Initial data commit

Task/Abbreviations-automatic/Python/abbreviations-automatic-2.py

@@ -0,0 +1,54 @@
+import operator
+from itertools import (accumulate,
+                       repeat)
+from pathlib import Path
+from typing import (Iterator,
+                    List,
+                    Tuple)
+
+
+FILEPATH = Path('days_of_week.txt')
+
+
+def read_lines(path: Path) -> Iterator[str]:
+    with path.open() as file:
+        yield from file
+
+
+def cumulative_letters(word: str) -> Iterator[str]:
+    """For a word 'foo' yields 'f', 'fo', 'foo', 'foo', 'foo', ..."""
+    yield from accumulate(word, operator.add)
+    yield from repeat(word)
+
+
+def words_cumulative_letters(words: List[str]) -> Iterator[Tuple[str, ...]]:
+    """Yields cumulative letters for several words at the same time"""
+    yield from zip(*map(cumulative_letters, words))
+
+
+def longest_string_length(strings: Tuple[str, ...]) -> int:
+    return max(map(len, strings))
+
+
+def min_abbreviation_length(words: List[str]) -> int:
+    def are_unique(abbreviations: Tuple[str, ...]) -> bool:
+        return len(set(abbreviations)) == len(words)
+
+    unique_abbreviations = filter(are_unique, words_cumulative_letters(words))
+
+    return longest_string_length(next(unique_abbreviations))
+
+
+def main():
+    for line in read_lines(FILEPATH):
+        words = line.split()
+        if not words:
+            print()
+            continue
+
+        count = min_abbreviation_length(words)
+        print(f'{count} {line}', end='')
+
+
+if __name__ == '__main__':
+    main()