raise TypeError when Series dtype is object on calling Series.round()

Author: KevsterAmp

pandas/core/series.py

@@ -2814,6 +2814,8 @@ def round(self, decimals: int = 0, *args, **kwargs) -> Series:
         dtype: float64
         """
         nv.validate_round(args, kwargs)
+        if self._mgr.dtype == "object":
+            raise TypeError("Expected numeric dtype, got object instead.")
         new_mgr = self._mgr.round(decimals=decimals, using_cow=using_copy_on_write())
         return self._constructor_from_mgr(new_mgr, axes=new_mgr.axes).__finalize__(
             self, method="round"