Support for Python 3 (#702)

* Support for Python 3

* Add later Python releases

* Remove Python 3.6

* Re-enable Python 2.7

* Remove platformio-core zip archive

* Re-enable Python 2.7

* Fixes for python 3

Co-Authored-By: C W <fake-name@users.noreply.github.com>

.travis.yml

@@ -1,6 +1,6 @@
 sudo: false
 language: python
-python: '2.7'
+python: '3.5'
 install: script/setup
 cache:
   directories:
@@ -9,8 +9,8 @@ cache:
 matrix:
   fast_finish: true
   include:
-    - python: "2.7"
+    - python: "3.7"
-      env: TARGET=Lint2.7
+      env: TARGET=Lint3.7
       script:
         - script/ci-custom.py
         - flake8 esphome
@@ -21,6 +21,12 @@ matrix:
         - script/ci-custom.py
         - flake8 esphome
         - pylint esphome
+    - python: "3.5"
+      env: TARGET=Test3.5
+      script:
+        - esphome tests/test1.yaml compile
+        - esphome tests/test2.yaml compile
+        - esphome tests/test3.yaml compile
     - python: "2.7"
       env: TARGET=Test2.7
       script:

esphome/platformio_api.py

@@ -7,6 +7,7 @@ import re
 import subprocess
 
 from esphome.core import CORE
+from esphome.py_compat import text_type, decode_text
 from esphome.util import run_external_command, run_external_process
 
 _LOGGER = logging.getLogger(__name__)
@@ -72,6 +73,7 @@ def run_upload(config, verbose, port):
 def run_idedata(config):
     args = ['-t', 'idedata']
     stdout = run_platformio_cli_run(config, False, *args, capture_stdout=True)
+    stdout = decode_text(stdout)
     match = re.search(r'{.*}', stdout)
     if match is None:
         return IDEData(None)

esphome/util.py

@@ -9,7 +9,7 @@ import subprocess
 import sys
 
 from esphome import const
-from esphome.py_compat import IS_PY2
+from esphome.py_compat import IS_PY2, IS_PY3
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -127,7 +127,7 @@ def run_external_command(func, *cmd, **kwargs):
 
     capture_stdout = kwargs.get('capture_stdout', False)
     if capture_stdout:
-        cap_stdout = sys.stdout = io.BytesIO()
+        cap_stdout = sys.stdout = io.StringIO()
 
     try:
         sys.argv = list(cmd)