I want to turn the following for
loop:
n = 10
x0 = 0
values = [x0]
for i in range(n):
x0 = f(x0)
values.append(x0)
into a one liner. I figured I could do something like this:
values = [f(x0) for i in range(n)]
but I need to update the value of x0
in each instance of the loop. Any ideas?
CodePudding user response:
Walrus operator :=
to the rescue:
>>> x0 = 0
>>> def f(x): return x*2 1
...
>>> [x0:=f(x0) for _ in range(10)]
[1, 3, 7, 15, 31, 63, 127, 255, 511, 1023]
>>> x0
1023 # x0 was modified
CodePudding user response:
In addition to walrus, more_itertools
has a function iterate
that does this repeated application:
import more_itertools as mo
mo.take(10, mo.iterate(f, x0))