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。