Python: space before and after operators like =, +, -, etc

Question

Following the PEP 8 rules for Python, you should use spaces before and after operators, for example, x = 1 + 2. I follow this convention, and I don't like it without spaces.

Currently, I'm working on a Django project, and I want to include an HTML document with a keyword.

> {% include "pagination.html" with page = shares %}

If i run it as written above I get a keyword error:

"with" in 'include' tag needs at least one keyword argument.

Without the spaces before and after the = it works without problems. Is that the only way, or is there another way?

Answer 1

There are some cases in which you should not use spaces, like when setting default values to function parameters, or when passing kwargs (keyword arguments), like in your case.

See: https://peps.python.org/pep-0008/#whitespace-in-expressions-and-statements

Answer 2

No, you have to remove spaces before and after = operator because, it you add space between argument name & = & argument value, interpreter can't differentiate the arguments, it gets the argument name but don't find the value.

so you have to remove the spaces after and before operator = , to let interpreter know it is the argument provided.

Answer 3

As noted, this is Django template language not real Python, so Python style rules do not apply.

However, I would argue that page=shares in

{% include "pagination.html" with page=shares %}

is a named parameter binding rather than an assignment. As such, it is consistent with this Python:

self.someMethod(1, 2, someFlag=True)

PEP style rules say that there should NOT be spaces around the = in a parameter binding. It is not an operator in that context.

But either way, the template language is what it is. Take it or leave it.

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Is that the only way or is there an other way?

AFAIK, it is the only way. (And the right way, IMO.)