print(eachaaa_item) else: print(eachaa_item) else: print(eacha_item) else: print(each_item) #当你打完这些你一定会mmp的,容易打错就不说了,大量重复代码! def print_99(list1): #list会与全局变量冲突 for each_item in list1: if isinstance(each_item,list): print_99(each_item) #each_it...
海清['张','黄','杜','蒋']>>> 4. 解开三层嵌套 代码语言:javascript 代码运行次数:0 运行 AI代码解释 >>>movies=["红海行动",2018,"林超贤",138,["张译","海清",["张","黄","杜","蒋"]]>>>foreach_iteminmovies:ifisinstance(each_item,list):fornested_itemineach_item:ifisinstance(nested...
>>> for item in mylist[:]: ... if item % 2: ... mylist.insert(0, 100) ... >>> print mylist [100, 100, 100, 100, 100, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9] 本例中的第一个 for 循环只要在原始 list 中发现奇数,它就在 list 的开始插入数值 100。当然,这是一种演示此...
for item in sequence: expressions 1. 2. sequence 为可迭代的对象,item 为序列中的每个对象。 example = [11,22,33,44,55,99,88,77,66] for i in example: print(i) #输出 11 22 33 44 55 99 88 77 66 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 输出的结果为 11,22,33...
1.基本for循环 在Python中for循环的基本格式如下所示: for item in [列表、元组、字典、集合、字符等]: doSomething 1. 示例代码如下所示: a={1,2,3,4,5} for item in a: print(f"current item is {item}") 1. 2. 3. 输出结果如下所示: ...
使用item()就有点类似于php里的foreach类似。都能把键=>值的方式遍历出来,如果纯使用for..in则只能取得每一对元素的key值 代码如下: person={'name':'lizhong','age':'26','city':'BeiJing','blog':'www.jb51.net'} for x in person: print x ...
>>>foreach_iteminmovies:print(each_item) The Holy Grail1975Terry Jones&Terry Gilliam91['Graham Chapman', ['Michael Palin','John Cleese','Terry Gilliam','Eric Idle','Terry Jones']] 哦!没有处理干净... 再循环! >>>foreach_iteminmovies:ifisinstance(each_item,list):fornested_itemineach_i...
#!/usr/bin/env python #_*_coding:utf-8_*_ list3=["openatck","docker","linux","and","list","dict","set",[["openatck646646","docker47575"], for each_item in list3: if isinstance(each_item, list): for seach_item in each_item: print(seach_item) else: print(each_item) 结...
"expression_list". The suite is then executed once for each item provided by the iterator, in...
my_list= [1,2,3,'apple','banana','orange'] 接下来,我们利用for循环来遍历并输出列表的每一个元素。for循环是Python中用来循环遍历可迭代对象(包括列表)的一种控制流结构。 foriteminmy_list:print(item) 以上代码在每次迭代中将列表中的元素赋值给变量item,然后通过print()函数输出该变量的值。运行上述代...