actuary77 wrote:
I am trying to write simple recursive function to build a list:
def rec(n,alist=[]):
_nl=alist[:]
print n,_nl
if n == 0:
print n,_nl
return _nl
else:
_nl=_nl+[n]
rec(n-1,_nl)
should be
return rec(n-1,_nl)
>>> def rec(n,alist=[]):
... _nl=alist[:]
... print n,_nl
... if n == 0:
... print n,_nl
... return _nl
... else:
... _nl=_nl+[n]
... return rec(n-1,_nl)
...
>>> _nl = rec(4)
4 []
3 [4]
2 [4, 3]
1 [4, 3, 2]
0 [4, 3, 2, 1]
0 [4, 3, 2, 1]
>>> print _nl
[4, 3, 2, 1]
Kent
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