I am using the webapp2 framework on Google App Engine, and I'm getting a basic error in one of my Request Handlers.
The app is running ok in the local instance, but causes the following traceback on the deployed version of Google App Engine:
Here's the code:
import os
from google.appengine.ext.webapp import template
import webapp2
import logging
class MainHandler(webapp2.RequestHandler):
def get(self):
logging.info('hi there 34')
template_values = {}
self.response.out.write('hello world 4')
path = os.path.join(os.path.dirname(__file__), 'index.html')
## This is the code that causes the bug ##
self.response.out.write(template.render(path, template_values))
## ## ## ##
debug = os.environ.get('SERVER_SOFTWARE', '').startswith('Dev')
app = webapp2.WSGIApplication(
[(r'/main', MainHandler)],
debug = debug)
def main():
app.run()
traceback error:
Traceback (most recent call last):
File "/base/python27_runtime/python27_dist/lib/python2.7/wsgiref/handlers.py",
line 86, in run
self.finish_response()
File "/base/python27_runtime/python27_dist/lib/python2.7/wsgiref/handlers.py",
line 127, in finish_response
self.write(data)
File "/base/python27_runtime/python27_dist/lib/python2.7/wsgiref/handlers.py",
line 202, in write
assert type(data) is StringType,"write() argument must be string"
AssertionError: write() argument must be string
What does this error mean?