add lxml dependency

Author: oroulet

.travis.yml

@@ -6,17 +6,16 @@ python:
 # command to install dependencies
 install:
   - pip install python-dateutil
+  - pip install pytz
+  - pip install lxml
   - if [[ $TRAVIS_PYTHON_VERSION == '3.4' ]]; then pip install cryptography ; fi
-  - if [[ $TRAVIS_PYTHON_VERSION == '3.4' ]]; then pip install pytz ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install futures ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install cryptography ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install trollius ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install enum34 ; fi
-  - if [[ $TRAVIS_PYTHON_VERSION == '2.7' ]]; then pip install pytz ; fi
     #- if [[ $TRAVIS_PYTHON_VERSION == 'pypy3' ]]; then pip install cryptography ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == 'pypy' ]]; then pip install futures ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == 'pypy' ]]; then pip install trollius ; fi
   - if [[ $TRAVIS_PYTHON_VERSION == 'pypy' ]]; then pip install enum34 ; fi
-  - if [[ $TRAVIS_PYTHON_VERSION == 'pypy' ]]; then pip install pytz ; fi
 # command to run tests
 script: ./run-tests.sh

README.md

@@ -13,11 +13,7 @@ OPC UA binary protocol implementation is quasi complete and has been tested agai
 
 Most low level code is autogenerated from xml specification, thus adding missing functionality to client or server is often trivial.
 
-Using Python > 3.4 the dependencies are cryptography, dateutil and pytz. If using python 2.7 or pypy < 3 you also need to install enum34, trollius(asyncio), and futures(concurrent.futures), with pip for example.
-```
-pip install enum34 trollius futures
-```
-
+Using Python > 3.4 the dependencies are cryptography, dateutil, lxml and pytz. If using python 2.7 or pypy < 3 you also need to install enum34, trollius(asyncio), and futures(concurrent.futures), with pip for example.
 
 coveryage.py reports a test coverage of over 90% of code, most of non-tested code is autogenerated code that is not used yet.
 

setup.py

@@ -2,10 +2,9 @@
 
 import sys
 
+install_requires = ["python-dateutil", "pytz", "lxml"]
 if sys.version_info[0] < 3:
-    install_requires = ["python-dateutil", "enum34", "trollius", "futures", "pytz"]
-else:
-    install_requires = ["python-dateutil", "pytz"]
+    install_requires.extend(["enum34", "trollius", "futures"])
 
 setup(name="freeopcua",
       version="0.90.2",