classswitch_case(object):defcase_to_function(self,case,arg1,arg2): func_name ='case_func_'+str(case)try: method =getattr(self,func_name)returnmethod(arg1,arg2)exceptAttributeError:return'No func found in case list,do default action here'defcase_func_add(self,arg1,arg2): temp = arg1 ...
但是match-case语法能做的事情远超 C/Go 这些语言里的switch-case,它其实是 Scala, Erlang 等语言里面的match-case,它支持复杂的模式匹配,接下来我会通过多个模式的例子详细演示这个新的语法的灵活性和 pythonic。 字面量 (Literal) 模式 上面的例子就是一个字面量模式,使用 Python 自带的基本数据结构,如字符串...
result= 1003returnresult#Press the green button in the gutter to run the script.if__name__=='__main__': print_hi('good day') main() product_code= func_switch_case("bag")print(f"bag的产品编号:{product_code}") product_code= func_switch_case2("pencil")print(f"case2_pencil的产品...
In Python, dictionaries are a collection of key-value pairs where each key is unique. We can leverage this feature to create a switch statement by using keys as case labels and functions or lambda expressions as the associated code blocks. Here’s an example of how to implement a simple ...
Python 中的switch-case Python中是没有switch-case语句的 —— 因为完全可以用if else模拟?根据python哲学,于是switch-case就没有了。 可以用字典和lambda模拟一个简单的switch-case。个人觉得这个方法有趣程度大于实用程度。 #FileName:pysw.py sw = {...
Python 刚发明的时候，每一个 bytecode 的确需要进行一次 switch 跳转。而 C 语言的 switch 语句会导致...
Then, it will compare every value with the user_input. In the code, the user gavefive as an inputand got the output “You selected May month.” Python Switch Case by Calling a Function Here, we will define a function and return the statement based on the user input to work like a ...
While the match-case statement is a powerful tool, its impact on the performance of Python code, particularly in large-scale applications, should be considered. In scenarios with a large number of cases, or complex pattern matching, performance can potentially be impacted. Profiling and testing yo...
("成绩等级为:", grade)使用 switch-case 语句在 Python 中无法直接实现,但可以通过字典映射来模拟类似的效果:pythonCopy codescore = float(input("请输入成绩: "))grade_dict = { (90, 100): "优秀", (80, 89): "良好", (70, 79): "中", (60, 69): "及格", (0, 59): "不及格"}...
def check(j :dict): match j: case {'code': 0, 'msg': msg}: print(f'msg: {msg}') case {'code': 0, **kv}: print(f'remain kv: {kv}') case {'code': _}: print(f'BAD j: {j}') check({'code': 0, 'msg': 'success'}) # msg: success check({'code': 0, 'id'...