Fix gcd import (#23)

Fixes #22

.github/workflows/test.yaml

@@ -7,7 +7,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2

setup.py

@@ -36,7 +36,7 @@
         ]
     },
     classifiers=[
-        "Development Status :: 4 - Beta",
+        "Development Status :: 5 - Production/Stable",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: MIT License",
         "Operating System :: OS Independent",
@@ -45,9 +45,11 @@
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Software Development :: Libraries",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],
+    python_requires='>=3.6, <4',
     license="MIT",
     keywords=["docker", "aws", "development", "macos", "linux"],
 )

src/remote_docker_aws/core.py

@@ -7,9 +7,6 @@
 from typing import Dict, List
 
 import boto3
-from sceptre.cli.helpers import setup_logging
-from sceptre.context import SceptreContext
-from sceptre.plan.plan import SceptrePlan
 from unison_gitignore.parser import GitIgnoreToUnisonIgnore
 
 from .config import RemoteDockerConfigProfile
@@ -20,6 +17,7 @@
     PORT_MAP_TYPE,
     SCEPTRE_PATH,
 )
+from .sceptre_compat import setup_logging, SceptreContext, SceptrePlan
 from .util import get_replica_and_sync_paths_for_unison, logger, wait_until_port_is_open
 
 

src/remote_docker_aws/sceptre_compat.py

@@ -0,0 +1,18 @@
+"""
+This is to avoid the fractions.gcd import done in networkx (used by sceptre)
+
+Once this issue is resolved https://github.com/Sceptre/sceptre/issues/942
+we can update sceptre and remove this logic
+"""
+import fractions
+
+try:
+    fractions.gcd
+except AttributeError:
+    from math import gcd
+
+    setattr(fractions, "gcd", gcd)
+
+from sceptre.cli.helpers import setup_logging  # noqa
+from sceptre.context import SceptreContext  # noqa
+from sceptre.plan.plan import SceptrePlan  # noqa