get unicode error when print in html flask - unicode

Question

Getting unnicode error when print in html Flask.
Here is my code.
{% if(backpaths) %}
{% for n in backpaths:%}
{% print '%s'%n %}
</br>
{% endfor %}
{% endif %}
I tried to use n.decode('utf-8') but it didn't work and got same error
backpaths is set to:
['1\xe6\x9c\x89 --(HYPER)--> quantifier={indefinite|\xe4\xb8\x8d\xe5\xae\x9a\xe6\x8c\x87} --(HYPO)--> \xe6\x9c\x89 ', '2\xe6\x9c\x89 --(HYPER)--> exist|\xe5\xad\x98\xe5\x9c\xa8 --(HYPO)--> \xe6\x9c\x89 ']
here is the traceback
(most recent call last):
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1477, in full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1381, in handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1475, in full_dispatch_request
rv = self.dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1461, in dispatch_request
return self.view_functions[rule.endpoint](**req.view_args)
File "/home/ganchimeg/FlaskApp/FlaskApp/__init__.py", line 125, in homepage
return render_template('index.html', backpaths=successPaths)
File "/usr/local/lib/python2.7/dist-packages/flask/templating.py", line 128, in render_template
context, ctx.app)
File "/usr/local/lib/python2.7/dist-packages/flask/templating.py", line 110, in _render
rv = template.render(context)
File "/usr/local/lib/python2.7/dist-packages/jinja2/environment.py", line 969, in render
return self.environment.handle_exception(exc_info, True)
File "/usr/local/lib/python2.7/dist-packages/jinja2/environment.py", line 742, in handle_exception
reraise(exc_type, exc_value, tb)
File "/home/ganchimeg/FlaskApp/FlaskApp/templates/index.html", line 31, in top-level template code
{{ n }}
UnicodeDecodeError: 'ascii' codec can't decode byte 0xe6 in position 16: ordinal not in range(128)

Answer 1

You don't have Unicode strings, you have byte strings. Python tries to implicitly decode those using the standard ASCII codec. Explicitly decode them:
{% if(backpaths) %}
{% for n in backpaths:%}
{{ n.decode('utf8') }}
</br>
{% endfor %}
{% endif %}
It'll be better if you passed in backpaths into the template ready-decoded.