Truncate repr by default rather than changing to info view.

Truncate wide HTML repr rather than changing format.

Truncate HTML repr for DataFrames with MultiIndex-es

Add tests for long & wide Dataframe HTML reprs

Remove now-dead code for info display in HTML repr.

Fix HTML repr of wide tables with named indices

Make plain text repr follow HTML repr, truncating large DataFrames

Fix up tests for string repr

Update docs for DataFrame reprs

Add an option to switch back to info repr for large DataFrames

Author: takluyver

doc/source/dsintro.rst

@@ -573,8 +573,9 @@ indexing semantics are quite different in places from a matrix.
 Console display
 ~~~~~~~~~~~~~~~
 
-For very large DataFrame objects, only a summary will be printed to the console
-(here I am reading a CSV version of the **baseball** dataset from the **plyr**
+Very large DataFrames will be truncated to display them in the console.
+You can also get a summary using :meth:`~pandas.DataFrame.info`.
+(Here I am reading a CSV version of the **baseball** dataset from the **plyr**
 R package):
 
 .. ipython:: python
@@ -587,6 +588,7 @@ R package):
 
    baseball = read_csv('data/baseball.csv')
    print(baseball)
+   baseball.info()
 
 .. ipython:: python
    :suppress:
@@ -622,19 +624,8 @@ option:
 
    reset_option('line_width')
 
-You can also disable this feature via the ``expand_frame_repr`` option:
-
-.. ipython:: python
-
-   set_option('expand_frame_repr', False)
-
-   DataFrame(randn(3, 12))
-
-.. ipython:: python
-   :suppress:
-
-   reset_option('expand_frame_repr')
-
+You can also disable this feature via the ``expand_frame_repr`` option.
+This will print the table in one block.
 
 DataFrame column attribute access and IPython completion
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

doc/source/v0.13.0.txt

@@ -607,6 +607,12 @@ Enhancements
   output datetime objects should be formatted. Datetimes encountered in the
   index, columns, and values will all have this formatting applied. (:issue:`4313`)
 - ``DataFrame.plot`` will scatter plot x versus y by passing ``kind='scatter'`` (:issue:`2215`)
+- The HTML and plain text representations of :class:`DataFrame` now show
+  a truncated view of the table once it exceeds a certain size, rather
+  than switching to the short info view (:issue:`4886`, :issue:`5550`).
+  This makes the representation more consistent as small DataFrames get
+  larger. To get the info view, call :meth:`DataFrame.info`, or restore
+  the old behaviour with ``set_option('display.large_repr', 'info')``.
 
 .. _whatsnew_0130.experimental:
 

pandas/core/config_init.py

@@ -166,13 +166,19 @@
 
 pc_max_info_rows_doc = """
 : int or None
-    max_info_rows is the maximum number of rows for which a frame will
-    perform a null check on its columns when repr'ing To a console.
-    The default is 1,000,000 rows. So, if a DataFrame has more
-    1,000,000 rows there will be no null check performed on the
-    columns and thus the representation will take much less time to
-    display in an interactive session. A value of None means always
-    perform a null check when repr'ing.
+    Deprecated.
+"""
+
+pc_max_info_rows_deprecation_warning = """\
+max_info_rows has been deprecated, as reprs no longer use the info view.
+"""
+
+pc_large_repr_doc = """
+: 'truncate'/'info'
+
+    For DataFrames exceeding max_rows/max_cols, the repr (and HTML repr) can
+    show a truncated table (the default from 0.13), or switch to the view from
+    df.info() (the behaviour in earlier versions of pandas).
 """
 
 pc_mpl_style_doc = """
@@ -220,6 +226,8 @@ def mpl_style_cb(key):
     cf.register_option('max_colwidth', 50, max_colwidth_doc, validator=is_int)
     cf.register_option('max_columns', 20, pc_max_cols_doc,
                        validator=is_instance_factory([type(None), int]))
+    cf.register_option('large_repr', 'truncate', pc_large_repr_doc,
+                       validator=is_one_of_factory(['truncate', 'info']))
     cf.register_option('max_info_columns', 100, pc_max_info_cols_doc,
                        validator=is_int)
     cf.register_option('colheader_justify', 'right', colheader_justify_doc,
@@ -258,6 +266,9 @@ def mpl_style_cb(key):
                     msg=pc_height_deprecation_warning,
                     rkey='display.max_rows')
 
+cf.deprecate_option('display.max_info_rows',
+                    msg=pc_max_info_rows_deprecation_warning)
+
 tc_sim_interactive_doc = """
 : boolean
     Whether to simulate interactive mode for purposes of testing