Fix doc compilation error

docs/conf.py

@@ -18,8 +18,8 @@
 
 sys.path.insert(0, os.path.abspath('..'))
 
+from pyod.version import __version__
 # -- Project information -----------------------------------------------------
-exec(open(os.path.join(os.path.sep, 'pyod', 'version.py')).read())
 
 project = 'pyod'
 copyright = '2018, Yue Zhao'

pyod/version.py

@@ -1 +1 @@
-__version__ = '0.5.4'
+__version__ = '0.5.5'

setup.py

@@ -1,11 +1,10 @@
 from setuptools import find_packages, setup
+from pyod.version import __version__
 
 # read the contents of README file
 from os import path
 from io import open  # for Python 2 and 3 compatibility
 
-exec(open(path.join(path.sep, 'pyod', 'version.py')).read())
-
 this_directory = path.abspath(path.dirname(__file__))
 with open(path.join(this_directory, 'README.md'), encoding='utf-8') as f:
     long_description = f.read()