Each element in its input list is at most as big as the one before it

Question:-
Define a Python function "descending(l)" that returns True if each element in its input list is at most as big as the one before it
For instance:
>>> descending([])True
>>> descending([4,4,3])True
>>> descending([19,17,18,7])False

 Answer:-

 def descending(l):
  a=True
  if l==[]:
    return True
  for x in range(0,len(l)-1):
    if l[x]<l[x+1]:
        a=False
        break
     

  return a

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