REF: extract params used in DataFrame.__repr__ (#43987)

Author: topper-123

pandas/core/frame.py

@@ -994,24 +994,8 @@ def __repr__(self) -> str:
             self.info(buf=buf)
             return buf.getvalue()
 
-        max_rows = get_option("display.max_rows")
-        min_rows = get_option("display.min_rows")
-        max_cols = get_option("display.max_columns")
-        max_colwidth = get_option("display.max_colwidth")
-        show_dimensions = get_option("display.show_dimensions")
-        if get_option("display.expand_frame_repr"):
-            width, _ = console.get_console_size()
-        else:
-            width = None
-        self.to_string(
-            buf=buf,
-            max_rows=max_rows,
-            min_rows=min_rows,
-            max_cols=max_cols,
-            line_width=width,
-            max_colwidth=max_colwidth,
-            show_dimensions=show_dimensions,
-        )
+        repr_params = fmt.get_dataframe_repr_params()
+        self.to_string(buf=buf, **repr_params)
 
         return buf.getvalue()
 

pandas/io/formats/format.py

@@ -483,6 +483,37 @@ def get_adjustment() -> TextAdjustment:
         return TextAdjustment()
 
 
+def get_dataframe_repr_params() -> dict[str, Any]:
+    """Get the parameters used to repr(dataFrame) calls using DataFrame.to_string.
+
+    Supplying these parameters to DataFrame.to_string is equivalent to calling
+    ``repr(DataFrame)``. This is useful if you want to adjust the repr output.
+
+    Example
+    -------
+    >>> import pandas as pd
+    >>>
+    >>> df = pd.DataFrame([[1, 2], [3, 4]])
+    >>> repr_params = pd.io.formats.format.get_dataframe_repr_params()
+    >>> repr(df) == df.to_string(**repr_params)
+    True
+    """
+    from pandas.io.formats import console
+
+    if get_option("display.expand_frame_repr"):
+        line_width, _ = console.get_console_size()
+    else:
+        line_width = None
+    return {
+        "max_rows": get_option("display.max_rows"),
+        "min_rows": get_option("display.min_rows"),
+        "max_cols": get_option("display.max_columns"),
+        "max_colwidth": get_option("display.max_colwidth"),
+        "show_dimensions": get_option("display.show_dimensions"),
+        "line_width": line_width,
+    }
+
+
 class DataFrameFormatter:
     """Class for processing dataframe formatting options and data."""