# -*- coding: utf-8 -*-

# for x in .. 循环把每个元素带入变量x

names = ['Michael','Bob','Tracy']

for name in names:

print(name)

sum = 0

for x in range(101):

sum =sum + x

print(sum)

L = ['Bart', 'Lisa','Adam']

for name in L :

print ("hello %s" %name)

# python 内置字典dict和set

d = {'Michael':95,'Bob':75,'Tracy':85}

print d.get('Bob')

# set 是一组key 的集合，不存储value 不能有重复 无序

s = set([1,1,2,2,3,3])

s.add(4)

print s

# 对于不变对象来说，调用对象自身的任意方法都不会改变自身本身，而是穿件一个新的对象

a =['c','b','a']

a.sort()

print a

stra = 'abc'

b = stra.replace('a','A')

print stra

print max(1,10,23,100)

def my_abs(x):

if x> 0:

return x

else:

return -x

print my_abs(-100)

print 'hello word',stra