refactor: adds SLICE_INTERVAL_REGEX constant

Author: Johannes Hentschel

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",

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: