max_columns == 0 incorrectly wraps around for wide dfs · Issue #7180 · pandas-dev/pandas (original) (raw)

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Description

According to the description of max_columns, should switch to "smaller" (at the beginning to info, nowadays to truncate) view when set to zero instead of wrapping around.

display.max_columns: [default: 20] [currently: 0]
: int
        max_rows and max_columns are used in __repr__() methods to decide if
        to_string() or info() is used to render an object to a string.  In case
        python/IPython is running in a terminal this can be set to 0 and pandas
        will correctly auto-detect the width the terminal and swap to a smaller
        format in case all columns would not fit vertically. The IPython notebook,
        IPython qtconsole, or IDLE do not run in a terminal and hence it is not
        possible to do correct auto-detection.
        'None' value means unlimited.

Originally introduced here #453 (comment)

Fixed after broken here: #2881

Behavior change (broken again) here #5550