sample = [1, ["another", "list"], ("a", "tuple")] membernum = [1,2, "冰原狼", 90, "雄鹿", "狮子"] 元组(tuple)数组与list不同的是list元素长度都可被修改,数组中的元素和长度是不可以被修改的,元组是不可变的一维数组,数组中第一个元素索引值(下标)为0,使用负数索引值能够从后向前访问...
That includes another list. A list can contain sublists, which in turn can contain sublists themselves, and so on to arbitrary depth.Consider this (admittedly contrived) example:>>> x = ['a', ['bb', ['ccc', 'ddd'], 'ee', 'ff'], 'g', ['hh', 'ii'], 'j'] >>> x ['...
"print('This is another test')"]# 循环执行每一条代码forcodeincode_list:try:# 执行代码exec(code)exceptExceptionase:errors.append(e)# 将异常记录到错误列表中continue# 继续执行下一条代码# 打印错误列表forerrorinerrors:print(error)
假设有一个非常大的单词列表，并且想要根据给定的前缀查找单词：def prefix_search(wordlist, prefix):try:index = bisect_left(wordlist, prefix)return wordlist[index].startswith(prefix)except IndexError:return Falsewords = ['another', 'data', 'date', 'hello', 'text', 'word']print(prefix_search...
and | as | assert | break | class | continue | def | del | elif | else | except | exec | finally | for | from | global | if | import | in | is | lambda | not | or | pass | print | raise | return | try | while | with | yield ...
为什么for循环可以遍历list:Python中迭代器与生成器 阅读目录 1 引言 2 迭代器与可迭代对象 2.1 迭代器 2.2 迭代器 2.3 for循环的本质 3 生成器 3.1 迭代器与生成器 3.2 生成器解析式 4 总结 回到顶部 1 引言 只要你学了Python语言,就不会不知道for循环,也肯定用for循环来遍历一个列表(list),那为什么for...
IndexError:listindex out of range 这里的问题是except语句不接受以这种方式指定的异常列表。在Python2.x中,except Exception语句中变量e可用来把异常信息绑定到第二个可选参数上,以便进一步查看异常的情况。因此,在上述代码中,except语句并没有捕捉到IndexError异常;而是将出现的异常绑定到了参数IndexError中。
Let’s do another example that shows how to use try-except block in a function. The avg_value function returns the average value of a list of numbers. 代码语言:javascript 代码运行次数:0 运行 AI代码解释 a = [1, 2, 3] def avg_value(lst): avg = sum(lst) / len(lst) return avgpri...
>>> another_list [2,3,4,5,6] 自从python 3.1 起,我们可以用同样的语法来创建集合和字典表: >>># Set Comprehensions >>> some_list = [1,2,3,4,5,2,5,1,4,8] >>> even_set = { xforxinsome_listifx %2==0} >>> even_set ...
writelines(reversed_lines) # Step 7: 创建新的句子列表并写入文件 print("Step 7: Writing new sentences to another file.") new_sentences = [ "Here are some new lines.\n", "Python makes file manipulation easy!\n", "Let's write these lines to a file.\n" ] with open('new_sentences....