add 'alias' command for querying and setting the alias (#126)

* add 'alias' command for querying and setting the alias

* calculate coverage only on library files, e.g., ignoring cli and test files

* remove py34 and add py37

* readd py33, remove it from travis as it seems to be a travis limitation only

* use xenial dist for travis, regular does not support py37..

.travis.yml

@@ -1,7 +1,7 @@
 sudo: false
 language: python
+dist: xenial
 python:
-  - "3.3"
   - "3.4"
   - "3.5"
   - "3.6"

pyHS100/cli.py

@@ -111,6 +111,18 @@ def state(ctx, dev):
     ctx.invoke(emeter)
 
 
+@cli.command()
+@pass_dev
+@click.argument('new_alias', required=False, default=None)
+def alias(dev, new_alias):
+    """Get or set the device alias."""
+    if new_alias is not None:
+        click.echo("Setting alias to %s" % new_alias)
+        dev.alias = new_alias
+
+    click.echo("Alias: %s" % dev.alias)
+
+
 @cli.command()
 @pass_dev
 @click.option('--year', type=Datetime(format='%Y'),

tox.ini

@@ -1,13 +1,13 @@
 [tox]
-envlist=py33,py34,py35,py36,flake8
+envlist=py33,py34,py35,py36,py37,flake8
 skip_missing_interpreters = True
 
 [tox:travis]
-2.7 = py27
+3.3 = py33
-3.3 = py34
 3.4 = py34
 3.5 = py35
 3.6 = py36
+3.7 = py37
 
 [testenv]
 passenv = TRAVIS TRAVIS_JOB_ID TRAVIS_BRANCH
@@ -17,7 +17,7 @@ deps=
   voluptuous
   typing
 commands=
-    py.test --cov pyHS100
+    py.test --cov --cov-config=tox.ini pyHS100
 
 [testenv:flake8]
 deps=flake8
@@ -29,3 +29,10 @@ commands=mypy --silent-imports pyHS100
 
 [flake8]
 exclude = .git,.tox,__pycache__,pyHS100/tests/fakes.py
+
+[coverage:run]
+source = pyHS100
+branch = True
+omit =
+  pyHS100/cli.py
+  pyHS100/tests/*