Merge pull request #218 from efiop/master

workflow: extract float before converting

dvc/git_wrapper.py

@@ -309,15 +309,23 @@ class GitWrapper(GitWrapperI):
         file_name = os.path.join(settings.config.cache_dir, cache_file_name)
         full_file_name = os.path.join(self.git_dir_abs, file_name)
 
-        if os.path.exists(full_file_name):
-            lines = open(full_file_name).readlines(2)
-            if len(lines) != 1:
-                msg = '[dvc-git] Target file {} with hash {} has wrong format: {} lines were obtained, 1 expected.'
-                Logger.warn(msg.format(target, hash, len(lines)))
-            else:
-                return float(lines[0])
+        if not os.path.exists(full_file_name):
+            return None
 
-        return None
+        lines = open(full_file_name).readlines(2)
+        if len(lines) != 1:
+            msg = '[dvc-git] Target file {} with hash {} has wrong format: {} lines were obtained, 1 expected.'
+            Logger.warn(msg.format(target, hash, len(lines)))
+            return None
+
+        # Extract float from string. I.e. from 'AUC: 0.596182'
+        num = re.findall("\d+\.\d+", lines[0])
+        if len(num) != 1:
+            msg = '[dvc-git] Unable to parse metrics from \'{}\' file {}'
+            Logger.warn(msg.format(lines[0], target))
+            return None
+
+        return float(num[0])
 
     @staticmethod
     def get_merges_map():