Landsat metadata file error

[KimBerry]

There are two errors that I could use some help with. The first relates to the pathname

meta_path = r'D:\Daryl_Ann_Winstead\ACL_MSFC\Spring2016\LakeVic\Data\Landsat\LC81700602016022LGN00\LC81700602016022LGN00_MTL.txt'

The other error relates to dnppy/dnppy/landsat/surface_reflectance.py

for k in xrange(6):
if outdir:
outdir = os.path.abspath(outdir)
asr_path = "{0}{1}".format(outdir, out_list[k])
else:
asr_path = "{0}{1}".format(toa_folder, out_list[k])
refl_surf = (toa_list[k] - pr_bands[k])/(entisr_bands[k] * entsrrs_bands[k])

in the dnppy code? Would updating dnppy correct the issue?