gmpy_cffi doesn't appear to have set_context

[dstromberg]

I have some code working on CPython with gmpy2, using mpfr: https://stromberg.dnsalias.org/svn/pybenoit/trunk

Sadly, when I try to run it on Pypy3 with gmpy_cffi, I get:

Traceback (most recent call last):
  File "./pybenoit", line 227, in <module>
    main()
  File "./pybenoit", line 185, in main
    mp.set_context(mp.context())
AttributeError: module 'gmpy_cffi' has no attribute 'set_context'

Is there a way to set a context with a caller-specified precision, using gmpy_cffi? I tried eliminating the set_context, but then mp.get_context().precision = 100 fails with:

Traceback (most recent call last):
  File "./pybenoit", line 227, in <module>
    main()
  File "./pybenoit", line 186, in main
    mp.get_context().precision = 100
AttributeError: module 'gmpy_cffi' has no attribute 'get_context'

I'm using CPython 3.9,2, Pypy3 7.3.9, and:

$ dpkg -l | egrep -i 'libgmp-dev|libmpfr-dev|libmpc-dev'
below cmd output started 2023 Sun Sep 24 10:08:36 AM PDT
ii  libgmp-dev:amd64                              2:6.2.1+dfsg-1+deb11u1
ii  libmpc-dev:amd64                              1.2.0-1
ii  libmpfr-dev:amd64                             4.1.0-3

Thanks! I'm kind of excited about the potential of gmpy_cffi.