pandas.Series.is_monotonic
- 
Series.is_monotonic - 
Return boolean if values in the object are monotonic_increasing.
New in version 0.19.0.
Returns: - 
is_monotonic : boolean 
 - 
 
    © 2008–2012, AQR Capital Management, LLC, Lambda Foundry, Inc. and PyData Development Team
Licensed under the 3-clause BSD License.
    https://pandas.pydata.org/pandas-docs/version/0.24.2/reference/api/pandas.Series.is_monotonic.html