mellow_walk
-----------

>>> from mellow_walk import mellow_walk

>>> L     = [ 6, -2,  2,  4,  3, -4,  1, -5]
>>> signL = [-1,  0,  1, -1,  0, -1,  1,  0]

>>> mellow_walk(L, signL, 1)   # doctesttag: +TAG=1_mellow_walk
([1, -2, -1, -5], -9)


>>> mellow_walk(L, signL, 0)   # doctesttag: +TAG=1_mellow_walk
([0, -6, -4, 3, -1, -5], -9)

>>> mellow_walk(L, signL, 2)   # doctesttag: +TAG=1_mellow_walk
([2, 4, 3, -1, -5], -9)

mellow_walk(L, signL, 3)   # doctesttag: +TAG=1_mellow_walk
([3, -1, -5], -9)

>>> mellow_walk(L, signL, 4)   # doctesttag: +TAG=1_mellow_walk
([4, 3, -1, -5], -9)

>>> mellow_walk(L, signL, 5)   # doctesttag: +TAG=1_mellow_walk
([5], 9)

>>> mellow_walk(L, signL, 7)   # doctesttag: +TAG=1_mellow_walk
([7, -5], -9)

>>> mellow_walk(L, signL, 8)   # doctesttag: +TAG=1_mellow_walk
([], 8)

>>> mellow_walk(L, signL, -9)   # doctesttag: +TAG=1_mellow_walk
([], -9)

>>> mellow_walk([], [], 0)   # doctesttag: +TAG=1_mellow_walk
([], 0)



gseries_alt
-----------

>>> from gseries_alt import gseries_alt

>>> eps = 0.000001

>>> r = gseries_alt(1, -0.5, eps)
>>> r == (1.3333, -0.6667)        # doctesttag: +TAG=2_gseries_alt
True

>>> r = gseries_alt(1, -0.2, eps)
>>> r == (1.0417, -0.2083)         # doctesttag: +TAG=2_gseries_alt
True

>>> r = gseries_alt(1, -1/3, eps)
>>> r == (1.125, -0.375)           # doctesttag: +TAG=2_gseries_alt
True

>>> r = gseries_alt(3, -0.5, eps)
>>> r == (4.0, -2.0)              # doctesttag: +TAG=2_gseries_alt
True

>>> r = gseries_alt(-1.0, -0.33, eps)
>>> r == (0.3703, -1.1222)        # doctesttag: +TAG=2_gseries_alt
True

>>> r = gseries_alt(1, -0.1, eps)
>>> r == (1.0101, -0.101)         # doctesttag: +TAG=2_gseries_alt
True

>>> r = gseries_alt(1, 0, eps)
>>> r == (1, 0.0)         # doctesttag: +TAG=2_gseries_alt
True