Pythonic way to check if a list is sorted or not

Programmer Question

Is there a pythonic way to check if a list is already sorted in AESC or DESC.

listTs=[1,2,3,5,6,7]

something like listTs.isSorted() that returns True or False.

EDIT: I want to input a list of timestamps for some messages and check if the the transactions appeared in the correct order.

and I can write a custom function too :) , Thanks

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