manifest.py: Add method "gets()" to get values of a list of items

1 files changed, 33 insertions, 1 deletions

diff --git a/scripts/manifest.py b/scripts/manifest.py
index 5b476f8..7ca8695 100755
--- a/scripts/manifest.py
+++ b/scripts/manifest.py
@@ -20,6 +20,8 @@ and other structures in the YAML file.
 
 import os
 import argparse
+from collections import OrderedDict
+
 import ruamel.yaml
 
 
@@ -49,13 +51,43 @@ class Manifest:
         """
         Get the value of the specified item in the manifest.
 
-        If the specified item doesn't exist, raise a ``KeyError``.
+        Parameters
+        ----------
+        key : str
+            The key of the item to be requested.
+
+        Raises
+        ------
+        KeyError :
+            If the specified item doesn't exist.
         """
         if key in self.manifest:
             return self.manifest[key]
         else:
             raise KeyError("manifest doesn't have item: '%s'" % key)
 
+    def gets(self, keys, default=None):
+        """
+        Get the value of the specified item in the manifest.
+
+        Parameters
+        ----------
+        keys : list[str]
+            A list of keys specifying the items to be requested.
+
+        Returns
+        -------
+        data : `~OrderedDict`
+            Ordered dictionary containing the requested items.
+
+        Returns
+        -------
+        """
+        data = OrderedDict([
+            (key, self.manifest.get(key, default)) for key in keys
+        ])
+        return data
+
     def set(self, key, value):
         """
         Set the value of the specified item in the manifest.