面向对像(7day)

#
#
# x=3
#
在python中能开辟作用域的就是函数，类，还有模块
#
#
#
# for i in range(10):  # for循环不能开辟作用域，一定义就是全局的，还有if else也是不能
#     x=55
#
# def f():
#     x=5
#     y=4
#
#     print(x)
#
#
# class A():
#     c=3
#
#
# print(c)
#


def add(x,y):

    return x+y


import re

 http://www.cnblogs.com/yuanchenqi/articles/6766020.html

参考模块的博客

time模块参考博客

random模块

 

import random


#print(random.random())

#print(random.randint(1,4))  #[1,4]
#print(random.randrange(1,3))  #[1,3)

# print(random.choice([11,26,3,4]))
# print(random.sample([11,26,3,4],2))

#print(random.uniform(1,3))

# item=[1,23,33]
#
# random.shuffle(item)
# print(item)

# a-z  A-Z


def validate():

    s=""
    for i in range(5):
         rNum=random.randint(0,9)
         r_alph=chr(random.randint(65,90))

         ret=random.choice([str(rNum),r_alph])
         s+=ret

    return s

print(validate())

 

摘要算法

import hashlib



m=hashlib.md5()

m.update("alex".encode("utf8"))  #534b44a19bf18d20b71ecc4eb77c572f

print(m.hexdigest())


m.update("alex".encode("utf8"))  #alexalex

print(m.hexdigest())

n=hashlib.md5("salt".encode("utf8"))
n.update(b"alexalex")
print(n.hexdigest())


# m=hashlib.sha1()

 

 

os模块

import os

# print(os.getcwd())
#
# f=open("test.txt","w")
#
# os.chdir(r"C:\Users\Administrator\PycharmProjects\py_fullstack_s4\day32") # cd
#
# f=open("test2.txt","w")
#
# print(os.getcwd())


#os.makedirs("aaaaa/bbb")
#os.removedirs("aaaaa/bbb")

#print(os.listdir(r"C:\Users\Administrator\PycharmProjects\py_fullstack_s4\day33"))

# print(os.stat(r"C:\Users\Administrator\PycharmProjects\py_fullstack_s4\day33\test.txt"))
#
#
# '''
# os.stat_result(st_mode=33206, st_ino=10133099161702379, st_dev=3233102476, st_nlink=1, st_uid=0, st_gid=0, st_size=0, st_atime=1493176560, st_mtime=1493176614, st_ctime=1493176560)
#
# '''

# "yuan"+os.sep+"image"

#print(os.name)
#print(os.system("dir"))

# abs=os.path.abspath("test.txt")
# print(os.path.basename(abs))
# print(os.path.dirname(abs))

s1=r"C:\Users\Administrator\PycharmProjects"

s2=r"py_fullstack_s4\day33"

#print(s1+os.sep+s2)

ret=os.path.join(s1,s2)   # 推荐方式
print(ret)