check if array is monotonic python
def strictly_increasing(L):
return all(x<y for x, y in zip(L, L[1:]))
def strictly_decreasing(L):
return all(x>y for x, y in zip(L, L[1:]))
def non_increasing(L):
return all(x>=y for x, y in zip(L, L[1:]))
def non_decreasing(L):
return all(x<=y for x, y in zip(L, L[1:]))
def monotonic(L):
return non_increasing(L) or non_decreasing(L)