Python基础数据结构之大循环（for list,set,dict,tuple）

本章是Python基础数据结构的第六篇，由于之前没有接触过太多的Python版本的数据结构，所以在学习的过程中集百家之长和自己的见解，加以实践，学习Python。
Python中用到tuple的方法，和注意事项都以代码的形式体现

#!/usr/bin/env python# -*- coding: utf-8 -*-# @Time    : 2017-5-3 10:41# @Author  : coderManFans# @Site    : Python基础数据之大循环#            本篇是基础数据的for循环操作，同时学习如何使用复杂的基础数据#            通过组合不同数据结构可以满足不同数据模型的构建需求# @File    : dataforearchDemo.py# @Software: PyCharm#1.  for 循环 list#1.1 循环单个元素的listlist1 = [1,2,3,'2','2',"323",33.22]for i in list1:    print("i = "+str(i))#1.2 循环多个元素的list 比如二维数组list2 = [['u',1],['x',2],['w',3]]for u,v in list2:    print("u = " + str(u) + ",v = " + str(v))print("-----------------------------------------------------------")#1.3 list里嵌套tuple的循环list3 = [("a","sd",2323),("sd","sd23","sdf"),("sd",23,2323,2324)]for i in list3:    print(str(i[0])+"----"+str(i[1]))#1.4 list里嵌套dict的循环 每个dict的元素数量必须一样list4 = [{"a":1,"b":2},{"a":1,"b":2},{"a":1,"b":2},{"a":1,"b":2},{"a":1,"b":2}]#循环keyfor k,v in list4:    print(k+"---"+v)for di in list4:    for i in di.items():        print(i)print("--------------------------------------")#2. 循环setset1 = set([2,3,34,332,23,2,3,3,3,3,4,3,4])for s in set1:    print(s)print("------------------------------")#3. 循环tupletup1 = ('physics','chemistry','yyyy-dd-dd',999,0.0023)for t in tup1:    print(t)#3.1 tuple里内嵌listtup2 = ([1,2],[2,3],[4,5],[5,6])for t in tup2:    print(str(t[0])+"----"+str(t[1]))#3.2 tuple里内嵌dicttup3 = ({"a":"d"},{"a":'2'},{"a":"sd"},{"a":"1213"})for t in tup3:    print(t['a'])    print(t.keys())    print(t.values())    print(t.items())print("-------------------------------------------------------")#4. dict遍历dict1 = {"a":'a',"b":'b',"c":'c'}for key,value in dict1.items():    print(str(key)+"---"+str(value))