Merge branch 'pymc3version' into 'master'

Update sampler_requirements.txt: PyMC3 v3.7 is Python 3 compatible only, so change the requirements See merge request !582

Merge branch 'pymc3version' into 'master'
169d8f41 · Gregory Ashton · 16364c7c · cdb9de4c · 169d8f41
Commit 169d8f41 authored 5 years ago by Gregory Ashton
--- a/sampler_requirements.txt
+++ b/sampler_requirements.txt
@@ -3,5 +3,6 @@ dynesty
 emcee
 nestle
 ptemcee
-pymc3>=3.6
+pymc3==3.6; python_version <= '2.7'
+pymc3>=3.6; python_version > '3.4'
 pymultinest
\ No newline at end of file