Python

divmod(7,2) //(3,1)

if b > a:
  print("b is greater than a")
elif a == b:
  print("a and b are equal")
else:
  print("a is greater than b")

fruits = ["apple", "banana", "cherry"]
for x in fruits:
  print(x)

a,b = 2,0

a,b = 2,0
a,b,a = 1,a,4
>>>a,b(4,2)

def reverseList(head):
    prev = None
    while head:
        cur = head
        head = head.next
        cur.next = prev
        prev = cur
    return prev

def reverseList(head):
    prev = None
    while head:
        head.next,prev,head = prev,head,head.next
    return prev

if __name__ == '__main__':

L = range(1,5)#创建连续list，即[1,2,3,4],间隔默认为1，不包含最后一个元素
L = range(1,10,2)#创建间隔为2的连续list，即[1,3,5,7,9],同样不包含最后一个元素
L.append(var) #追加元素
L.insert(index,var)#在指定位置追加元素
L.pop(var) #返回最后一个元素，并在list中删除
L.remove(var) #删除第一次出现的该元素
L.count(var) #该元素在列表中出现的个数
L.remove(var) #删除第一次出现的该元素
L.extend(list) #追加list，即合并list到L上
L.sort() #排序
L.reverse() #倒序
len(L)#获取列表长度
del L[1] #删除指定下标的元素
del L[1:3] #删除指定下标范围的元素

m = n = 3
test = [[0] * m] * n
print("test =", test)

test[0][0] = 233
print("test =", test)

//输出
test = [[0, 0, 0], [0, 0, 0], [0, 0, 0]]
test = [[233, 0, 0], [233, 0, 0], [233, 0, 0]]

test = [[0 for i in range(m)] for j in range(n)]

dict_1={
  'name':'zhangsan',
  'age':22,
  'phone':110,
  'sex':'男'
}
dict2=dict.copy() #克隆字典，即另一个拷贝。

name=dict_1['name']

//如果key不存在则直接添加数据，如果key存在则修改数据
dict_1['name']='lisi'
dict_1['sss']='4s'

del dict['Name']  # 删除键是'Name'的条目
dict.clear()      # 清空字典所有条目
del dict 

keys=dict_1.keys()

values=dict_1.values()
#for循环 取出所有的value
for value in values:
    print(value)

items=dict_1.items()
#for循环遍历items
for item in items:
    # print(item)
    #从元组中 根据索引取出数据
    key=item[0]
    value=item[1]
    print('键：%s值：%s'%(key,value))

#python2中 有has_key函数，可以直接调用
dict_1.has_key(key)
if 'phone' in dict_1.keys():
    print('有这个key')
else:
    print('没有这个key')

import threading

pip install requests

from smtplib import SMTP
from email.header import Header
from email.mime.text import MIMEText


def main():
    # 请自行修改下面的邮件发送者和接收者
    sender = 'abcdefg@126.com'
    receivers = ['uvwxyz@qq.com', 'uvwxyz@126.com']
    message = MIMEText('用Python发送邮件的示例代码.', 'plain', 'utf-8')
    message['From'] = Header('王大锤', 'utf-8')
    message['To'] = Header('骆昊', 'utf-8')
    message['Subject'] = Header('示例代码实验邮件', 'utf-8')
    smtper = SMTP('smtp.126.com')
    # 请自行修改下面的登录口令
    smtper.login(sender, 'secretpass')
    smtper.sendmail(sender, receivers, message.as_string())
    print('邮件发送完成!')


if __name__ == '__main__':
    main()

from smtplib import SMTP
from email.header import Header
from email.mime.text import MIMEText
from email.mime.image import MIMEImage
from email.mime.multipart import MIMEMultipart

import urllib


def main():
    # 创建一个带附件的邮件消息对象
    message = MIMEMultipart()
    
    # 创建文本内容
    text_content = MIMEText('附件中有本月数据请查收', 'plain', 'utf-8')
    message['Subject'] = Header('本月数据', 'utf-8')
    # 将文本内容添加到邮件消息对象中
    message.attach(text_content)

    # 读取文件并将文件作为附件添加到邮件消息对象中
    with open('/Users/Hao/Desktop/hello.txt', 'rb') as f:
        txt = MIMEText(f.read(), 'base64', 'utf-8')
        txt['Content-Type'] = 'text/plain'
        txt['Content-Disposition'] = 'attachment; filename=hello.txt'
        message.attach(txt)
    # 读取文件并将文件作为附件添加到邮件消息对象中
    with open('/Users/Hao/Desktop/汇总数据.xlsx', 'rb') as f:
        xls = MIMEText(f.read(), 'base64', 'utf-8')
        xls['Content-Type'] = 'application/vnd.ms-excel'
        xls['Content-Disposition'] = 'attachment; filename=month-data.xlsx'
        message.attach(xls)
    
    # 创建SMTP对象
    smtper = SMTP('smtp.126.com')
    # 开启安全连接
    # smtper.starttls()
    sender = 'abcdefg@126.com'
    receivers = ['uvwxyz@qq.com']
    # 登录到SMTP服务器
    # 请注意此处不是使用密码而是邮件客户端授权码进行登录
    # 对此有疑问的读者可以联系自己使用的邮件服务器客服
    smtper.login(sender, 'secretpass')
    # 发送邮件
    smtper.sendmail(sender, receivers, message.as_string())
    # 与邮件服务器断开连接
    smtper.quit()
    print('发送完成!')


if __name__ == '__main__':
    main()

import urllib.parse
import http.client
import json


def main():
    host  = "106.ihuyi.com"
    sms_send_uri = "/webservice/sms.php?method=Submit"
    # 下面的参数需要填入自己注册的账号和对应的密码
    params = urllib.parse.urlencode({'account': '你自己的账号', 'password' : '你自己的密码', 'content': '您的验证码是：147258。请不要把验证码泄露给其他人。', 'mobile': '接收者的手机号', 'format':'json' })
    print(params)
    headers = {'Content-type': 'application/x-www-form-urlencoded', 'Accept': 'text/plain'}
    conn = http.client.HTTPConnection(host, port=80, timeout=30)
    conn.request('POST', sms_send_uri, params, headers)
    response = conn.getresponse()
    response_str = response.read()
    jsonstr = response_str.decode('utf-8')
    print(json.loads(jsonstr))
    conn.close()


if __name__ == '__main__':
    main()

pip install ruff

ruff path/to/code/to/lint.py  # Run Ruff over `lint.py`
ruff path/to/code/            # Run Ruff over all files in `/path/to/code` (and any subdirectories)
ruff path/to/code/*.py        # Run Ruff over all `.py` files in `/path/to/code`

ruff path/to/code/ --watch

- repo: https://github.com/charliermarsh/ruff-pre-commit
  # Ruff version.
  rev: 'v0.0.221'
  hooks:
    - id: ruff
      # Respect `exclude` and `extend-exclude` settings.
      args: ["--force-exclude"]

[tool.ruff]
line-length = 88

# Enable Pyflakes `E` and `F` codes by default.
select = ["E", "F"]
ignore = []

# Exclude a variety of commonly ignored directories.
exclude = [
    ".bzr",
    ".direnv",
    ".eggs",
    ".git",
    ".hg",
    ".mypy_cache",
    ".nox",
    ".pants.d",
    ".ruff_cache",
    ".svn",
    ".tox",
    ".venv",
    "__pypackages__",
    "_build",
    "buck-out",
    "build",
    "dist",
    "node_modules",
    "venv",
]
per-file-ignores = {}

# Allow unused variables when underscore-prefixed.
dummy-variable-rgx = "^(_+|(_+[a-zA-Z0-9_]*[a-zA-Z0-9]+?))$"

# Assume Python 3.10.
target-version = "py310"

[tool.ruff.mccabe]
# Unlike Flake8, default to a complexity level of 10.
max-complexity = 10

pip install pre-commit

class Node(object)
        def _init_(sef,data,next = None):
               self.data = data
               self.next = next

pip3 install poetry

poetry --version

poetry init

poetry install

## 激活虚拟环境
poetry shell

## 查看python版本
poetry run python -v

## 执行脚本
poetry run python app.py

## 安装包
poetry add flask

## 追踪 & 更新包
poetry show
poetry show --tree

## 更新所有锁定版本的依赖
poetry update

## 卸载包
poetry remove dep_name