chore: loosen cramjam version constraint to >=2.5.0 (#1145)

pyproject.toml

@@ -38,7 +38,7 @@ classifiers = [
 ]
 dependencies = [
   "awkward>=2.4.6",
-  "cramjam>=2.8.1",
+  "cramjam>=2.5.0",
   "importlib-metadata;python_version<\"3.8\"",
   "numpy",
   "fsspec",

src/uproot/compression.py

@@ -179,9 +179,9 @@ def decompress(self, data: bytes, uncompressed_bytes=None) -> bytes:
             getattr(cramjam, "experimental", None), "lzma", None
         )
         if lzma is None:
-            raise RuntimeError(
-                "lzma not found in the cramjam package! (requires cramjam >= 2.8.1)"
-            )
+            import lzma
+
+            return lzma.decompress(data)
         if uncompressed_bytes is None:
             raise ValueError(
                 "lzma decompression requires the number of uncompressed bytes"
@@ -226,9 +226,7 @@ def compress(self, data: bytes) -> bytes:
             getattr(cramjam, "experimental", None), "lzma", None
         )
         if lzma is None:
-            raise RuntimeError(
-                "lzma not found in the cramjam package! (requires cramjam >= 2.8.1)"
-            )
+            import lzma
         return lzma.compress(data, preset=self._level)