From c9f575e8a657b046b55bb366324a9aa584dccce0 Mon Sep 17 00:00:00 2001
From: Johannes Hentschel <johannes.hentschel@epfl.ch>
Date: Sun, 21 Jan 2024 15:40:21 +0100
Subject: [PATCH] refactor: adds SLICE_INTERVAL_REGEX constant

---
 src/ms3/utils/constants.py | 5 +++++
 src/ms3/utils/functions.py | 3 ++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/ms3/utils/constants.py b/src/ms3/utils/constants.py
index e1324107..b3a97655 100644
--- a/src/ms3/utils/constants.py
+++ b/src/ms3/utils/constants.py
@@ -318,6 +318,11 @@
 
 KEYSIG_DICT_ENTRY_REGEX = r"(\d+): (-?\d+)(?:, )?"
 TIMESIG_DICT_ENTRY_REGEX = r"(\d+): (\d+\/\d+)(?:, )?"
+SLICE_INTERVAL_REGEX = (
+    r"[\[\)]((?:\d+\.?\d*)|(?:\.\d+)), ((?:\d+\.?\d*)|(?:\.\d+))[\)\]]"
+)
+"""Regular expression for slice interval in open/closed notation and any flavour of floating point numbers,
+e.g. [0, 1.5) or (.5, 2.]"""
 
 MS3_HTML = {
     "#005500": "ms3_darkgreen",
diff --git a/src/ms3/utils/functions.py b/src/ms3/utils/functions.py
index 123ff3d0..b72a196a 100644
--- a/src/ms3/utils/functions.py
+++ b/src/ms3/utils/functions.py
@@ -67,6 +67,7 @@
     MS3_HTML,
     MS3_RGB,
     SCORE_EXTENSIONS,
+    SLICE_INTERVAL_REGEX,
     STANDARD_COLUMN_ORDER,
     STANDARD_NAMES,
     STANDARD_NAMES_OR_GIT,
@@ -2451,7 +2452,7 @@ def parse_interval_index_column(df, column=None, closed="left"):
     -------
     :obj:`pandas.IntervalIndex`
     """
-    iv_regex = r"[\[\(]([0-9]*\.[0-9]+), ([0-9]*\.[0-9]+)[\)\]]"
+    iv_regex = SLICE_INTERVAL_REGEX
     if column is None:
         iv_strings = df.index
     else: