Added verification for strings that contain digits and a starting or ending 'e' (#673)

Author: HubertPalo

CHANGELOG.rst

@@ -31,6 +31,8 @@ Fixed
   <https://github.com/omni-us/jsonargparse/pull/668>`__)
 - Functions that create types now have ``TypeAlias`` return type to avoid mypy
   errors (`#671 <https://github.com/omni-us/jsonargparse/pull/671>`__).
+- Bug when parsing strings with digits and a starting or ending 'e' (`#672
+  <https://github.com/omni-us/jsonargparse/pull/673>`__).
 
 
 v4.36.0 (2025-01-17)

jsonargparse/_loaders_dumpers.py

@@ -30,7 +30,12 @@ def load_basic(value):
         return None
     if value.isdigit() or (value.startswith("-") and value[1:].isdigit()):
         return int(value)
-    if value.replace(".", "", 1).replace("e", "", 1).replace("-", "", 2).isdigit() and ("e" in value or "." in value):
+    if (
+        not value.startswith("e")
+        and not value.endswith("e")
+        and value.replace(".", "", 1).replace("e", "", 1).replace("-", "", 2).isdigit()
+        and ("e" in value or "." in value)
+    ):
         return float(value)
     return not_loaded
 

jsonargparse_tests/test_loaders_dumpers.py

@@ -91,6 +91,12 @@ def test_dump_header_invalid(parser):
         parser.dump_header = True
 
 
+def test_load_value_digits_and_e():
+    with parser_context(load_value_mode="yaml"):
+        assert "e123" == load_value("e123")
+        assert "123e" == load_value("123e")
+
+
 @skip_if_no_pyyaml
 def test_load_value_dash():
     with parser_context(load_value_mode="yaml"):