[cocopp] Get version number directly

One of the reasons we need `pkg_resources` right now is to get the
version number of `cocopp`. Instead, we can load it directly by
importing `.version'.

Partial fix for #2229

code-postprocessing/cocopp/toolsdivers.py

@@ -13,7 +13,6 @@
 import numpy as np
 from matplotlib import pyplot as plt
 from subprocess import CalledProcessError, STDOUT
-import pkg_resources
 
 from . import genericsettings, testbedsettings
 
@@ -586,7 +585,7 @@ def get_version_label(algorithmID=None):
         the string. If more than one reference value is present in the data,
         the string displays also a warning.
     """
-    coco_version = pkg_resources.require('cocopp')[0].version
+    from .version import __version__ as coco_version
     reference_values = testbedsettings.get_reference_values(algorithmID)
 
     if reference_values and type(reference_values) is set:        
@@ -600,6 +599,7 @@ def get_version_label(algorithmID=None):
 
 
 def path_in_package(sub_path=""):
+    import pkg_resources
     """return the absolute path prepended to `subpath` in this module.
     """
     egg_info = pkg_resources.require('cocopp')[0]