support Python 3.7

[leofang]

No description provided.

[leofang]

Tested: almost everything works, but it took some efforts:
1. posix_ipc and pyfftw don't have py37 Conda packages yet, have to be pip-installed.
2. numba v0.44 changed the behavior of looking up env variables like NUMBAPRO_NVVM (this is irrelevant of Python version I think, just in case)
3. matplotlib v3.0.3 doesn't seem to behave properly on line plots. The errors aren't plotted at all. Not sure if this is related: every time the start button is clicked, the following warning is always shown:

'c' argument looks like a single numeric RGB or RGBA sequence, which should be avoided as value-mapping will have precedence in case its length matches with 'x' & 'y'. Please use a 2-D array with a single row if you really want to specify the same RGB or RGBA value for all points.

UPDATE -> see #50.

[leofang]

posix_ipc and pyfftw don't have py37 Conda packages yet, have to be pip-installed.

pyfftw now supports py37, see NSLS-II/lightsource2-recipes#681.

[leofang]

If the package is pip-installed, we're good because posix_ipc will be there. But in Conda it's controlled by upstream (in the anaconda channel, which we mirror to our internal "defaults" channel). Report this to Anaconda.

[leofang]

Reported to AnacondaRecipes/aggregate#154, not sure if that is the best place or I should try https://github.com/ContinuumIO/anaconda-issues/issues...

[leofang]

ContinuumIO/anaconda-issues#10993

[leofang]

2. numba v0.44 changed the behavior of looking up env variables like NUMBAPRO_NVVM (this is irrelevant of Python version I think, just in case)

See numba/numba#4164, numba/numba#4165

[leofang]

posix_ipc now has py37 support, see ContinuumIO/anaconda-issues#10993.

[leofang]

2. numba v0.44 changed the behavior of looking up env variables like NUMBAPRO_NVVM (this is irrelevant of Python version I think, just in case)

See numba/numba#4164, numba/numba#4165

This is considered a bug and is fixed in v0.44.1.

[leofang]

The support for py37 for the internal Conda package is added in NSLS-II/lightsource2-recipes#726. Closing this.