The following code works correctly:
from jinja2 import Template
mylist = ['some text \xc3']
template = Template('{{ list }}')
print template.render(list=mylist)
When I run it, it outputs:
['some text \xc3']
Yet, when I try to print the actual list element, it fails:
template = Template('{{ list[0] }}')
print template.render(list=mylist)
The error is:
UnicodeDecodeError: 'ascii' codec can't decode byte 0xc3 in position 10: ordinal not in range(128)
I would like to find a way to print the individual list element in the same way that the whole list is printed, where the non-ascii character is represented with the \x notation.
From Jinja docs:
"Jinja2 is using Unicode internally which means that you have to pass Unicode objects to the render function or bytestrings that only consist of ASCII characters."
mylist = [u'some text \xc3']
You should never open an encoded file and not decode it.
You should either read the encoding from curl (e.g. with -i or -H option) and parse the HTTP headers or the output file if the encoding is not specified in the headers.
Or as an alternative to curl you can use the requests library which don't require writing to a file. Fetching a web resource will look like:
>>> r = requests.get('http://python.org')
>>> r.content
'<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML...
Where content is already encoded following the HTTP specification.
As an last approach you could guess an encoding and replace unknown chars. This would be the most easy solution to implement. For example:
with codecs.open(filename, encoding='utf-8', errors='replace') as fobj:
...
Your approach will always loose information (if there are non ascii chars). My first two approaches never and the last one only if the guessed encoding is wrong.
I figured it out. The key is to do str.encode('string-escape')
So, I did this:
template = Template('{{ list[0].encode("string-escape") }}')
And that worked.
jla is right for my case.
I use utf-8 for the python source files, so use u prefix sovled my problem.
来源：https://stackoverflow.com/questions/10908761/printing-non-ascii-characters-in-python-jinja