num = 666
# 注释
"""
批量注释
"""
print("余额：", num)
print(type(num))
# 类型转换
ld = str(11)
print(type(ld))
num_ld = int("111")
print(type(num_ld))
"""
中文 英文 下划线 数字 数字不能开头
大小写敏感
关键字
"""
"""
常见7种运算符
+
-
*
/
// 取整
% 取余数
** 指数
复合运算
+=
"""
"""
字符串
可以\,或者单引号 双引号错开使用
"""
name1 = 'hello'
name2 = "hello2"
name3 = """hello3"""
"""
+ 只能用于字符串拼接
错误：”hello“ + 111
"""
tclass = "student"
count = 1111
message = "学生：%s, 人数：%s" % (tclass,count)
message = "学生：%s, 人数：%d" % (tclass,count)
# message = "学生：%s, 人数：%f" % (tclass,count)
print(message)
"""
精度控制
m 控制位数
n 小数点精度
%5.2f
"""
#字符串快速格式化 f:format
print(f"学生{tclass}，人数{count}")
"""
数据输入:
input 输入的收拾str
"""
# print("input your name:")
# my_name = input("...")
# print("name is :",my_name)
"""
判断
True
False
"""
"""
if判断
"""
age = 17
if age > 18:
print("old people")
elif age > 16:
print("m people")
else:
print("new people")
"""
循环语句
while
for
continue
break
"""
i = 1
while i < 10 :
print("l love u")
i = i + 1
print("hello",end="")
print("world",end="")
print("hello \t world")
str_name = "i like fish"
for x in str_name:
print(x)
for x in range(5):
if x == 3:
continue
if x == 4:
break
print(x)
print(range(3,9))
print(range(3,9,2))
"""
函数：
参数
返回值
注释
函数嵌套
global 全局变量
"""
def my_len(data):
scount = 0
for x in data:
scount+=1
print(f"长度为{scount}")
test_len = "ssssss"
my_len(test_len)
print(f"无返回类型{my_len(test_len)}")
def add(x,y):
"""
相加
:param x:
:param y:
:return:
"""
return x+y
print( add(3,5) )
# cc = 55
def pp():
global cc
cc = 100
print(cc)
pp()
print(cc)
"""
数据容器 ： list tuple str set dict
"""
#list
name_list = ["sss","aaaa","ccc",['c','rrr'],True]
print(name_list)
print(type(name_list))
print(name_list[0])
print(name_list[-1])
print(name_list.index("ccc"))
name_list[1] = "sda"
print(name_list)
name_list.insert(1,"ghgg")
print(name_list)
name_list.append("vvv")
print(name_list)
del name_list[2]
print(name_list)
ps = name_list.pop(2)
print(name_list)
name_list.remove("vvv")
print(name_list)
# name_list.clear()
# print(name_list)
tc = name_list.count("sss")
print(tc)
print(len(name_list))
for x in name_list:
print(x)
# tuple
tp = (1,2,'ccc')
print(tp)
t1 = ("hello")
print(type(t1))
t2 = ("hello",)
print(type(t2))
print(tp[1])
#str 不能修改
my_str = "111 hello str 11"
print(my_str[3])
print(my_str.index("o"))
new_str = my_str.replace("h","p")
print(new_str)
ss = my_str.split("l")
print(ss)
# 去除前后空格
ms = my_str.strip()
print(ms)
mk = my_str.strip("11")
print(mk)
# 序列切片
ss_list = [1,2,3,4,5,6]
print(ss_list[1:3])
print(ss_list[::-1])
# set集合
em = {"aa","bb","cc"}
print(type(em))
em.add("kk")
print(em)
em1 = {"aa","bb","cc","vvv"}
print(em1.difference(em))
print(em1.union(em))
for x in em:
print(x)
# 字典 dict key:除字典任意数据 value：任意数据
my_dict = {"name":"zz","age":23}
print(my_dict)
nn = my_dict["name"]
print(nn)
my_dict["add"] = "bj"
print(my_dict)
my_dict.pop("add")
print(my_dict)
mk = my_dict.keys()
print(mk)
for key in my_dict:
print(key)
print(sorted(my_dict))
print(sorted(my_dict,reverse=True ))
"""
函数高阶：
多返回值
关键字传参
缺省参数
不定长参数
"""
def test_re():
return 1 ,2
xxc,xxy = test_re();
print(xxc)
print(xxy)
def text_xx(x,y = 10):
print(x)
print(y)
text_xx(y=4,x=6)
text_xx(5)
# 不定长 - 位置不定长 参数以元组形式存在
def user_info(*names):
print(names)
nl = ['a','b']
user_info(nl)
user_info('a','b')
# 不定长 - 关键字不定长**
def user_info2(**kwargs):
print(kwargs)
user_info2(name ="zz1",age = 1)
#函数作为参数 逻辑的传入
def test_fc(com):
rs = com(1,3)
print(rs)
def com(x,y):
return x +y
test_fc(com)
test_fc(lambda x,y:x+y)
"""
文件的操作 r w a
"""
# f = open("hello.txt","r",encoding="utf-8")
# print(type(f))
# i1 = f.read()
# print(i1)
# i2 = f.readlines()
# print(i2)
# for line in f :
# print(line)
# f.close()
#自动关闭文件流
# with open("hello.txt","w",encoding="utf-8") as f:
# # for line in f:
# # print(line)
# f.write("ccccc")
# f.flush()
#
with open("hello.txt","a",encoding="utf-8") as f:
# for line in f:
# print(line)
f.write("cccccccccccccssssssssss")
f.flush()
"""
异常
捕获异常
异常传递
"""
try:
3/0
except:
print("error")
try:
print(fsad)
except NameError as e:
print("error")
print(e)
try:
print("sss")
except NameError as e:
print("error")
print(e)
else:
print("sssvv")
finally:
print("vvvv")
"""
模块导入
main
all
"""
#import time
# print(time.gmtime())
# from time import sleep
# sleep(5)
# from time import *
# sleep(5)
import my_module1 as mm
aa = mm.test(2,4)
print(aa)
"""
图形可视化
折线图
json
地图
:
1）cmd控制台输入：conda env list，查看自己的环境，base是系统环境，myenv是自己创建的环境，我要激活的是自己创建的环境
2）cmd控制台输入：conda activate+环境名称，之后再输入python即为激活成功
"""
from pyecharts.charts import Line
line = Line()
line.add_xaxis(["ch_z","us","uk"])
line.add_yaxis("GDP",[30,20,11])
#全局设置
#line.set_global_opts()
line.render()
from pyecharts.charts import Map
map = Map()
data = [
("北京",111),
("上海",3231),
("成都",444),
]
map.add("测试地图",data,"china")
map.render()
"""
类
成员变量和方法
构造方法 __init__
__str__
__eq__
私有成员变量 __avg__
继承,多继承:属性重复，以左边的类为主
重写
父类调用
类型注解:仅仅是备注，错了代码也能跑
多态
"""
class Student:
name11 = None
age11 = 23
__avg__ = None
def say_hi(self,mes):
print(f"say :" ,{self.name11},mes)
def __init__(self,name11,age11):
self.name11 = name11;
self.age11 = age11;
def __str__(self):
return f"student",self.name11,self.age11
def __kk__(self):
print("sss")
# st = Student()
# st.age11 = 21
# st.name11 = "zz1"
# st.say_hi("xxx")
# print(st.name11)
# print(st.age11)
st2 = Student("aa",44)
print(st2.name11)
print(st2.age11)
print(st2.__str__())
class StudentPro(Student):
high = None
def __init__(self,high):
self.high = high;
sp = StudentPro(444)
sp.name11 = "ggg"
print(sp.high)
class Student66(Student):
nfc = None
def say(self,mes):
super().say_hi(mes)
def __init__(self):
None
s6 = Student66()
print(s6.say("ddd"))
var_1: int = 10
var_2: int = 10 # type: int
# sttu :Student = Student()
my_list1 : list = [2,3,45,5]
def add_plu(x:int ,y:int) -> int:
return x+y
class Animal:
def speak(self):
None
pass
class Cat(Animal):
def speak(self):
print("miao miao~~~")
class Dog(Animal):
def speak(self):
print("wang wang @@@")
def make(an:Animal):
an.speak()
cat = Cat()
dog = Dog()
# cat.speak()
# dog.speak()
make(dog)
make(cat)
"""
MYSQL
"""
from pymysql import Connection
conn = Connection(
host = "localhost",
port = 3306,
user="root",
password="123456",
autocommit=True
)
print(conn.get_server_info())
cursor = conn.cursor()
conn.select_db("cloud_user")
# cursor.execute("select * from tb_user")
# rs = cursor.fetchall()
# print(rs)
cursor.execute("insert into tb_user values(8, '柳岩2', '湖南省衡阳市2')")
# cursor.execute("select * from tb_user")
# rs = cursor.fetchall()
# print(rs)
#conn.commit()