How i can change function to one line in python

Question

def height (t):
  if not t:
    return 0                                   # (1)
  elif not t.nodes:
    return 1                                   # (2)
  else:
    return 1 + max(height(n) for n in t.nodes) # (3)

hello guys some one can help me and change this function to pipline? using map , filter , lambda

you don't need to write def height you need to use only with lambda map filter (PIPLINE)

Why? Single-line does not equal better, faster or more readable code — DeepSpace, Jan 12 '21 at 19:23
Is `not t` a euphemism for `t is None`, so that future uses of `t.nodes` don't raise an `AttributeError`? — chepner, Jan 12 '21 at 19:27
What do you mean by "pipline"? Why do you expect the use of "map , filter , lambda" – these do not naturally translate to the operations shown in the original code. — MisterMiyagi, Jan 12 '21 at 20:06
Solution based on [this answer](https://stackoverflow.com/a/8703135/984421): `(lambda h: lambda t: h(h, t))(lambda h, t: 0 if not t else 1 if not t.nodes else 1 + max(h(h, n) for n in t.nodes))(t)`. — ekhumoro, Jan 12 '21 at 20:40

Gal Birka · Answer 1 · 2021-01-12T19:27:42.097

1

Since you only return 0 if not t, and for other cases you return 1, you could go with this simple line:

return 0 if not t else 1 if not t.nodes else 1 + max(height(n) for n in t.nodes)

edited Jan 12 '21 at 19:27

answered Jan 12 '21 at 19:25

Gal Birka

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but i need to Recursion – Roni Jack Vituli Jan 12 '21 at 19:26
@GalBirka but i ask for not def you can do it in pipline? – Roni Jack Vituli Jan 12 '21 at 19:37

How i can change function to one line in python

1 Answers1