https://gitee.com/fakerlove/python

https://www.python.org/

https://www.python.org/downloads/release/

python --version

https://www.anaconda.com

https://www.anaconda.com/products/individual-b#Downloads

https://www.jetbrains.com/pycharm/

print("hello--word")

a=123
print(a)

a=123
b=456
print(a,b)

print("输出字符串模板".format(变量1,变量2))

a=123
b=456
print("a的值为{}，b的值为{}".format(a,b))

a=input("请输入一行字符串")
print(a)

a=eval("1.2+3.4")
print(a)

a=eval(input("请输入数字"))
print(a*2)

a=99
a=a+1
print(a)

我的名字=99
我的名字=我的名字+1
print(我的名字)
a_b=99
a1_c=a_b+我的名字
print(a1_c)

print(0b11)

print(0xb1)

print(1.23234e-2)

a=pow(2,3)
print(a)

8

a=pow(0.2,3)
print(a)

a=12+4j
print(a.real)
print(a.imag)

print("人生几何，对酒当哥？"[1:4])
print("人生几何，对酒当哥？"[-4:-1])

print("""sda
sada
sdad
asdada""")

sda
sada
sdad
asdada

print("dsa\
sada\
asdadsa")

dsasadaasdadsa

print("\"青青子衿，悠悠我心\"")

print("kkk\\n 悠悠我心")

print("123456"[::-1])
print("123456"[::2])

print("{}说:你是大{}".format("我","笨蛋"))
print("{1}说:你是大{0}".format("我","笨蛋"))
print("{0:%<25}啦啦啦".format("笨蛋"))
print("{0:%^25}啦啦啦".format("笨蛋"))
print("{0:%^15}啦啦啦".format("笨蛋"))
print("{0:,}你好呀".format(12314))
print("{0:.2f}".format(12334.4524234))
print("{0:.2}".format(12334.4524234))
print("{0:.2}".format("sad群无sad"))
print("{0:b},{0:d},{0:o},{0:x},{0:X},{0:c}".format(123))

name="我是大笨蛋"*3
print(name)
a ="是"
print(a in name)

s=["sda",1231]
print(s)
print(type(s))

a=[121,23,[231,"3312"],"231"]
for item in a:
    print(item*2)

ls=["风清扬","令狐聪","东方不败"]
ls.append("欧阳锋")
print(ls)

ls=["风清扬","令狐聪","东方不败"]
ls.append("欧阳锋")
print(ls)
ls.insert(1,"郭靖")
print(ls)

ls=["风清扬","令狐聪","东方不败"]
print(ls)
ls.reverse()
print(ls)

ls=('风清扬', '令狐聪', '东方不败')
print(ls,type(ls))

ls=('风清扬', '令狐聪', '东方不败')
print(ls,type(ls))
# 东方不败在元组李有多少个
print(ls.count("东方不败"))
# 第一次出现东方不败的索引值
print(ls.index("东方不败"))
print(ls[1])

ls={"a":"火影","b":"sada"}
ls[20]='dsa'
print(ls,type(ls))
print(ls.items())
print(ls.get("a"))

ls={"a":"火影","b":"sada"}
for item in ls:
    print("键为{}，值为{}".format(item,ls.get(item)))

s={100,"1231",79.9,79.9}
print(s)
print(type(s))

s={100,"1231",79.9,79.9}
t={100,"7777","1231",1234}
print(s-t)
print(s&t)
print(s^t)
print(s|t)

print(1024*32)
print("对酒当歌，人生几个"+"譬如朝鹿，去日苦劝")

a,b=3,4
a,b=b,a
print(a,b)

print(not False)
print((1>0 ) and (5<6))
print((1>0 ) or (5>6))

s=3
if s%2==1:
    print("是奇数")

是奇数

s=4
if s%2==1:
    print("是奇数")

else:
    print("是偶数")

s=90
if s<60:
    print("不及格")

elif s<80 and s>=60:
    print("良好")
else :
    print("优秀")

for item in "Python":
    print(item)

for item in range(3,20,2):
    print(item)

for item in range(3,20,2):
    print(item)
    if(item==11):
        break;

for item in range(1,10,1):
    if(item==6):
        continue;
    print(item)

n=0
while n<10:
    n+=1
    print(n)

n=0
while n<10:
    n+=1
    print(n)
else:
    print("循环正常结束")

n=0
while n<10:
    n+=1
    if n==5:
        break
    print(n)
else:
    print("循环正常结束")

try:
    a=1/0
except:
    print("对不起执行了异常处理")

def loop(n):
    for item in range(n):
        print(item)
    print("循环结束")
    return n
a=loop(2)
print("返回结果为{}".format(a))
a=loop(3)
print("返回结果为{}".format(a))
a=loop(1)
print("返回结果为{}".format(a))

def heart(a):
    allChar=[]
    for y in range(12, -12, -1):
        # 每行字母集合
        lst = []
        temp = ''
        for x in range(-30,30,1):
            # 心型线公式
            formula = ((x*0.05)**2+(y*0.1)**2-1)**3-(x*0.05)**2*(y*0.1)**3
            # 在心型线内，填充字母
            if formula<=0:
                 temp += a[(x) % len(a)]
            else:
                # 心型线外填充空格
                 temp += ' '
            #  把每个元素追加进去
        lst.append(temp)  
        # 添加每行字母与、
        allChar += lst
    print('\n'.join(allChar))
    
heart("Python")

try:
    f = open(r"C:\Users\20346\Desktop\1.txt", "r", encoding="UTF-8")
    content = f.read()
    print(content)
except BaseException as e:
    print(e)
finally:
    f.close()

大家都不的目的地

try:
    f = open(r"C:\Users\20346\Desktop\1.txt", "rb")
    content = f.read()
    print(content)
except BaseException as e:
    print(e)
finally:
    f.close()

b'\xe5\xa4\xa7\xe5\xae\xb6\xe9\x83\xbd\xe4\xb8\x8d\xe7\x9a\x84\xe7\x9b\xae\xe7\x9a\x84\xe5\x9c\xb0  '

OSError: [Errno 22] Invalid argument: '\u202aC:\\Users\\yyqhk\\Desktop\\1.csv'

+++++1.txt+++++
第一行的内容
第二行的内容
第三行的内容
第四行的内容
第五行的内容
第六行的内容
第七行的内容
+++++1.txt++++++

try:
    f = open(r"C:\Users\20346\Desktop\1.txt", "r+", encoding="UTF-8")
    content = f.read()
    f.seek(0)  # 光标移动到开头
    content1 = f.read(3)
    f.seek(0)  # 光标移动到开头
    content2 = f.readline()
    f.seek(0)  # 光标移动到开头
    content3 = f.readlines()

    print("一次读取全部\n"+content+"\n")
    print("一次读取三个字符，根据read(n) ,其中的n \n " + content1+"\n")
    print("一次读取一行 \n" + content2+"\n")
    print("全部读取，但是放入一个列表里\n" )
    for i in content3:
        print(i)

except BaseException as e:
    print(e)
finally:
    f.close()

一次读取全部
+++++1.txt+++++
第一行的内容
第二行的内容
第三行的内容
第四行的内容
第五行的内容
第六行的内容
第七行的内容
+++++1.txt++++++

一次读取三个字符，根据read(n) ,其中的n 
 +++

一次读取一行 
+++++1.txt+++++


全部读取，但是放入一个列表里

+++++1.txt+++++

第一行的内容

第二行的内容

第三行的内容

第四行的内容

第五行的内容

第六行的内容

第七行的内容

+++++1.txt++++++

try:
    f = open(r"C:\Users\20346\Desktop\1.txt", "w", encoding="UTF-8")
    f.write("金毛狮王")
    f.flush()  # 刷新. 养成好习惯

except BaseException as e:
    print(e)
finally:
    f.close()

try:
    f = open(r"C:\Users\20346\Desktop\1.txt", "r+", encoding="UTF-8")
    content = f.read()
    print(content)
    f.write("麻花藤的最爱")
    f.flush()
    f.seek(0)
    content = f.read()
    print(content)

except BaseException as e:
    print(e)
finally:
    f.close()

f = open(r"C:\Users\20346\Desktop\1.txt", "w+", encoding="UTF-8")
f.write("哈哈")
content = f.read()
print(content)
f.flush()
f.close()

try:
    f = open(r"C:\Users\20346\Desktop\1.txt", "a+", encoding="UTF-8")
    f.write("马化腾")
    content = f.read()
    print("指针在尾部，所以答应出来的东西为空"+content+"\n")
    f.flush()
    f.seek(0)
    content = f.read()
    print("指针在第一位，所以有东西打印 "+content)

except BaseException as e:
    print(e)
finally:
    f.close()

指针在尾部，所以答应出来的东西为空
指针在第一位，所以有东西打印 金毛狮王1麻花藤的最爱马化腾马化腾

s = ["大家好\n", "我是joker\n", "我今年18岁\n"]
with open(r"C:\Users\20346\Desktop\1.txt", "r+", encoding="UTF-8") as f:
    f.writelines(s)

class 类的名称:
  类的说明文档
  def _init_(self,...):
    pass
  ...

class Car():
    def __init__(self,year,month,day):
        self.year=year
        self.month=month
        self.day=day
    def kk(self,n):
        print("{}----{}".format(self.year,n))
        
myCar=Car(2012,21,33)
myCar.kk("312")
print(myCar.month)

class 父类名():
  def __init__(self,参数):
    ....
    
class 子类名(父类名):
  def __init__(self，参数):
    super().init(...)
    

class Car():
    def __init__(self,year,month,day):
        self.year=year
        self.month=month
        self.day=day
    def kk(self,n):
        print("{}----{}".format(self.year,n))
        
# 新能源汽车，继承关系，继承了Car ,然后能够使用父类的方法
class ElecCar(Car):
    def __init__(self,year,month,day):
        super().__init__(year,month,day)
    

        
myCar=ElecCar(2012,21,33)
myCar.month=33
myCar.kk("312")
print(myCar.month)

import cv2

import time
import random
import turtle

# 时间模块
loctime = time.localtime()
ti = time.time()
print(ti)
print(loctime)

# 随机数
ran = random.random()
print(ran)
print(random.randint(1, 9))

# 绘图模块
turtle.screensize(800, 600)
# 画笔宽度为1
turtle.pensize(1)
# 画笔颜色
turtle.pencolor('black')
# 绘画速度
turtle.speed(10)

TJT_color = {1: 'white', -1: 'black'}
color_list = [1, -1]
# 半径
R = 100
for c in color_list:
    print(c)
    # 获取该半边的填充色
    turtle.fillcolor(TJT_color.get(c))

    turtle.begin_fill()  # 开始填充
    # 开始画出半边的轮廓
    turtle.circle(R / 2, 180)
    turtle.circle(R, 180)
    turtle.circle(R / 2, -180)
    turtle.end_fill()  # 结束填充 上色完成

    # 绘制该半边的鱼眼
    turtle.penup()  # 提起画笔，移动不留痕
    turtle.goto(0, R / 3 * c)  # 移动到该半边的鱼眼的圆上 R/3*c 表示移动到哪边
    turtle.pendown()  # 放下画笔，移动留痕
    turtle.fillcolor(TJT_color.get(-c))  # 获取鱼眼填充色, 与该半边相反
    turtle.begin_fill()
    turtle.circle(-R / 6, 360)
    turtle.end_fill()

    # 回到原点，为下一循环的开始做准备
    turtle.penup()
    turtle.goto(0, 0)
    turtle.pendown()

import random

# 随机生成一个0-1以内的随机小数
ran=random.random()
print(ran)
# 如果seed() 不给参数，里面的参数为系统时间
# seed(1),如果给了固定值，随机出来的数也是固定值
random.seed(1)
ran=random.random()
print(ran)
random.seed(1)
dom=random.random()
print(dom)

import random

in1=random.randint(1,10)
print("随机整数{}".format(in1))
ra=random.randrange(1,10,3)#[1,4,7]
print(ra)
# 随你返回(a,b)，a-b 之间的一个小数
kk=random.uniform(10,31)
print(kk)

# choice(seq)返回序列中随机一个数
c=["石头","剪刀","布"]
print(random.choice(c))

# shuffle(seq) 将序列类型中元素随机排列，返回打乱后的序列
a=["你好","哈哈","sda","嗯嗯"]
random.shuffle(a)
print(a)
# sample(pop,k) 从pop 类型中随机选取k个元素，一列表类型返回
a=["你好","哈哈","sda","嗯嗯"]
print(random.sample(a,2))

import turtle
# 绘图模块
turtle.screensize(800, 600)
# 画笔宽度为1
turtle.pensize(1)
# 画笔颜色
turtle.pencolor('black')
# 绘画速度
turtle.speed(10)

TJT_color = {1: 'white', -1: 'black'}
color_list = [1, -1]
# 半径
R = 100
for c in color_list:
    print(c)
    # 获取该半边的填充色
    turtle.fillcolor(TJT_color.get(c))

    turtle.begin_fill()  # 开始填充
    # 开始画出半边的轮廓
    turtle.circle(R / 2, 180)
    turtle.circle(R, 180)
    turtle.circle(R / 2, -180)
    turtle.end_fill()  # 结束填充 上色完成

    # 绘制该半边的鱼眼
    turtle.penup()  # 提起画笔，移动不留痕
    turtle.goto(0, R / 3 * c)  # 移动到该半边的鱼眼的圆上 R/3*c 表示移动到哪边
    turtle.pendown()  # 放下画笔，移动留痕
    turtle.fillcolor(TJT_color.get(-c))  # 获取鱼眼填充色, 与该半边相反
    turtle.begin_fill()
    turtle.circle(-R / 6, 360)
    turtle.end_fill()

    # 回到原点，为下一循环的开始做准备
    turtle.penup()
    turtle.goto(0, 0)
    turtle.pendown()

requests scrapy

numpy scipy pandas

pdfminer openpyxl python-docx beautifulsoul

matplotlib TVTK mayavi

PyQt5 wxPython PyGTK

Theano TensorFlow scikiy-learn

Django Pyramid Flask

Pygame Panda3d cocos2d

PIL SymPy NLTK WeRoBot MYQR

pip install <拟安装命令>

pip list