Missing install_requires on healpy, ligo.skymap, python-ligo-lw

The package metadata declares the following requirements:

install_requires = [
    "h5py",
    "lalsuite",
    "lscsoft-glue",
    "matplotlib",
    "numpy",
    "scikit-learn",
    "scipy",
    "six",
]

However, by inspecting the various imports, I see the following requirements:

$ git grep -E -h "^(\s+)?(import|from)" | cut -d\  -f2 | sort -u

.
argparse
ast
bisect
collections
.common_cl
copy
datetime
errno
functools
__future__
glob
glue
glue.lal
h5py
healpy
itertools
json
lal
lalframe.frread
lalinference.rapid_pe
lalinspiral
lalmetaio
lal.rate
lal.series
lalsimulation
ligo.lw
ligo.lw.utils
ligo.skymap.io
math
numpy
os
os,ast
rapid_pe
rapid_pe.common_cl
re
scipy
scipy.linalg
scipy.optimize
scipy.special
select
setuptools
six.moves
sklearn.neighbors
socket
sqlite3
stat
sys
time
types
warnings

Most of these are standard library imports, however I think this exposes missing requirements (not protected by any try/except) on the following packages:

• healpy
• ligo.skymap
• python-ligo-lw

Should these all be added to install_requires?