enable_FEATURE[=ARG] is not working

[kmo]

env:

• CentOS 7
• Python 2.7.5/pip 8.1.2
• hpccm 20.2.0
• install by sudo pip install hpccm

script:

import hpccm

# Use appropriate container base images based on the CPU architecture
arch = 'x86_64'
default_build_image = 'nvidia/cuda:10.1-devel-ubuntu18.04'
default_runtime_image = 'nvidia/cuda:10.1-base-ubuntu18.04'

########
# Build stage (Stage 0)
########

# Base image
Stage0 += baseimage(image=USERARG.get('build_image', default_build_image),
                    _arch=arch, _as='build')

Stage0 += ucx(
              enable_devel-headers=True,
              gdrcopy='/usr/local/gdrcopy',
              knem='/usr/local/knem',
              without_java=True,
              ofed=True,
              ldconfig=True,
              version='1.7.0',
             )

cmd:

hpccm --recipe test.py --format singularity --singularity-version=3.2 > test.def

msg:

ERROR: keyword can't be an expression (test.py, line 17)

other blocks package have same issue with enable_FEATURE

[Scott McMillan]

Please change the line enable_devel-headers=True, to enable_devel_headers=True, (note the change of a dash to an underscore).

[kmo]

@samcmill
Many thanks for the prompt reply !
I misunderstood the enable_FEATURE option.
And HPCCM is a very powerful tool, Thanks !