mirror of
https://github.com/maziggy/bambuddy.git
synced 2026-09-30 11:12:35 +02:00
21 lines
949 B
Python
21 lines
949 B
Python
"""Natural (numeric-aware) string sorting, e.g. "Drybox 2" before "Drybox 10"."""
|
|
|
|
import re
|
|
|
|
_CHUNK_RE = re.compile(r"(\d+)")
|
|
|
|
|
|
def natural_sort_key(value: str) -> tuple:
|
|
"""Sort key that orders embedded numbers by value, not lexicographically.
|
|
|
|
A plain string sort puts "Drybox 10" before "Drybox 2" (character by
|
|
character, "1" < "2"). Splitting into alternating text/digit runs and
|
|
comparing the digit runs as integers instead gets "Drybox 2" before
|
|
"Drybox 10", without assuming every name follows a fixed "prefix N"
|
|
shape. `_CHUNK_RE.split` always yields text chunks at even indices and
|
|
digit chunks at odd indices for any input, so the type at a given index
|
|
is consistent across every key this function produces — two keys can be
|
|
compared without ever hitting a str-vs-int mismatch mid-tuple.
|
|
"""
|
|
return tuple(int(chunk) if chunk.isdigit() else chunk.lower() for chunk in _CHUNK_RE.split(value))
|