1 files changed, 13 insertions, 0 deletions
diff --git a/quality_control/file_utils.py b/quality_control/file_utils.py
new file mode 100644
index 0000000..fdce1e1
--- /dev/null
+++ b/quality_control/file_utils.py
@@ -0,0 +1,13 @@
+"Common file utilities"
+from typing import Union
+from pathlib import Path
+from io import TextIOWrapper
+from zipfile import ZipFile, is_zipfile
+
+def open_file(filepath: Union[str, Path]) -> Union[ZipFile, TextIOWrapper]:
+    "Transparently open both TSV and ZIP files"
+    if not is_zipfile(filepath):
+        return open(filepath, encoding="utf-8")
+
+    with ZipFile(filepath, "r") as zfile:
+        return zfile.open(zfile.infolist()[0], "r")