Initial commit

lyrics_dl/utils.py

@@ -0,0 +1,14 @@
+from typing import Iterator, Optional, TypeVar
+
+
+def threshold_equal(a: float, b: float, epsilon: float) -> bool:
+    return abs(a - b) <= epsilon
+
+
+T = TypeVar('T')
+
+def next_or_none(iterator: Iterator[T]) -> Optional[T]:
+    try:
+        return next(iterator)
+    except StopIteration:
+        return None