defbobo

Problem:
run import OpenSSL, meet:
     11 from cryptography import utils
     12 from cryptography.exceptions import InternalError
---> 13 from cryptography.hazmat.bindings._openssl import ffi, lib
     14 from cryptography.hazmat.bindings.openssl._conditional import CONDITIONAL_NAMES
     15

ImportError: DLL load failed: The operating system cannot run %1.

defbobo

#! /usr/bin/env python2.7
#encoding:utf-8
#@description:一个python守护进程的例子
#@tags:python,daemon
import sys
import os
import time
import atexit
from signal import SIGTERM 

defbobo

# Change YOUR_TOKEN to your prerender token and uncomment that line if you want to cache urls and view crawl stats
# Change example.com (server_name) to your website url
# Change /path/to/your/root to the correct value

server {
    listen 80;
    server_name example.com;
 
    root   /path/to/your/root;
    index  index.html;

defbobo

Simple cheatsheets

Including git, vagrant, pandas

defbobo

Personal Linux program installation Note

1. mysql installation

sudo apt-get install mysql-server
sudo apt-get install mysql-client
sudo apt-get install libmysqlclient-dev

2. redis installation

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Multiple SSH Keys settings for different github account

create different public key

create different ssh key according the article Mac Set-Up Git

$ ssh-keygen -t rsa -C "your_email@youremail.com"

defbobo

How to recover lost Python source code if it's still resident in-memory

I screwed up using git ("git checkout --" on the wrong file) and managed to delete the code I had just written... but it was still running in a process in a docker container. Here's how I got it back, using https://pypi.python.org/pypi/pyrasite/ and https://pypi.python.org/pypi/uncompyle6

Attach a shell to the docker container

Install GDB (needed by pyrasite)

apt-get update && apt-get install gdb

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yum groupinstall 'Development Tools'
yum install zlib-devel bzip2-devel  openssl-devel ncurses-devel
wget  https://www.python.org/ftp/python/3.5.0/Python-3.5.0.tar.xz
tar Jxvf  Python-3.5.0.tar.xz
cd Python-3.5.0
./configure --prefix=/usr/local/python3
make && make install
echo 'export PATH=$PATH:/usr/local/python3/bin' >> ~/.bashrc
rm   /usr/bin/python
ln -sv  /usr/local/bin/python3.5 /usr/bin/python