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list
list1 = [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key
for k,v in list4:
print(k+"---"+v)

for di in list4:
for i in di.items():
print(i)

print("--------------------------------------")
#2. 循环set
set1 = set([2,3,34,332,23,2,3,3,3,3,4,3,4])
for s in set1:
print(s)

print("------------------------------")
#3. 循环tuple
tup1 = ('physics','chemistry','yyyy-dd-dd',999,0.0023)
for t in tup1:
print(t)

#3.1 tuple里内嵌list
tup2 = ([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dict
tup3 = ({"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))