Merge pull request #308 from scikit-hep/xxhash-fix

Fixed xxhash import error
scikit-hep · Jul 30, 2019 · b67b57c · b67b57c
2 parents f03ced4 + 6462bd2
commit b67b57c
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/uproot/source/compressed.py b/uproot/source/compressed.py
@@ -8,7 +8,6 @@
 from copy import copy
 
 import numpy
-import xxhash
 
 import uproot.const
 import uproot.source.source
@@ -129,6 +128,10 @@ def _prepare(self):
                 elif algo == b"XZ":
                     compression = self.compression.copy(uproot.const.kLZMA)
                 elif algo == b"L4":
+                    try:
+                        import xxhash
+                    except ImportError:
+                        raise ImportError("Install xxhash package with:\n    pip install xxhash\nor\n    conda install -c conda-forge python-xxhash")
                     compression = self.compression.copy(uproot.const.kLZ4)
                     compressedbytes -= 8
                     checksum = cursor.field(self._compressed, self._format_field0)