python 学习笔记 #

print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)
# objects -- 复数，表示可以一次输出多个对象。输出多个对象时，需要用 , 分隔
# sep -- 用来间隔多个对象，默认值是一个空格
# end -- 用来设定以什么结尾。默认值是换行符 \n，我们可以换成其他字符串
# file -- 要写入的文件对象
# flush -- 输出是否被缓存通常决定于 file，但如果 flush 关键字参数为 True，流会被强制刷新
# 返回值 无

print('hello world')

print('漫','步','人','生')

print(12) 

print(12 + 20)

print("美丽","人生",sep="-")
# 美丽-人生

str = '''
ab
cd
'''

print("请输入你的名字!")
myName =input() 
print("你的名字是",myName,"!",sep="",end="")

#请输入你的名字!
#张三
#你的名字是张三!

name = 'value'
# name 表示变量名；value 表示值，也就是要存储的数据

pi = 3.14
name = "blake" 
n = 20
n = 'dsdh'

print(type('string'))
print(type(3.1415))
print(type(100))
print(type(''))

# <class 'str'>
# <class 'float'>
# <class 'int'>
# <class 'str'>

# 数值
digital_value = 0

# 字符串
str_value = "" 

# 列表
list_value = []

# 字典
ditc_value = {}

# 元组
tuple_value = ()

# Python中关于空类型的判断使用的内建函数any(),

# 列表 也是数组 奇怪吧
list_value = [2,3,5]

print('length',len(list_value))


# 字典
ditc_value = {'a':'2'}

print("ditc_value",ditc_value)


# 元组 相当于常量
tuple_value = (2,'b')

print('tuple_value',tuple_value)

import random

# 简单运算符
a = 10 - 1
b = 11 * (2 + 5)
c = random.random() / 20
d = 20 % 4
# 这里是12的2次方
e = 12 ** 2
# 这里是9除以2 向下取整
f = 9 // 2

y1 = random.random() >= random.random()
y2 = random.random() == random.random()
y3 = random.random() <= random.random()

y4 = 2
y4 -= 1

y5 = 2
y5 += 1


print('a', '=', a)
print('b', '=', b)
print('c', '=', c)
print('d', '=', d)
print('e', '=', e)
print('f', '=', f)


print('y1', '=', y1)
print('y2', '=', y2)
print('y3', '=', y3)
print('y4', '=', y4)
print('y5', '=', y5)

import random
# python 压根就不支持 switch
# python三元运算符  也是没有的
a1 = random.random()
a2 = random.random()

if (a1 >= a2):
    print("a1大于a2", a1, " ", a2)
    print("结束")

b1 = 12 + random.random()
b2 = 12 + random.random()

if (b1 == b2):
    print("b1==b2")
    print("比较结束")
elif (b1 < b2):
    print("b1<b2")
    print("比较结束")
else:
    print("不符合")
    print("比较结束")

import random

for x in range(2, 10):
    print("x:", x)
    print(" ")

maxValue = 50

while (maxValue > 0):
    maxValue -= random.random()
    print("maxValue:", maxValue)
    print(" ")

minValue = 0

while (minValue < 100):
    minValue += random.random() * 10
    print("minValue:", minValue)
    print(" ")



for x in range(2,20):
    if(x % 2 == 0):
        print("偶数:",x)
    elif(x % 3 == 0):
        print("能被3整除:", x)
    else:
        print("临时变量:", x)



#

str1 = "人生五十年,如梦亦如幻。有生斯有死,壮士复何憾"

for x in str1:
    print("x:",x)
    if(x == ","):
        break




str2 = "Hubei couple opt for romantic, not lavish, wedding"

for y in str2:
    if(y == ' '):
        continue
    else:
        print(y)


#

import random

index = 0
for i in range(2, int(random.random() * 100), 3):
    if (i % 2 >= 3):
        pass
    print(i)


pass

str1 = 'The Most Beautiful Swiss Books China Tour will be on exhibit in Shanghai from February 10 to 13 at Shanghai Ming Contemporary Art Museum'


print(str1)
print(str1[0])
print(str1[1])
print(max(str1))
print(min(str1))
print(str1.upper())

import random

# 自己定义一个字符串函数
def randomString():
    arr = []
    str_value = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ!"#$%&'()*+,-./:;?@[\]^_`{|}~"
    len_value = len(str_value)
    for x in range(1,10):
        index = int(random.uniform(0,len_value))
        arr.append(str_value[index])
    return "-".join(arr)


arr1 = [int(random.random() * 10), int(random.random() * 10), int(random.random() * 10), int(random.random() * 10)]
print(arr1)

print(arr1[0])

print(arr1[1])

print("len",len(arr1))

arr1.reverse()
print(arr1)

arr1.sort()

print(arr1)

arr2 = []
arr3 = []

print(randomString())

for x in range(1,5):
    arr2.append(randomString())
    arr3.append(randomString())
    pass



print(arr2)
# 删除第一个元素
del arr2[0]
print(arr2)


arr2.insert(0,'a')
print(arr2)
arr2.pop(1)
print(arr2)
arr2.remove("a")
print(arr2)

# 打印一下
def printNew(temp):
    print(temp)
    pass


# 加法
def add(a, b):
    return a + b


# 减法
def sub(x, y):
    return x - y


# 除法
def div(x, y):
    return x / y


# 取模
def takingMold(m, n):
    return m % n


# 次方
def runPower(m, n):
    return m ** n


a = runPower(2, 3)

print(a)

tup1 = (1,3)
tup2 = ('abc', 'xyz')

print(tup1[0])
print(tup1[1])

# 以下修改元组元素操作是非法的
# tup1[0] = 100

# 元组 不能修改但是可以组合


# 但我们可以对元组进行连接组合

# 创建一个新的元组
tup3 = tup1 + tup2

print(tup3)

d = {key1 : value1, key2 : value2 }

arr0 = range(10)

for kk in arr0:
    print(kk)

print("--------------------------")

arr1 = range(2, 7)

for i in arr1:
    print(i)

print("..............................")

arr2 = range(20, 100, 10)
for k in arr2:
    print(k)

import random


# 随机整数
def randomInt():
    temp = int(random.random() * 1000)
    temp += int(random.uniform(0, 100))
    return temp


# 随机浮点数
def randomFloat():
    temp = 0
    temp += random.random() * 10
    temp *= random.random()
    return temp


# 获取单独一个asii 字符
def getOneChar():
    # 小写字母a-z：97-122
    arr1 = range(97, 122)
    # 大写字母A-Z：65-90
    arr2 = range(65, 90)
    # 数字0-9：48-57
    arr3 = range(48, 57)
    arr0 = []
    arr0.extend(arr1)
    arr0.extend(arr2)
    arr0.extend(arr3)
    index = int(random.uniform(0, len(arr0)))
    tempNumber = arr0[index]
    return chr(tempNumber)


# 获取随机字符串
def randomString(tempLen):
    temp = ""
    for x in range(1, tempLen):
        temp += getOneChar()
    return temp

import mathModule
# 只有同级目录才能这样

print(mathModule.randomInt())
print(mathModule.randomFloat())
print(mathModule.getOneChar())
print(mathModule.randomString(92))

import sys


sys.path.append("D:\\pythonProjects\\t2\\gg")

import newmodule

print(sys)
newmodule.newPrint('sdhsdhsh')

import sys
import  os

#父路径
str1 = os.path.abspath(os.path.join(os.getcwd(), os.pardir))
#再次取父路径
str1 = os.path.abspath(os.path.join(str1, os.pardir))
sys.path.append(str1+"\\gg")

import newmodule


newmodule.newPrint('kkkk')

def fileF4(dir):
    f1 = open(dir, "r+", encoding="UTF-8")
    print("文件名: ", f1.name)
    print("是否已关闭: ", f1.closed)
    print("访问模式: ", f1.mode)
fileF4("D:\\pythonProjects\\t2\\readme.md")

import os
import random
import time

dir1 = "D:\\pythonProjects\\t2\\打包编辑器安装.md"


def fileF1(dir):
    f1 = open(dir, "r", encoding="UTF-8")

    # 读取
    # file 表示已打开的文件对象；size 作为一个可选参数，用于指定一次最多可读取的字符（字节）个数，如果省略，则默认一次性读取所有内容
    # print(f1.read())
    print(f1.read(20))

    # 关闭文件
    f1.close()


def fileF2(dir):
    f1 = open(dir, "r+", encoding="UTF-8")
    # file 为打开的文件对象；size 为可选参数，用于指定读取每一行时，一次最多读取的字符（字节）数
    print(f1.readline())
    print(f1.readline(1))
    print(f1.readline(2))
    print(f1.readline(5))

    # 关闭文件
    f1.close()


def fileF3(dir):
    f1 = open(dir, "r+", encoding="UTF-8")
    # readlines() 函数用于读取文件中的所有行，它和调用不指定 size 参数的 read() 函数类似，只不过该函数返回是一个字符串列表，其中每个元素为文件中的一行内容。
    lines = f1.readlines()
    for str in lines:
        print(str)
    f1.close()


def fileF4(dir):
    f1 = open(dir, "r+", encoding="UTF-8")
    print("文件名: ", f1.name)
    print("是否已关闭: ", f1.closed)
    print("访问模式: ", f1.mode)


def fileF5():
    # write()方法可将任何字符串写入一个打开的文件。需要重点注意的是，Python字符串可以是二进制数据，而不是仅仅是文字。
    # write()方法不会在字符串的结尾添加换行符('\n')：
    # 语法 fileObject.write(string)

    num1 = int(time.time())
    num2 = int(random.random() * 100 * random.random()) * int(random.random() * 100) + int(random.random() * 100 * random.random())
    str2 = os.path.abspath(os.path.join(os.getcwd(), os.pardir)) + "\\file" + "\\" + str(num1) + ".txt"
    fo = open(str2, "w")
    fo.write(str(num2 + time.time()))
    fo.flush()
    fo.close()

def fileF6():
    strList = []
    for x in range(0,100):
        strList.append(str(time.time() * time.time()) + '\n' )
    str2 = os.path.abspath(os.path.join(os.getcwd(), os.pardir)) + "\\file" + "\\" + str(float(time.time())) + "_writelines.txt"
    fo = open(str2, "w")
    # 写入函数只有 write() 和 writelines() 函数，而没有名为 writeline 的函数
    fo.writelines(strList)

    fo.flush()
    fo.close()

# fileF1(dir1)

# fileF2(dir1)

# fileF3(dir1)

# fileF4(dir1)

# fileF5()

fileF6()

import  os

import  time

# 返回当前工作目录
print(os.getcwd())

# 返回 path 的绝对路径
print(os.path.abspath(os.getcwd()))

dir1x = os.getcwd() + "\\"+str(int(time.time()))

# 创建目录
os.mkdir(dir1x)
print(dir1x)

# os.chdir(dir1x)
# print("新目录",os.getcwd())


# 获取 path 路径的基本名称，即 path 末尾到最后一个斜杠的位置之间的字符串 如 readme.md
print(os.path.basename("D:\\pythonProjects\\t2\\readme.md"))

# 判断路径是否为文件
print(os.path.isfile("D:\\pythonProjects\\t2\\readme.md"))

# 判断路径是否为目录
print(os.path.isdir("D:\\pythonProjects\\t2"))

import os

import time

import random

str2 = os.path.abspath(os.path.join(os.getcwd(), os.pardir)) + "\\file" + "\\" + "_writelines.txt"
strDir = os.path.abspath(os.path.join(os.getcwd(), os.pardir)) + "\\file" + "\\" + str(random.random())
str21 = os.path.abspath(os.path.join(os.getcwd(), os.pardir)) + "\\file" + "\\" + "_zzx.txt"
str3 = os.path.dirname(str2) + "\\_v0000.text"

os1 = open(str2, "w")
os2 = open(str21, "w")

strList = []
for x in range(0, 100):
    strList.append(str(time.time() * time.time()) + '\n')

os1.writelines(strList)
os1.flush()
os1.close()

os2.write(os.getcwd())
os2.flush()
os2.close()



print(str3)
print(str2)
# 重命名
os.rename(str2, str3)


print(str21)

# 删除文件
os.remove(str21)

os.mkdir(strDir)
print(strDir)

# 删除文件夹
os.rmdir(strDir)

import random


class Employee:
    # 所有员工的基类 empCount 变量是一个类变量，它的值将在这个类的所有实例之间共享
    empCount = 0

    # 类的构造函数或初始化方法，当创建了这个类的实例时就会调用该方法
    def __init__(self, name, salary):
        self.name = name
        self.salary = salary
        Employee.empCount += 1

    def displayCount(self):
        print("Total Employee", Employee.empCount, sep="  _")

    def displayEmployee(self):
        print("name:", self.name, " ;", "salary:", self.salary)

# 定义实例 1
t1 = Employee("张三", random.random() * random.random() * 10000)
t1.displayCount()
t1.displayEmployee()

# 定义实例 2
t2 = Employee("李四", random.random() * random.random() * 10000)
t2.displayCount()
t2.displayEmployee()

import random

class Person:
    hand = ""
    footer = ""
    head = ""


# 这里是继承 Person
class Teacher(Person) :
    # 静态类变量
    empCount = 0

    def __init__(self,name,position):
        self.name = name
        self.position = position


    def print(self):
        print("名字:",self.name,"  职位:",self.position)
        print("__dict__ ",Teacher.__dict__ ,sep=":")
        print("__doc__",Teacher.__doc__,sep=":")
        print("__name__",Teacher.__name__,sep=":")
        print("__module__",Teacher.__module__,sep=":")
        print("__bases__ ",Teacher.__bases__ ,sep=":")


t1 = Teacher('张老师','数学')
t1.print()


t2 = Teacher('李老师','英语')
t2.print()