pandas.MultiIndex.contains
- 
MultiIndex.contains(key)[source]
- 
return a boolean if this key is IN the index Parameters: key : object Returns: 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/0.20.3/generated/pandas.MultiIndex.contains.html