matrix = [[i*j for j in range(3)] for i in range(2)] # 等价于二维数组初始化 1. 2. 但需注意: 超过3层嵌套时可读性急剧下降 复杂逻辑应回归显式循环结构 二、循环控制的精微操作 2.1 break/continue的精确制导 在嵌套循环中,控制语句默认作用于最近层循环。要实现跨层跳转需借助标记变量或异常机制...
for-continue foriinrange(10):ifi <5:print("The loop is :",i)else:# continue的意思是,遇到continue就不执行循环内,下面的的代码continueprint("The end") loop套loop,两层loop foriinrange(1,6):print('\033[32;1mThe 1st loop:\033[0m', i)forjinrange(1,6):ifj >3:print(j)breakelse:...
Similarly, can use break to quit a loop, or use continue to skip over certain code. sort by key lst = [[1, 2], [2, 3]] lst.sort(key=lambda x: x[1]+x[0]) import itertools lst = [1, 2, 3] sum_list = itertools.accumulate(lst) assert for exception trap def main(s): n...
continue # 跳过count等于3时的打印 print(count) 循环控制语句 break:立即退出当前循环。 continue:跳过当前循环的剩余部分,并进入下一次循环。 else:可以在循环后使用,如果循环因为条件变为假而退出,则执行else块中的代码。 示例:else 语句 python for i in range(5): print(i) else: print("Loop finished")...
break Try it Yourself » Example Exit the loop whenxis "banana", but this time the break comes before the print: fruits = ["apple","banana","cherry"] forxinfruits: ifx =="banana": break print(x) Try it Yourself » The continue Statement ...
break vs. continue • break 结束整个循环语句(有多层嵌套循环时,仅跳出最内层循环)。到这一行该循环语句停止,break后面的循环语句不会执行,而是直接向下执行循环外的其他语句。 • continue 结束本次循环。回到循环的第一条语句开始下一次循环,本次循环中continue后面的循环语句不会被执行。 2. Indefinite loop...
# create listsfordab,tpose,other examplesdabs=[]tposes=[]other=[]fps_time=0# loop forever,reading webcam each timewhile True:ret_val,frame=vs.read()datum.cvInputData=frame opWrapper.emplaceAndPop([datum])# need to be able to see what's going on image = datum.cvOutputData cv2.put...
1.5.2 Loop Statements 1.5.3 While Statements 1.5.4 Break and continue Statements 1.6 Functions and Classes 1.6.1 Functions 1.6.2 Classes 1.6.3 Functional Programming 1.7 Using Python and Stata Together 1.7.1 Configurations 1.7.2 Call Stata...
()# Constant to assume string is Palindrome is_palindrome=True # Get the user's choice.choice=int(input('\nEnter your choice: '))# Perform the selected action.ifchoice==Continue:line=input("\nEnter a string: ")str_lower=re.sub("[^a-z0-9]","",line.lower())foriinrange(0,len(...
比与 if 语句的具有更多的共同点:try 语句的 else 子句在未出现异常时运行,循环的 else 子句在未出现 break 时运行。更多关于 try 语句和异常的内容,请参见 异常处理 continue 语句是从 C 中借鉴来的,它表示循环继续下一次迭代: >>> for num in range(2, 10): ... if num % == 0: @@...