Black defaults to a maximum line length of 88 characters.

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Location PART 1 - TONS OF PUNKS, ONE BIG JERK CHAPTER 4: KEYSTROKES AND BRUSHSTROKES Taste, Wars, and Hierarchy of Values

"Black defaults to a maximum line length of 88 characters."

Black's official style documentation sets 88 characters as the default line length, making 88 a tool convention rather than an objectively perfect value.

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Source title The Black code style

Source authors Black

Source year 2026

Confidence high

Importance low