEN=1#不会报错,GREEN可以看作是YELLOW的别名 BLACK=3 RED=4 print(COLOR.GREEN)#COLOR.YELLOW,还是会打印出YELLOW foriinCOLOR:#遍历一下COLOR并不会有GREEN print(i) #COLOR.YELLOW\nCO...
For example, say that you want an enumeration that supports integer comparison. In this case, you can use the built-in int type as a mixin when defining your enum: Python >>> from enum import Enum >>> class Size(int, Enum): ... S = 1 ... M = 2 ... L = 3 ... XL...
进入主事件循环(main loop)。 下面的代码演示了如何使用tkinter做一个简单的GUI应用。 代码语言:javascript 代码运行次数:0 运行 AI代码解释 importtkinterimporttkinter.messagebox defmain():flag=True # 修改标签上的文字 defchange_label_text():nonlocal flag ...
HTTPStatus = Enum('Status', 'ok not_found error') # 自定义异常用于包装其他HTTP货网络异常,并获取country_code,以便报告错误 class FetchError(Exception): def __init__(self, country_code): self.country_code = country_code @asyncio.coroutine ...