Python¶

Numpy 中文

# python2   SimpleHTTPServer
python -m SimpleHTTPServer 8008

# python3
python -m http.server 8008

# 查找python安装包的路径 site-packages

python -m site              # 系统目录
python -m site --user-site  # 用户目录

打包¶

python3编译成pyc文件

python3 -m compileall -b .           # -b: 生成的pyc与源代码在同一目录
find . -name '*.py' |xargs rm -rf    # . 删除py文件
find . -name 'pycache' |xargs rm -rf # 删除pycache目录

Book¶

国内镜像源¶

Linux

mkdir $HOME/.pip
tee $HOME/.pip/pip.conf <<-'EOF'
[global]
index-url = https://mirrors.aliyun.com/pypi/simple/

[install]
trusted-host=mirrors.aliyun.com
EOF

Windows

在文件夹的地址栏输入 %appdata% （即进入这个文件夹）。

在当前文件夹下新建一个pip文件夹。

进入pip文件夹，新建一个pip.ini文件

virtualenv¶

# old  version
#virtualenv --no-site-packages venv
#virtualenv -p /usr/bin/python3.6  --no-site-packages venv

# new version 20.0.13
virtualenv --python=python3 venv
source venv/bin/activate #启动环境
deactivate  # 退出删除环境


pip freeze  # 查看当前安装版本
pip freeze > requirements.txt

virtualenvwrapper

待整理

python 语法规则¶

python规则指定,所有在赋值语句左面的变量都是局部变量

a=5
def func():
    # global a  # 注释掉此行，报错
    a = a+11
    print a

func()

Django 教程

python库¶

# 键盘事件监听
from pykeyboard import PyKeyboardEvent
import time

class TapRecord(PyKeyboardEvent):
  def __init__(self):
    PyKeyboardEvent.__init__(self)

  def tap(self, keycode, character, press):
    print(time.time(), keycode, character, press)

t = TapRecord()
t.run()

# 查看字符串 编码
import chardet
fencoding=chardet.detect(u"test string")
print fencoding

# 从URL地址提取文件名
import os
url = 'http://www.jb51.net/images/logo.gif'
filename = os.path.basename(url)
print(filename)

# 去除扩展名
print os.path.splitext(filename)[0]

# 打印方法名
import inspect
import sys
for  method in  inspect.getmembers(sys.path):
    print method

Linux 下编译windows Exe¶

sudo apt-get install wine32 winetricks
winetricks python

cd ~/.wine/drive_c/Python26
#wine msiexec /i python-2.7.15.msi /L*v log.txt
wine msiexec /i python-2.7.15.msi

wine python.exe Scripts/pip.exe install pyinstaller -i    https://pypi.mirrors.ustc.edu.cn/simple
wine python.exe Scripts/pip.exe install --upgrade pip -i  https://pypi.mirrors.ustc.edu.cn/simple
#wine python.exe Scripts/pip.exe install pyserial -i    https://pypi.mirrors.ustc.edu.cn/simple

cd ~/workspace

tee HelloWorld.py <<-"EOF"
print('hello world!')
EOF

wine ~/.wine/drive_c/Python27/Scripts/pyinstaller.exe --onefile HelloWorld.py
wine dist/HelloWorld.exe

sudo dpkg --add-architecture i386 # 开启32位架构支持
sed -i 's/archive.ubuntu.com/mirrors.aliyun.com/' /etc/apt/sources.list
apt-get update

apt-get install -y curl
apt-get install -y wine32
#apt-get install -y --fix-missing winetricks

curl -o python-2.7.15.msi https://www.python.org/ftp/python/2.7.15/python-2.7.15.msi
wine msiexec /i python-2.7.15.msi /q   #Dockerfile 有问题？？？, 手动安装没问题
rm -f  python-2.7.15.msi

PY_HOME=${HOME}/.wine/drive_c/Python27
wine ${PY_HOME}/python.exe ${PY_HOME}/Scripts/pip.exe install pyinstaller   -i  https://pypi.mirrors.ustc.edu.cn/simple
wine ${PY_HOME}/python.exe ${PY_HOME}/Scripts/pip.exe install --upgrade pip -i  https://pypi.mirrors.ustc.edu.cn/simple

其他¶

python全栈学习路线-查询笔记

机器学习¶

https://github.com/Avik-Jain/100-Days-Of-ML-Code

build int docker¶

build install python¶

# 编译前安装 , 否则pip 报错误
sudo apt-get install openssl
sudo apt-get install libssl-dev

Ubuntu 16.04 安装 Python3.6
- python3.6安装报错ZipImportError...zlib not available

示例¶

UDP 接收超时¶

#coding=utf-8
import socket,sys
import time

s=socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)

IP=socket.gethostbyname(socket.gethostname())
s.settimeout(30) #设置超时  
s.bind((IP,1080))

print ("等待数据中。。。。")
while True:
    try:
        s.settimeout(0.02)    # 200ms 超时
        d,a=s.recvfrom(8192)

        print ("%s 在 %s发来数据 ：%s "%(a,time.ctime(),d))
#        s.sendto('[%s] %s'%(time.ctime(),d),a)  
#        print ("收到数据并且返回到：",a)  
    except socket.timeout:
        print ("时间到！")

s.close()