Hi,
That's called string interpolation. Check here:
https://stackoverflow.com/questions/11788472/does-python-has-a-similar-variable-interpolation-like-string-var-in-ruby
Not the best explanation, but should get you going.
Regards,
Andréas
2018-01-17 7:27 GMT+01:00 <cherngyo...@gmail.com>:
> May i know what does this means:
>
> def query_pokeapi(resource_url):
> url = '{0}{1}'.format(BASE_URL, resource_url)
> response = requests.get(url)
>
>
> the '{0}{1}' and resource_url
>
>
> On Wednesday, January 17, 2018 at 3:02:06 PM UTC+9, Matemática A3K wrote:
>>
>>
>>
>> On Wed, Jan 17, 2018 at 1:42 AM, <chern...@gmail.com> wrote:
>>
>>> As this is the first time I'm trying this out, I do not know what is
>>> wrong with the problem. So it would be great if someone can help me solve
>>> this problem
>>>
>>>
>>> The code I'm using is at the bottom page of this website:
>>> https://www.twilio.com/blog/2014/11/build-your-own-
>>> pokedex-with-django-mms-and-pokeapi.html
>>>
>>> Where it give example on how you can make HTTP request function and
>>> retrieve database on your query.
>>>
>>>
>>> The code on the website is this.
>>>
>>> *query.py*
>>>
>>> import requestsimport json
>>>
>>> BASE_URL = 'http://pokeapi.co'
>>>
>>> def query_pokeapi(resource_url):
>>> url = '{0}{1}'.format(BASE_URL, resource_url)
>>> response = requests.get(url)
>>>
>>> if response.status_code == 200:
>>> return json.loads(response.text)
>>> return None
>>>
>>> If there is not a 200 response it returns None
>>
>>>
>>>
>>>
>>> charizard = query_pokeapi('/api/v1/pokemon/charizard/')
>>>
>>>
>> It's because charizard is None
>>
>>>
>>> sprite_uri = charizard['sprites'][0]['resource_uri']
>>>
>>> that can't do None['sprites']...
>>
>>>
>>> description_uri = charizard['descriptions'][0]['resource_uri']
>>>
>>> sprite = query_pokeapi(sprite_uri)
>>> description = query_pokeapi(description_uri)
>>> print
>>> charizard['name']print
>>> description['description']print
>>> BASE_URL + sprite['image']
>>>
>>>
>>> In my edit, I only change these print line at the bottom of this
>>>
>>> *query.py*
>>>
>>> print(charizard['name'])print(description['description'])print(BASE_URL +
>>> sprite['image'])
>>>
>>>
>>> But i got this error instead
>>>
>>> Traceback (most recent call last): File "query2.py", line 46, in
>>> sprite_uri = charizard['sprites'][0]['resource_uri'] TypeError:
>>> 'NoneType' object is not subscriptable
>>>
>>> And that's why the error
>>
>>
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