本文实例讲述了python开发之for循环操作。分享给大家供大家参考,具体如下:
下面是我做的一些学习记录供大家参考:
#基本的for循环语句 test_list = [2,\"Jone\",3,6,7,\'hongten\',\'hanyuan\',\'good\',\"Tom\"] #打印列表的长度 print(len(test_list)) #遍历列表 for i in test_list: print(i) test_str = \"hello,i\'m hongten\" print(\'打印字符串:\' + test_str) #遍历一个字符串 print(\'遍历一个字符串\') for i in test_str: print(i) test_tuple = [(\"a\",1),(\"b\",2),(\"c\",3),(\"d\",4)] print(test_tuple) #遍历一个元组 print(\'遍历一个元组\') for (i,j) in test_tuple: print(i,j) test_dict = {\'name\':\'hongten\',\'age\':\'20\',\'gender\':\'M\',\'sports\':\'足球,乒乓球,游泳\'} #字典迭代器 for key in test_dict: print(key + \':\' + test_dict[key]) L1 = [1,3,5,7] L2 = [2,4,6,8] #使用zip将两个列表合并 print(zip(L1,L2)) for (i,j) in zip(L1,L2): print(i,j) print(\'#######################################################\') L3 = L2[:] L3.remove(8) print(\'L1,L3列表为:\') print(L1) print(L3) for (i,j) in zip(L1,L3): print(i,j) #可以看出来当长度不一的时候,多余的被忽略 test_keys = [\'name\',\'age\',\'gender\',\'weight\',\'hight\'] test_values = [\'Hongten\',\'20\',\'M\',\'55\',\'170\'] #使用zip来构造一个字典 print(\'字典中的keys:\') print(test_keys) print(\'字典中的key对应的value:\') print(test_values) print(\'构造字典后\') test_dic = dict(zip(test_keys,test_values)) for key in test_dic: print( key + \':\' + test_dic[key])
运行效果:
Python 2.7.9 (default, Dec 10 2014, 12:24:55) [MSC v.1500 32 bit (Intel)] on win32 Type \"copyright\", \"credits\" or \"license()\" for more information. >>> ================================ RESTART ================================ >>> 9 2 Jone 3 6 7 hongten hanyuan good Tom 打印字符串:hello,i\'m hongten 遍历一个字符串 h e l l o , i \' m h o n g t e n [(\'a\', 1), (\'b\', 2), (\'c\', 3), (\'d\', 4)] 遍历一个元组 (\'a\', 1) (\'b\', 2) (\'c\', 3) (\'d\', 4) gender:M age:20 name:hongten sports:足球,乒乓球,游泳 [(1, 2), (3, 4), (5, 6), (7, 8)] (1, 2) (3, 4) (5, 6) (7, 8) ####################################################### L1,L3列表为: [1, 3, 5, 7] [2, 4, 6] (1, 2) (3, 4) (5, 6) 字典中的keys: [\'name\', \'age\', \'gender\', \'weight\', \'hight\'] 字典中的key对应的value: [\'Hongten\', \'20\', \'M\', \'55\', \'170\'] 构造字典后 gender:M age:20 name:Hongten weight:55 hight:170 >>>
希望本文所述对大家Python程序设计有所帮助。