习惯了java的思想.用java的思想来获取python元组中的数据.结果出错了. yuanzu_s = ("one", "two", "three", "four",); print(yuanzu_s[0]); print(len(yuanzu_s)); print(len(yuanzu_s[0])); i = 0; for i in yuanzu_s: print(len(yuanzu_s[i])); 报一个这样的错误:
方法1:自定义异常 # -*- coding:utf-8 -*- """ 功能:python跳出循环 """ # 方法1:自定义异常 class Getoutofloop(Exception): pass try: for i in range(5): for j in range(5): if i == j == 2: raise Getoutofloop() else: print i, '----', j except Getoutoflo
break 语句可以跳出 for 和 while 的循环体.continue语句被用来告诉Python跳过当前循环块中的剩余语句,然后继续进行下一轮循环.用break continue 写一个乘法表下面就用break和continu写了乘法表 i = 0 while True: i = i + 1 for j in range (1,10): if j >i: continue elif j == i : print('%i X %i = %i '%(j,i,j*i)) else: print(