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...
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...
The switch-case in Python is a flow control structure that allows executing different blocks of code depending on the value of a variable. Unlike other languages, in Python it is not necessary to use the “break” keyword to exit a case. As the execution of a case will be automatically i...
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 ...
众所周知Python中是没有switch的,一般而言是用if-else来代替的,如C语言下的 switch (key) { case 'a': /* do_a */ break; case 'b': /* do_b */ break; case 'c': /* do_c */ break; } 1. 2. 3. 4. 5. 6. 7. 8.
上面的代码可以把 if 换成 switch。大多数语言都有 switch 语法，除了 Python 语言会强迫你自己写字典...
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...
Python switch-case语句的实现 -- 字典模拟实现 static void print_asru_status(int status, char *label) { char *msg = NULL; switch (status) { case 0: msg = dgettext("FMD", "ok and in service"); break; case FM_SUSPECT_DEGRADED: msg = dgettext("FMD", "service degraded, " "but ...
编写Java程序,输入年份和月份,使用 switch 结构计算对应月份的天数。 月份为 1、3、5、7、8、10、12 时,天数为 31 天。 月份为 4、6、9、11 时,天数为 30 天。 月份为 2 时,若为闰年,天数为 29 天,否则,天数为 28 天。 实现如下程序:
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...