How to Extract Query Parameters from a URL in Python, Including Django?

Retrieving Parameters from a URL

Question:

Given a URL with query parameters, how can you retrieve the value of a specific parameter? For instance, given the URL '/some_path?some_key=some_value', you want to extract the value of 'some_key'. Additionally, if using Django, is there a method in the request object to assist with this task?

When using 'self.request.get('some_key')', the expected value 'some_value' is not returned. How can this issue be resolved?

Answer:

While extracting URL parameters is not specifically related to Django, the following solution is generally applicable to Python:

Python 2:

<code class="python">import urlparse

url = 'https://www.example.com/some_path?some_key=some_value'
parsed = urlparse.urlparse(url)
captured_value = urlparse.parse_qs(parsed.query)['some_key'][0]

print captured_value</code>

Python 3:

<code class="python">from urllib.parse import urlparse
from urllib.parse import parse_qs

url = 'https://www.example.com/some_path?some_key=some_value'
parsed_url = urlparse(url)
captured_value = parse_qs(parsed_url.query)['some_key'][0]

print(captured_value)</code>

In both cases, 'parse_qs' returns a list. Indexing the list with '[0]' retrieves the first element, which is the desired value.

Optional Django Solution:

Refer to the response provided by @jball037 for a Django-specific solution.

The above is the detailed content of How to Extract Query Parameters from a URL in Python, Including Django?. For more information, please follow other related articles on the PHP Chinese website!