def save_db_settings_to_file(form):
path_to_store_settings = os.path.join(settings.BASE_DIR, 'SystemProyect')
for fname in os.listdir(path_to_store_settings):
    if fname=='conexion.cfg':
        full_path = os.path.join(path_to_store_settings, fname)
        remove(full_path)

database_id = 'db_app2'  # just something unique
newDatabase = {}
newDatabase["id"] = database_id
newDatabase['ENGINE'] = 'sql_server.pyodbc'
newDatabase['NAME'] = form.data['database']
newDatabase['USER'] = form.data['usuario_sql']
newDatabase['PASSWORD'] = form.data['password_sql']
newDatabase['HOST'] = form.data['servidor_sql']
newDatabase['PORT'] = ''
settings.DATABASES[database_id] = newDatabase

newDbString = """DATABASES={'%(id)s':{
'ENGINE': '%(ENGINE)s', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
'NAME': '%(NAME)s',                      # Or path to database file if using sqlite3.
'USER': '%(USER)s',                      # Not used with sqlite3.
'PASSWORD': '%(PASSWORD)s',                  # Not used with sqlite3.
'HOST': '%(HOST)s',                      # Set to empty string for localhost. Not used with sqlite3.
'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
'OPTIONS':"{'driver': 'SQL Server Native Client 10.0',}"
} }
"""% newDatabase
file_to_store_settings = os.path.join(path_to_store_settings, 'conexion' + ".py")
salvar=open(file_to_store_settings,'w')
salvar.write(newDbString)
salvar.close()

import os
path_to_store_settings =  os.path.join(os.path.dirname(os.path.dirname(os.path.abspath(__file__))), 'SystemProyect')
for fname in os.listdir(path_to_store_settings):
  if fname == 'conexion.py':
      full_path = os.path.join(path_to_store_settings, fname)
      with open(full_path) as fobj:
        archivo_inicio = fobj.read()
    exec(archivo_inicio)

DATABASES = {
    'versat': {
        'ENGINE': 'sql_server.pyodbc',  # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
        'NAME': 'eicma',  # Or path to database file if using sqlite3.
        'USER': 'tony',  # Not used with sqlite3.
        'PASSWORD': 'tony',  # Not used with sqlite3.
        'HOST': 'localhost',  # Set to empty string for localhost. Not used with sqlite3.
        'PORT': '',  # Set to empty string for default. Not used with sqlite3.
        'OPTIONS': "{'driver': 'SQL Server Native Client 10.0',}"
    }
}