Tony mobilestack

pip uninstall pycurl

export PYCURL_SSL_LIBRARY=openssl

pip install pycurl

from transloadit/python-sdk#4 @ifedapoolarewaju

Solve a deployment problem

Problem：psycopg2 not found

This afternoon I have met a problem for my website, it is not accessible due to an error of psycopg2, which is a module for python to connect with Postgresql database. I would like to document this to public for anyone in future for a referrence.

After the problem occurred, I blamed AWS, that everything was running OK and it just suddenly failed. The fact is that I didn't change anything in between, which is annoying. Or maybe one of the system upgrade suggested by AWS was the reason, I remembered that several packages was installed, but it seemed the problem had not really instantly occurred. But anyhow, the problem has to be solved, after waiting for serveral hours, I started to debug it. The problem states that:

ImproperlyConfigured: Error loading psycopg2 module: No module named psycopg2

which apprently means that psycopg2 is not found by my web server.

in south migration, if add a new column of foreign key constraint, only one line is fine. However, if changing from one existing field which is not a foreign key type, i.e. only a integer type, then should add a line of code

db.create_index

after db.alter_column

though create_index is only for speed consideration.

This is for add a new field of fk constraint:

	location @webserver {
	if ($request_method = 'OPTIONS') {

	add_header 'Access-Control-Allow-Origin' '*';
	add_header 'Access-Control-Allow-Credentials' 'true';
	add_header 'Access-Control-Allow-Methods' 'GET, POST, OPTIONS';
	add_header 'Access-Control-Allow-Headers' 'Authorization,DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type';
	add_header 'Access-Control-Max-Age' 1728000;
	add_header 'Content-Type' 'text/plain charset=UTF-8';
	add_header 'Content-Length' 0;

	# Basics of Elliptic Curve Cryptography implementation on Python
	import collections


	def inv(n, q):
	"""div on PN modulo a/b mod q as a * inv(b, q) mod q
	>>> assert n * inv(n, q) % q == 1
	"""
	for i in range(q):
	if (n * i) % q == 1:

	#!/usr/bin/env python
	"""
	Very simple HTTP server in python.

	Usage::
	./dummy-web-server.py [<port>]

	Send a GET request::
	curl http://localhost

	import socket, ssl, json, struct
	import binascii

	# device token returned when the iPhone application
	# registers to receive alerts
	deviceToken = '39cac56f 986a0e66 3c4fd4f4 68df5598 024d2ca3 8b9f307c 741c180e 9fc30c62'

	thePayLoad = {
	'aps': {
	'alert':'Oh no! Server\'s Down!',

	"""
	badwords source: https://github.com/shutterstock/List-of-Dirty-Naughty-Obscene-and-Otherwise-Bad-Words/blob/master/en
	badwords source 2: http://urbanoalvarez.es/blog/2008/04/04/bad-words-list/
	"""

	f = open("badwords.txt")
	lines = f.readlines()
	lines2 = []
	for i in lines:
	#remove trailing and prepending space

	tt = target_user.created_time
	tt_int = time.mktime(tt.timetuple())