1 files changed, 53 insertions, 0 deletions
diff --git a/acispy/analyze_path.py b/acispy/analyze_path.py
new file mode 100644
index 0000000..578a6db
--- /dev/null
+++ b/acispy/analyze_path.py
@@ -0,0 +1,53 @@
+#!/usr/bin/env python3
+#
+# Copyright (c) 2017 Weitian LI <liweitianux@live.com>
+# MIT license
+#
+# Weitian LI
+# 2017-02-06
+
+"""
+Extract the object name and observation ID from the directory path.
+
+The root directory of the object data has the format:
+    <name>_oi<obsid>
+"""
+
+import re
+
+
+RE_DATA_DIR = re.compile(r"^.*/(?P<name>[^/_]+)_oi(?P<obsid>\d+).*$")
+
+
+def get_name(path):
+    """
+    Extract the object name from the directory path.
+
+    Parameters
+    ----------
+    path : str
+        Path to the data directory
+
+    Returns
+    -------
+    objname : str
+        The name part of the data directory
+    """
+    return RE_DATA_DIR.match(path).group("name")
+
+
+def get_obsid(path):
+    """
+    Extract the observation ID from the directory path.
+
+    Parameters
+    ----------
+    path : str
+        Path to the data directory
+
+    Returns
+    -------
+    obsid : int
+        The observation ID of the data
+    """
+    return int(RE_DATA_DIR.match(path).group("obsid"))