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src/pytest_regressions/common.py

@@ -197,22 +197,28 @@ def make_location_message(banner: str, filename: Path, aux_files: List[str]) ->
 T = TypeVar("T", bound=Union[MutableSequence, MutableMapping])
 
 
-def round_digits(data: T, precision: int) -> T:
+def round_digits(data: T, digits: int) -> T:
     """
-    Recursively Round the values of any float value in a collection to the given precision.
-
-    :param data: The collection to round.
-    :param precision: The number of decimal places to round to.
-    :return: The collection with all float values rounded to the given precision.
-
+    Recursively round the values of any float value in a collection to the given number of digits. The rounding is done in-place.
+
+    :param data: 
+        The collection to round.
+
+    :param digits: 
+        The number of digits to round to.
+    
+    :return: 
+        The collection with all float values rounded to the given precision.
+        Note that the rounding is done in-place, so this return value only exists
+        because we use the function recursively.
     """
-    # change the generator depending on the collection type
+    # Change the generator depending on the collection type.
     generator = enumerate(data) if isinstance(data, MutableSequence) else data.items()
     for k, v in generator:
         if isinstance(v, (MutableSequence, MutableMapping)):
-            data[k] = round_digits(v, precision)
+            data[k] = round_digits(v, digits)
         elif isinstance(v, float):
-            data[k] = round(v, precision)
+            data[k] = round(v, digits)
         else:
             data[k] = v
     return data

src/pytest_regressions/data_regression.py

@@ -33,7 +33,7 @@ def check(
         data_dict: Dict[str, Any],
         basename: Optional[str] = None,
         fullpath: Optional["os.PathLike[str]"] = None,
-        precision: Optional[int] = None,
+        round_digits: Optional[int] = None,
     ) -> None:
         """
         Checks the given dict against a previously recorded version, or generate a new file.
@@ -48,14 +48,15 @@ def check(
             will ignore ``datadir`` fixture when reading *expected* files but will still use it to
             write *obtained* files. Useful if a reference file is located in the session data dir for example.
 
-        :param precision: if given, round all floats in the dict to the given number of digits.
+        :param round_digits: 
+            If given, round all floats in the dict to the given number of digits.
 
         ``basename`` and ``fullpath`` are exclusive.
         """
         __tracebackhide__ = True
 
-        if precision is not None:
-            round_digits(data_dict, precision)
+        if round_digits is not None:
+            round_digits(data_dict, round_digits)
 
         def dump(filename: Path) -> None:
             """Dump dict contents to the given filename"""