1 files changed, 17 insertions, 1 deletions
diff --git a/r_qtl/r_qtl2_qc.py b/r_qtl/r_qtl2_qc.py
index 853c34b..70a00f9 100644
--- a/r_qtl/r_qtl2_qc.py
+++ b/r_qtl/r_qtl2_qc.py
@@ -1,7 +1,7 @@
 """Quality control checks for R/qtl2 data bundles."""
 from zipfile import ZipFile
 from functools import reduce
-from typing import Union, Sequence
+from typing import Union, Sequence, Iterator, Optional
 
 from r_qtl import errors as rqe
 from r_qtl import r_qtl2 as rqtl2
@@ -54,3 +54,19 @@ def validate_bundle(zfile: ZipFile):
         raise rqe.MissingFileError(
                         "The following files do not exist in the bundle: " +
                         ", ".join(missing))
+
+def geno_errors(zfile: ZipFile) -> Iterator[tuple[Optional[int], Optional[str], str]]:
+    """Check for and retrieve geno errors."""
+    cdata = rqtl2.control_data(zfile)
+    genotypes = tuple(cdata.get("genotypes", {}).keys())
+    try:
+        for lineno, row in enumerate(
+                rqtl2.file_data(zfile, "geno", cdata), start=1):
+            for field, value in row.items():
+                if field == "id":
+                    continue
+                if value is not None and value not in genotypes:
+                    yield (lineno, field, (
+                        f"Invalid value '{value}'. Expected one of {genotypes}"))
+    except rqe.MissingFileError:
+        yield (None, None, "Missing 'geno' file.")