Too many things marked Final in #235

[fastcat]

While the typing fixes in #235 make consuming this library nicer, marking all the top level CONSTANTS as final means that any code consuming this and using mypy "can't" modify them any more, which is especially notable for HEADER_FORMAT that is explicitly marked as safe for monkey patching.

Some other fields such as Mesh.name also feel odd to be marked Final, but are less frustrating since there are workarounds beyond just disabling the mypy check for that line.

[wolph]

Good catch — you're right, most of these shouldn't have been Final. Fixed in PR #237 (commit 98b2bbd):

No longer Final:

• HEADER_FORMAT, BUFFER_SIZE, HEADER_SIZE, COUNT_SIZE, MAX_COUNT — module-level constants that users may legitimately want to override
• AREA_SIZE_THRESHOLD, VECTORS, DIMENSIONS — configurable constants
• AUTOMATIC, ASCII, BINARY, X, Y, Z — backwards-compat aliases
• Mesh.name, Mesh.data — instance attributes that users may reassign

Still Final:

• Mesh.speedups — set once at construction, changing it mid-lifecycle would be a bug
• __about__ metadata fields — package identity, never modified at runtime