Collect methods in generic/frame/series (pandas-dev#23973)

Author: jbrockmendel

pandas/core/frame.py

@@ -369,6 +369,9 @@ def _constructor_expanddim(self):
         from pandas.core.panel import Panel
         return Panel
 
+    # ----------------------------------------------------------------------
+    # Constructors
+
     def __init__(self, data=None, index=None, columns=None, dtype=None,
                  copy=False):
         if data is None:
@@ -575,6 +578,8 @@ def _get_axes(N, K, index=index, columns=columns):
 
         return create_block_manager_from_blocks([values], [columns, index])
 
+    # ----------------------------------------------------------------------
+
     @property
     def axes(self):
         """
@@ -643,6 +648,9 @@ def _is_homogeneous_type(self):
         else:
             return not self._data.is_mixed_type
 
+    # ----------------------------------------------------------------------
+    # Rendering Methods
+
     def _repr_fits_vertical_(self):
         """
         Check length against max_rows.
@@ -770,6 +778,57 @@ def _repr_html_(self):
         else:
             return None
 
+    @Substitution(header='Write out the column names. If a list of strings '
+                         'is given, it is assumed to be aliases for the '
+                         'column names')
+    @Substitution(shared_params=fmt.common_docstring,
+                  returns=fmt.return_docstring)
+    def to_string(self, buf=None, columns=None, col_space=None, header=True,
+                  index=True, na_rep='NaN', formatters=None, float_format=None,
+                  sparsify=None, index_names=True, justify=None,
+                  max_rows=None, max_cols=None, show_dimensions=False,
+                  decimal='.', line_width=None):
+        """
+        Render a DataFrame to a console-friendly tabular output.
+        %(shared_params)s
+        line_width : int, optional
+            Width to wrap a line in characters.
+        %(returns)s
+        See Also
+        --------
+        to_html : Convert DataFrame to HTML.
+
+        Examples
+        --------
+        >>> d = {'col1': [1, 2, 3], 'col2': [4, 5, 6]}
+        >>> df = pd.DataFrame(d)
+        >>> print(df.to_string())
+           col1  col2
+        0     1     4
+        1     2     5
+        2     3     6
+        """
+
+        formatter = fmt.DataFrameFormatter(self, buf=buf, columns=columns,
+                                           col_space=col_space, na_rep=na_rep,
+                                           formatters=formatters,
+                                           float_format=float_format,
+                                           sparsify=sparsify, justify=justify,
+                                           index_names=index_names,
+                                           header=header, index=index,
+                                           max_rows=max_rows,
+                                           max_cols=max_cols,
+                                           show_dimensions=show_dimensions,
+                                           decimal=decimal,
+                                           line_width=line_width)
+        formatter.to_string()
+
+        if buf is None:
+            result = formatter.buf.getvalue()
+            return result
+
+    # ----------------------------------------------------------------------
+
     @property
     def style(self):
         """
@@ -2051,55 +2110,6 @@ def to_parquet(self, fname, engine='auto', compression='snappy',
                    compression=compression, index=index,
                    partition_cols=partition_cols, **kwargs)
 
-    @Substitution(header='Write out the column names. If a list of strings '
-                         'is given, it is assumed to be aliases for the '
-                         'column names')
-    @Substitution(shared_params=fmt.common_docstring,
-                  returns=fmt.return_docstring)
-    def to_string(self, buf=None, columns=None, col_space=None, header=True,
-                  index=True, na_rep='NaN', formatters=None, float_format=None,
-                  sparsify=None, index_names=True, justify=None,
-                  max_rows=None, max_cols=None, show_dimensions=False,
-                  decimal='.', line_width=None):
-        """
-        Render a DataFrame to a console-friendly tabular output.
-        %(shared_params)s
-        line_width : int, optional
-            Width to wrap a line in characters.
-        %(returns)s
-        See Also
-        --------
-        to_html : Convert DataFrame to HTML.
-
-        Examples
-        --------
-        >>> d = {'col1': [1, 2, 3], 'col2': [4, 5, 6]}
-        >>> df = pd.DataFrame(d)
-        >>> print(df.to_string())
-           col1  col2
-        0     1     4
-        1     2     5
-        2     3     6
-        """
-
-        formatter = fmt.DataFrameFormatter(self, buf=buf, columns=columns,
-                                           col_space=col_space, na_rep=na_rep,
-                                           formatters=formatters,
-                                           float_format=float_format,
-                                           sparsify=sparsify, justify=justify,
-                                           index_names=index_names,
-                                           header=header, index=index,
-                                           max_rows=max_rows,
-                                           max_cols=max_cols,
-                                           show_dimensions=show_dimensions,
-                                           decimal=decimal,
-                                           line_width=line_width)
-        formatter.to_string()
-
-        if buf is None:
-            result = formatter.buf.getvalue()
-            return result
-
     @Substitution(header='Whether to print column labels, default True')
     @Substitution(shared_params=fmt.common_docstring,
                   returns=fmt.return_docstring)
@@ -2158,6 +2168,8 @@ def to_html(self, buf=None, columns=None, col_space=None, header=True,
         if buf is None:
             return formatter.buf.getvalue()
 
+    # ----------------------------------------------------------------------
+
     def info(self, verbose=None, buf=None, max_cols=None, memory_usage=None,
              null_counts=None):
         """