Python_ Decorator, Generator _ Dry Goods OH

Import time
Import Calendar
Import OS

# Time Format Familiar
"""
# Formatted as 2016-03-20 11:45:39 form
TIME01 = Time.strftime ("%y-%m-%d%h:%m:%s", Time.localtime ())
Print ()
# formatted as Sat 28 22:24:24 2016 form
Print (Time.strftime ("%a%b%d%h:%m:%s%Y", Time.localtime ()))
# Convert a format string to a timestamp
A = "Sat Mar 28 22:24:24 2016"
Print (Time.mktime (Time.strptime (A, "%a%b%d%h:%m:%s%Y")))

Print (Calendar.month (2017, 2))
Print (Calendar.calendar (2017, 1, 1, 3))

Print ("* * * *", Calendar.leapdays (2001, 2017))

#返回月份开始的前一天是周几及月份有几天
Print ("* * * *", Calendar.monthrange (2017, 7))
"""
# list Operations
"""
def change_mylist (tmplist):
Tmplist.append ([9, 9, 9])

Print (tmplist)

MyList = [1, 3, 4, 6]

Change_mylist (MyList)

Print (MyList)
"""
# String to Dictionary
"""
A = ' {' "name": "Lucy", "Age": Ten, "tmp": "Adssa"} '
Tmpdic = eval (a) #字符串转字典
For I, J in Tmpdic.items ():
Print ("39-%s-%s". Center (+, "*")% (I, J))

For I in Tmpdic:
Print ("42-{value}". Format (value = Tmpdic[i]). Center (20, "*"))
"""

"' Adorner
Principle: 1, can not modify the decorated source code 2, cannot modify the call mode of the decorated function
‘‘‘
# The parameter is not fixed
‘‘‘
def Tmp_timmer (func):
def tmp_warpper (*args, **kwargs):
Start_time = Time.time () # before function call
Print ("999". Center (20, "-"))
ret = func (*args, **kwargs) # function call
Stop_time = Time.time () # After a function call
Print ("* * * * * * * * * dif_time}". Format (Dif_time = (stop_time-start_time)))
return ret
Return Tmp_warpper

@tmp_timmer

Def time_test ():
Time.sleep (. 5)
Print ("Test---01")

Time_test ()
‘‘‘
# Functions with parameters to decorate
‘‘‘
def Tmp_zhuangshiqi (func):
def tmp_func (x, y):
Print ("Test---02")
RET = func (x, y)
Print ("666". Center (+, "*"), ret)
Return (RET-5)
Return Tmp_func

@tmp_zhuangshiqi
def time_test (x, y):
Print ("Test---01")
Time.sleep (2.3)
return (x + y)

Print ("3, 3"), Center (time_test, "-")
‘‘‘
# higher-order functions--function as variables
"' return value contains function name; pass one function as a parameter to another function '"
‘‘‘
def tmpfunc (x, y):
Print ("*******92*")
return x + y

def count_sum (x, func):
Print ("----96--", func)
return x * func

Print (Count_sum (4, Tmpfunc (1, 1)))
‘‘‘
# Adorner calls Beginner
‘‘‘
def wrapper_01 (func):
def test_func (*args, **kwargs):
Print ("* * *, before function call")
ret = func (*args, **kwargs)
Print ("* * * *, after function call * * * *", ret)
If RET is not None:
Return ret-3
Else
return ret

Return Test_func #返回 Test_func memory address

@wrapper_01 # using Adorners
Def test_print ():
Print ("* * * * * 116 * * * * *)
Time.sleep (2.5)
return 0

Print (Test_print ())

@wrapper_01
def test_print02 (x, y):
Print ("* * * * * 124 * * * * *)
Time.sleep (2.5)
return x + y

Print (test_print02 (3, 5))
‘‘‘
# Decorator Classic Case _ decorator pass parameter, function pass ...
"""
Username, password = "Allen", "123"

def auth (Checktype):
Print ("{Tmpcheck}". Format (Tmpcheck = checktype). Center (50, "-"))
def outer_wrapper (func):
def wrapper (*args, **kwargs):
NAME01 = input ("Input username:")
PASSWORD01 = input ("Input password:")
Print ("{check}". Format (check=checktype). Center (100, "*"))

if Checktype = = "A":
If name01 = = Username and password01 = = password:
ret = func (*args, **kwargs)
Print ("\033[31;1msuccess login!!!! \033[0m ")
return RET * 3
Else
Exit ("\033[33;1musername or password is wrong!\033[0m")
return 0
Else
If name01 = = Username and password01 = = password:
ret = func (*args, **kwargs)
Print ("\033[35;1msuccess login!!!! ---B \033[0m ")
return ret
Else
Exit ("\033[36;1musername or password is wrong! ----B \033[0m ")
return 0

Return wrapper

Return Outer_wrapper

@auth (Checktype = "A")
def home_page (x, y):
Print ("Login Page * * * * * *")
return x + y

@auth (Checktype = "B")
Def personal_page ():
Print ("View personal Information")
 

# function call
Print ("^^ ^^ ^^ ^^ ^^ ^", Home_Page (2, 3))
Personal_page ()
"""
# List Builder: two ways to build
"""
# Way One
#例一
Tmplist = [I * 2 for I in range (10)]
Print ("* * * * * * * * * 185", tmplist)

#例二
def del_int (x):
return x% 2

Print ("****** 196 * * * * * * * * * * *", [Del_int (i) for I in range (10)])

#方式二
A = []
For I in range (10):
A.append (2*i)

Print ("* * * * * * * * * * 191", a)
"""
# Fibonacci Numbers: 1, 1, 2, 3, 5, 8, 13, 21, 34 ....
"""
# The value of the nth Fibonacci number
def fib (n):
If n < 2:
Return 1
Else
return fib (n-1) + fib (n-2)
# First n Fibonacci values and
def SUM_FIB (n):
sum_tmp = 0
For I in range (n):
Sum_tmp + = fib (i)
Return sum_tmp

input_int = Int (input ("input" number of Fibonacci Numbers: "))
Print (FIB (input_int))
Print (SUM_FIB (input_int))
"""
# generator Detailed: Yield keyword
"""
def fib (Tmp_max):
N, a, b = 0, 0, 1
While N < tmp_max:
Print ("**225**", b)
Yield B # Put the value of B in the fib.
A, B = B, A + b
n = n + 1
Return "program End" # exception message

f = fib (10)

# for I in F: # Loop output Generator generated content
# print ("231***", i)
# "After executing to this position, the change position is recorded, so the following loop does not execute"

While True:
Try
A = next (f)
Print ("* * * * * * 234", a)
Except Stopiteration as E:
Print ("Throw exception". Center ("*"), E.value)
Break
"""
# Generator: Parallel effect on single thread
"""
# yield is returned after saving the current state,
DEF consumer (name):
Print ("%s ready to eat buns!") "% (name))
While True:
Baozi = yield
Print ("Bun [%s] came, was [%s] ate!" "% (Baozi, name))

# Production of steamed buns
Def producer ():
C1 = Consumer ("A")
C2 = Consumer ("B")

C1.__next__ ()
C2.__next__ ()

Print ("Start making buns ....") ")
For I in range (10):
Time.sleep (1.0)
Print ("Make 2 buns!" ")
C1.send (i)
C2.send (i)
#调用函数
Producer ()
"""

Python_ Decorator, Generator _ Dry Goods OH