use holo_kw in dataset identifier hash

CHANGELOG

@@ -1,5 +1,6 @@
 0.1.4
  - add hologram file formats: HyperSpy and tif-based 
+ - use hologram keyword arguments to generate dataset identifer
 0.1.3
  - format series and single hdf5: override raw meta data
  - include background data in determination of data set identifiers

docs/README.md

@@ -1,4 +1,4 @@
-ODTbrain documentation
+qpformat documentation
 ======================
 To install the requirements for building the documentation, run
 

qpformat/file_formats/__init__.py

@@ -53,10 +53,9 @@ def _identifier_data(self):
         data.sort()
         # also use the folder name
         data.append(op.basename(self.path))
-        for key in sorted(list(self.meta_data.keys())):
-            data.append("{}={}".format(key, self.meta_data[key]))
-        idsum = hash_obj(data)
-        return idsum
+        # add meta data
+        data += self._identifier_meta()
+        return hash_obj(data)
 
     @staticmethod
     def _search_files(path):

qpformat/file_formats/dataset.py

@@ -89,11 +89,23 @@ def _compute_bgid(self, bg=None):
     @functools.lru_cache(maxsize=32)
     def _identifier_data(self):
         data = []
+        # data
         with open(self.path, "rb") as fd:
             data.append(fd.read(50 * 1024))
+        data += self._identifier_meta()
+        return hash_obj(data)
+
+    @functools.lru_cache(maxsize=32)
+    def _identifier_meta(self):
+        data = []
+        # meta data
         for key in sorted(list(self.meta_data.keys())):
             value = self.meta_data[key]
             data.append("{}={}".format(key, value))
+        # hologram info
+        for key in sorted(list(self.holo_kw.keys())):
+            value = self.holo_kw[key]
+            data.append("{}={}".format(key, value))
         return hash_obj(data)
 
     @property