import [im' pɔ:t] 导入,输入 if [if] 如果 else [els] 否则 switch [switʃ] 判断语句 case [keis] 实例,情况 break [breik] 退出 continue [kən 'tinju] 跳出...继续 return [ri tə:n] 返回 default [di'fɔ:lt] 默认的 while [wail] 当……的时候 interpreter [ɪnˈt...
/usr/bin/python # Filename: if.py number=23 guess=int(raw_input('Enter an integer : ')) ifguess==number: print'Congratulations, you guessed it.'# New block starts here print"(but you do not win any prizes!)"# New block ends here elifguess < number: print'No, it is a little ...
lower() == 'iphone') num1, num2, num3 = 10, 20, 20 if num1 > num2: print('num1 is greater than num2') else: print('num1 is less than num2') print('num2 greater than num3?', num2>num3) print('num2 equals num3?', num2==num3, '\nnum2 greater or equal to num...
num = [1, 4, -5, 10, -7, 2, 3, -1] filtered_and_squared = []for number in num: if number > 0: filtered_and_squared.append(number ** 2) print filtered_and_squared# [1, 16, 100, 4, 9] 而如果使用filter、lambda和map函数,则能够将代码大大简化: num = [1, 4, -5, 10, ...
“equals” : 对于值类型而言, 内存相等才返回true。 对于引用类型而言,指向同一个引用才算相等。 但是比较特殊的是字符串String,是一个特殊的引用型类型,在C#语言中,重载了string的equals()方法,使string对象用起来就像是值类型一样。 python中的 ==
题目1:Given an integral number, determine if it's a square number。(7级) def is_square(n): if (n<0): return False for i in range(int(n**0.5)+1): a = i*i if (a == n): return True return False 1. 2. 3. 4.
= 1.0): hits = hits+1 pi = 4*(hits/DARTS)print("Pi的值是:%s"%pi)print("程序运行时间是 %-5.5ss"%clock()) ##寻找素数 for n in range(2,100): for x in range(2,n): if n % x == 0: print(n, "equals", x, "*", n//x) break; else: print(n, "is a prime number...
if num%i == 0: #to determine the first factor j=num/i #to calculate the second factor print '%d equals %d * %d' % (num,i,j) break #to move to the next number, the #first FOR else: # else part of the loop print num, 'is a prime number' ...
要找到$I文件,我们在tsk_util实例上调用recurse_files()方法,指定要查找的文件名模式,开始搜索的path和用于查找文件名的字符串logic。logic关键字参数接受以下值,这些值对应于字符串操作:startswith,endswith,contains和equals。这些指定了用于在扫描的文件和文件夹名称中搜索我们的$I模式的字符串操作。
(1) lexer = lex.lex # 定义语法规则 def p_statement_assign(p): 'statement : NAME EQUALS NUMBER' p[0] = (p[1], int(p[3])) def p_error(p): print(f"语法错误: {p.value}") parser = yacc.yacc # 输入测试 data = 'x = 42' lexer.input(data) result = parser.parse(data) ...