[xcvrd] Remove dependence on enum; Add 'sonic-py-common' as dependencies in setup.py (sonic-net#106)

Remove dependence on the 'enum' package, as we are currently transitioning from Python 2 to Python 3 and there are installation conflict issues between the `enum` package and the `enum34` package.

Add 'sonic-py-common' as dependencies in setup.py for xcvrd, also add spaces around "equals" signs.

Author: jleveque

sonic-xcvrd/scripts/xcvrd

@@ -16,10 +16,9 @@ try:
     import threading
     import time
 
-    from enum import Enum
     from sonic_py_common import daemon_base, device_info, logger
-    from swsscommon import swsscommon
     from sonic_py_common import multi_asic
+    from swsscommon import swsscommon
 except ImportError, e:
     raise ImportError (str(e) + " - required module not found")
 
@@ -46,13 +45,21 @@ XCVRD_MAIN_THREAD_SLEEP_SECS = 60
 SFP_STATUS_REMOVED = '0'
 SFP_STATUS_INSERTED = '1'
 
-# SFP error code enum, new elements can be added to the enum if new errors need to be supported.
-SFP_STATUS_ERR_ENUM = Enum('SFP_STATUS_ERR_ENUM', ['SFP_STATUS_ERR_I2C_STUCK', 'SFP_STATUS_ERR_BAD_EEPROM', 
-                                                  'SFP_STATUS_ERR_UNSUPPORTED_CABLE', 'SFP_STATUS_ERR_HIGH_TEMP',
-                                                  'SFP_STATUS_ERR_BAD_CABLE'], start=2)
-
-# Convert the error code to string and store them in a set for convenience
-errors_block_eeprom_reading = set(str(error_code.value) for error_code in SFP_STATUS_ERR_ENUM)
+# SFP error codes, stored as strings. Can add more as needed.
+SFP_STATUS_ERR_I2C_STUCK = '2'
+SFP_STATUS_ERR_BAD_EEPROM = '3'
+SFP_STATUS_ERR_UNSUPPORTED_CABLE = '4'
+SFP_STATUS_ERR_HIGH_TEMP = '5'
+SFP_STATUS_ERR_BAD_CABLE = '6'
+
+# Store the error codes in a set for convenience
+errors_block_eeprom_reading = {
+    SFP_STATUS_ERR_I2C_STUCK,
+    SFP_STATUS_ERR_BAD_EEPROM,
+    SFP_STATUS_ERR_UNSUPPORTED_CABLE,
+    SFP_STATUS_ERR_HIGH_TEMP,
+    SFP_STATUS_ERR_BAD_CABLE
+}
 
 EVENT_ON_ALL_SFP = '-1'
 # events definition

sonic-xcvrd/setup.py

@@ -1,22 +1,26 @@
 from setuptools import setup
 
 setup(
-    name='sonic-xcvrd',
-    version='1.0',
-    description='Transceiver monitoring daemon for SONiC',
-    license='Apache 2.0',
-    author='SONiC Team',
-    author_email='[email protected]',
-    url='https://github.com/Azure/sonic-platform-daemons',
-    maintainer='Kebo Liu',
-    maintainer_email='[email protected]',
-    scripts=[
+    name = 'sonic-xcvrd',
+    version = '1.0',
+    description = 'Transceiver monitoring daemon for SONiC',
+    license = 'Apache 2.0',
+    author = 'SONiC Team',
+    author_email = '[email protected]',
+    url = 'https://github.com/Azure/sonic-platform-daemons',
+    maintainer = 'Kebo Liu',
+    maintainer_email = '[email protected]',
+    scripts = [
         'scripts/xcvrd',
     ],
-    setup_requires= [
+    install_requires = [
+        # NOTE: This package also requires swsscommon, but it is not currently installed as a wheel
+        'sonic-py-common',
+    ],
+    setup_requires = [
         'wheel'
     ],
-    classifiers=[
+    classifiers = [
         'Development Status :: 4 - Beta',
         'Environment :: No Input/Output (Daemon)',
         'Intended Audience :: Developers',
@@ -28,5 +32,5 @@
         'Programming Language :: Python :: 2.7',
         'Topic :: System :: Hardware',
     ],
-    keywords='sonic SONiC TRANSCEIVER transceiver daemon XCVRD xcvrd',
+    keywords = 'sonic SONiC TRANSCEIVER transceiver daemon XCVRD xcvrd',
 )