FEAT: Add partial support for df.pct_change() [UPSTREAM] (modin-pro…

…ject#21)

* FEAT: Add partial support for df.pct_change()

modin/pandas/base.py

@@ -2065,6 +2065,15 @@ def pct_change(
         """
         Percentage change between the current and a prior element.
         """
+        # Attempting to match pandas error behavior here
+        if not isinstance(periods, int):
+            raise ValueError(f"periods must be an int. got {type(periods)} instead")
+
+        # Attempting to match pandas error behavior here
+        for dtype in self._get_dtypes():
+            if not is_numeric_dtype(dtype):
+                raise TypeError(f"unsupported operand type for /: got {dtype}")
+
         return self.__constructor__(
             query_compiler=self._query_compiler.pct_change(
                 periods=periods,