Daniel Lew Daniel Lew - 2 months ago 31
JSON Question

Python 2 vs. Python 3 - urllib formats

I'm getting really tired of trying to figure out why this code works in Python 2 and not in Python 3. I'm just trying to grab a page of json and then parse it. Here's the code in Python 2:

import urllib, json
response = urllib.urlopen("http://reddit.com/.json")
content = response.read()
data = json.loads(content)


I thought the equivalent code in Python 3 would be this:

import urllib.request, json
response = urllib.request.urlopen("http://reddit.com/.json")
content = response.read()
data = json.loads(content)


But it blows up in my face, because the data returned by read() is a "bytes" type. However, I cannot for the life of me get it to convert to something that json will be able to parse. I know from the headers that reddit is trying to send utf-8 back to me, but I can't seem to get the bytes to decode into utf-8:

import urllib.request, json
response = urllib.request.urlopen("http://reddit.com/.json")
content = response.read()
data = json.loads(content.decode("utf8"))


What am I doing wrong?

Edit: the problem is that I cannot get the data into a usable state; even though json loads the data, part of it is undisplayable, and I want to be able to print the data to the screen.

Second edit: The problem has more to do with print than parsing, it seems. Alex's answer provides a way for the script to work in Python 3, by setting the IO to utf8. But a question still remains: why is it that the code worked in Python 2, but not Python 3?

Answer

The code you post is presumably due to wrong cut-and-paste operations because it's clearly wrong in both versions (f.read() fails because there's no f barename defined).

In Py3, ur = response.decode('utf8') works perfectly well for me, as does the following json.loads(ur). Maybe the wrong copys-and-pastes affected your 2-to-3 conversion attempts.

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