Django snippets

#!/usr/local/bin/python
#coding:utf-8
import sys, os
import datetime
from django.core.management import setup_environ, DEFAULT_ACTION_MAPPING, startapp
try:
    import settings # Assumed to be in the same directory.
except ImportError:
    sys.stderr.write("Error: Can't find the file 'settings.py' in the directory containing %r. It appears you've customized things.\nYou'll have to run django-admin.py, passing it your settings module.\n(If the file settings.py does indeed exist, it's causing an ImportError somehow.)\n" % __file__)
    sys.exit(1)

project_directory = setup_environ(settings)
project_name = os.path.basename(project_directory)
os.environ['DJANGO_SETTINGS_MODULE'] = "%s.settings" % project_name

if __name__ == "__main__":    
    if len(sys.argv) <=1:
        sys.stderr.write("run xxx.yyy.run p1 p2 p2")
        sys.exit(1)

    classpath = sys.argv[1].split('.')
    if len(classpath) > 0:
        pkg = '.'.join(classpath[:-1])
        fr = classpath[-1]
    else:
        sys.stderr.write("path must has form of aaa.bbb")
        sys.exit(1)
        
    try:
        mod = __import__( pkg, '', '', fr)
    except ImportError:
        sys.stderr.write("path can't be found")
        sys.exit(1)

    cls = getattr(mod, fr)
    
    params = []
    for i in range(0,len(sys.argv)):
        if i != 1:
            params.append( sys.argv[i])
    
    cls(params)