形参和实参|默认值|可选实参|tuple|*tuple|args|*args | **kwargs|args[:]|

#!/usr/bin/python

def hello(i,greet='long time to see!'):
    out =  "hello "+i+" "+greet
    nobody = {'as':'123','ad':'1234','om':'ssss'}
    if i == '2':return nobody
    return out

name = 'we'
if hello('we')==hello(name)and hello('we')==hello(i= 'we'):
    print "right!"

#right!

yoo = hello('ss','yoooo!')
print yoo

#hello ss yoooo!

for key in hello('2','yoooo!').items():
    print key
'''
('om', 'ssss')
('as', '123')
('ad', '1234')
'''
l = hello('2')
print l

l_1 = hello('2')
l_2 = hello('2')
print l_1
def printnumber(**arr):
    for i in arr.values():
        print i

def pr(arr):
    for i in arr.keys():
        print i


printnumber(a='alala',b='bababa',c= 'sksks')
pr(l_1)
'''
alala
sksks
bababa
'''


a = [1,2,3,4]
b = ['a','b','c','d']
c = [a[:],b[:]]

def cut(*a_1):
    for i in a_1:
        del i[1]
    return a_1

print cut(c[:])
print a,b
print cut(a[:],b[:])

'''
([[1, 2, 3, 4]],)
[1, 2, 3, 4] ['a', 'b', 'c', 'd']
([1, 3, 4], ['a', 'c', 'd'])
'''