[ENH] A class to parse task data

narps_open/data/task.py

@@ -0,0 +1,25 @@
+#!/usr/bin/python
+# coding: utf-8
+
+""" A mdoule to parse task data from NARPS for the narps_open package """
+
+from os.path import join
+from json import load
+
+from narps_open.utils.configuration import Configuration
+from narps_open.utils.singleton import SingletonMeta
+
+class TaskInformation(dict, metaclass=SingletonMeta):
+    """ This class allows to access information about the task performed in NARPS """
+
+    def __init__(self):
+        super().__init__()
+
+        # Load information from the task-MGT_bold.json file
+        file_name = join(Configuration()['directories']['dataset'], 'task-MGT_bold.json')
+        self.update(load(file))
+
+        # Compute derived information
+        self['NumberOfSlices'] = len(self['SliceTiming'])
+        self['AcquisitionTime'] = self['RepetitionTime'] / self['NumberOfSlices']
+        self['TotalReadoutTime'] = self['NumberOfSlices'] * self['EffectiveEchoSpacing']