Why Do JSON Strings Require Double Quotes in Python?

Single vs Double Quotes in JSON

In Python programming, strings can be enclosed in either single or double quotes. However, when working with JSON, it's crucial to note that only double quotes are allowed.

Consider the following code snippet:

import simplejson as json

s = "{'username':'dfdsfdsf'}" # Incorrect
j = json.loads(s)

This snippet attempts to load a JSON string into a Python object, but it will fail with a syntax error. This is because the JSON string uses single quotes, which are not allowed in JSON syntax.

According to JSON syntax specifications, all strings must be enclosed in double quotes. Therefore, the correct way to write the above code is:

s = '{"username":"dfdsfdsf"}' # Correct
j = json.loads(s)

By using double quotes in the JSON string, the code will successfully load the JSON data into the Python object.

It's important to remember that JSON and Python string syntax are distinct. While Python allows both single and double quotes for strings, JSON strictly requires double quotes. Failure to adhere to this convention will result in errors when parsing JSON data.

The above is the detailed content of Why Do JSON Strings Require Double Quotes in Python?. For more information, please follow other related articles on the PHP Chinese website!