Re:Introduction to Object Oriented Programming in Python
by cgopalan on Wednesday October 24, 2018 @12:02PM
(#18293611)
Indeed comprehensions are part of many functional languages like Haskell, Ocaml, Clojure.
Re:Introduction to Object Oriented Programming in Python
by vram22 on Wednesday October 24, 2018 @12:15PM
(#18293750)
Good to know, thanks. In fact, now I think I remember reading that Python got the idea of comprehensions from Haskell.
Re:Introduction to Object Oriented Programming in Python
by ilovecaching on Wednesday October 24, 2018 @03:52PM
(#18295776)
Comprehensions are a key part of functional programming in Python. Python lambdas are fairly awkward to use. Comprehensions provide a better syntax for transforming data in many cases.
Re:Introduction to Object Oriented Programming in Python
by vram22 on Friday October 26, 2018 @07:51AM
(#18308388)
Yes, lambas don't allow statements in them, only an expression.
In [8]: f = lambda x: x * 2
In [9]: f(2)
Out[9]: 4
In [10]: g = lambda x: if x % 2 == 0: x * 2 else x * 3
File "<ipython-input-10-f7248669b8fd>", line 1
g = lambda x: if x % 2 == 0: x * 2 else x * 3
^
>>> def odd(n): return n % 2 == 1
...
>>> [ i if odd(i) else -i for i in range(1, 11) ]
[1, -2, 3, -4, 5, -6, 7, -8, 9, -10]