I disagree: your style is less readable than Black's. You've moved the data-structure syntax away from the data, and toward the function-call syntax, causing th

I disagree: your style is less readable than Black's. You've moved the data-structure syntax away from the data, and toward the function-call syntax, causing them to blend together. This would be more readable -- put the space around the structure, not inside it: my_function_call( [1, 2, 3] ) Now we can clearly see the separation of the argument from the function call. But I wouldn't bother switching code formatters just to have this.