Python | Pandas Index.is_monotonic_decreasing

Last Updated : 20 Feb, 2019
Pandas Index is an immutable ndarray implementing an ordered, sliceable set. It is the basic object which stores the axis labels for all pandas objects. Pandas Index.is_monotonic_decreasing attribute return True if the underlying data in the given Index object is monotonically decreasing else it return False.
Syntax: Index.is_monotonic_decreasing Parameter : None Returns : boolean
Example #1: Use Index.is_monotonic_decreasing attribute to find out if the underlying data in the given Index object is monotonically decreasing or not. Python3
# importing pandas as pd
import pandas as pd

# Creating the index
idx = pd.Index([900, 700, 620, 388, 24])

# Print the index
print(idx)
Output : Now we will use Index.is_monotonic_decreasing attribute to find out if the underlying data in the given Index object is monotonically decreasing or not. Python3 1==
# check if the values in the Index
# are monotonically decreasing 
result = idx.is_monotonic_decreasing

# Print the result
print(result)
Output : As we can see in the output, the Index.is_monotonic_decreasing attribute has returned True indicating that the underlying data of the given Index object is monotonically decreasing.   Example #2 : Use Index.is_monotonic_decreasing attribute to find out if the underlying data in the given Index object is monotonically decreasing or not. Python3
# importing pandas as pd
import pandas as pd

# Creating the index
idx = pd.Index(['2012-12-12', None, '2002-1-10', None])

# Print the index
print(idx)
Output : Now we will use Index.is_monotonic_decreasing attribute to find out if the underlying data in the given Index object is monotonically decreasing or not. Python3 1==
# check if the values in the Index
# are monotonically decreasing 
result = idx.is_monotonic_decreasing

# Print the result
print(result)
Output : As we can see in the output, the Index.is_monotonic_decreasing attribute has returned False indicating that the underlying data of the given Index object is not monotonically decreasing.
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