| | 1 | from setuptools.extern.more_itertools import consume # noqa: F401 |
| | 2 | |
| | 3 | |
| | 4 | # copied from jaraco.itertools 6.1 |
| | 5 | def ensure_unique(iterable, key=lambda x: x): |
| | 6 | """ |
| | 7 | Wrap an iterable to raise a ValueError if non-unique values are encountered. |
| | 8 | |
| | 9 | >>> list(ensure_unique('abc')) |
| | 10 | ['a', 'b', 'c'] |
| | 11 | >>> consume(ensure_unique('abca')) |
| | 12 | Traceback (most recent call last): |
| | 13 | ... |
| | 14 | ValueError: Duplicate element 'a' encountered. |
| | 15 | """ |
| | 16 | seen = set() |
| | 17 | seen_add = seen.add |
| | 18 | for element in iterable: |
| | 19 | k = key(element) |
| | 20 | if k in seen: |
| | 21 | raise ValueError(f"Duplicate element {element!r} encountered.") |
| | 22 | seen_add(k) |
| | 23 | yield element |
projects / config.git / blame_incremental