setup.py

#!/usr/bin/python2.7
import os, subprocess, sys
isflaskdir_exist = os.path.exists('requirements.txt')
if isflaskdir_exist:
    subprocess.call(['rm','-fr','flask'])
subprocess.call(['python2.7', 'virtualenv.py', 'flask'])
if sys.platform == 'win32':
    bin = 'Scripts'
else:
    bin = 'bin'
# subprocess.call(['source', os.path.join('flask', bin, 'activate')])
isexist_requirements = os.path.exists('requirements.txt')

if isexist_requirements:
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', '-r', 'requirements.txt'])
else:
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask<0.10'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-login'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-openid'])
    if sys.platform == 'win32':
        subprocess.call([os.path.join('flask', bin, 'pip'), 'install', '--no-deps', 'lamson', 'chardet', 'flask-mail'])
    else:
        subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-mail'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'sqlalchemy==0.7.9'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-sqlalchemy'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'sqlalchemy-migrate'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-whooshalchemy'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-wtf'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flask-babel'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'flup'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'guess-language-spirit'])
    subprocess.call([os.path.join('flask', bin, 'pip'), 'install', 'coverage'])