Voici un exemple simple dematch-caseen action. Classons les jours de la semaine en deux catégories : les week-ends et les jours de la semaine : # Take user input for the day of the weekday=input("Enter the day of the week: ").capitalize()# Match the day to predefined patternsmatch...
if语句的一般形式如下所示:if condition_1: statement_block_1elif condition_2: statement_block_2else: statement_block_3 如果 "condition_1" 为 True 将执行 "statement_block_1" 块语句 如果 "condition_1" 为False,将判断 "condition_2"如果"condition_2" 为 True 将执行 "statement_block_2...
在上一篇Python自动化测试系列文章:Python自动化之Python常用运算符,主要介绍Python中的算术运算符、赋值运算符、比较运算符、布尔运算符、成员运算符、身份运算符。 今天我们主要介绍Python中条件语句的单分支结构、双分支结构、多分支结构、嵌套if。 一 什么是条件语句? Python中的条件语句简单来说, 根据不同结果执行...
Structural pattern matching has been added in the form of a match statement and case statements of patterns with associated actions. Patterns consist of sequences, mappings, primitive data types as well as class instances. Pattern matching enables programs to extract information from complex data type...
The Python programming language does not have a built in switch/case control structure as found in many other high level programming languages. It is thought by some that this is a deficiency in the language, and the control structure should be added. This paper demonstrates that not only is...
statement_block_1elifcondition_2: ## 该分支可选,可以0个或多个 statement_block_2else:## 该分支可选statement_block_3 if 语句包含零个或多个elif子句,及可选的else子句。关键字 'elif' 是 'else if' 的缩写,适用于避免过多的缩进。可以把if...elif...elif... 序列看作是其他语言中switch或case语...
classPythonSwitchStatement:defswitch(self,month): default="Invalidmonth"returngetattr(self,'case_'+str(month),lambda:default)()defcase_1(self):return"January"defcase_2(self):return"February"defcase_3(self):return"March"defcase_4(self):return"April"defcase_5(self):return"May"defcase_6(self...
但是,在 Python 中,我们看不到 switch-case 或者相近的语法结构,这是为什么呢?2、Python 为什么不支持 switch?官方文档中有一篇 FAQ 包含了这个问题:Why isn’t there a switch or case statement in Python?FAQ 即 Frequently Asked Questions 的缩写,表示常见问题,官方列了 27 个常见问题,完整清单在此...
setup="import math"statement="math.factorial(100)"elapsed_time=timeit.timeit(setup=setup,stmt=statement,number=1000)print(f"Average execution time: {elapsed_time/1000:.6f} seconds") 1. 2. 3. 4. 5. 6. 7. timeit模块提供了一种简便的方法来测量小段代码的执行时间,帮助开发者评估代码性能,进行...
if<condition>:<statement><statement>else:<statement><statement> 执行过程如下图所示: 如果条件语句< condition >为真,if后面的语句就被执行,如果为假,则执行else下面的语句块。条件语句的格式为:< expr >< relop >< expr >,其中< expr >为表达式、为关系操作符。例如:a >= 10、b != 5等。