headache

persiantools/jdatetime.py

@@ -958,7 +958,7 @@ def strptime(cls, data_string, fmt, locale="en"):
             "%B": cls.__seqToRE(cls, month_names, "B"),
             "%H": r"(?P<H>2[0-3]|[0-1]\d|\d)",
             "%I": r"(?P<I>1[0-2]|0[1-9]|[1-9])",
-            "%p": "(?i)" + cls.__seqToRE(cls, periods, "p"),
+            "%p": cls.__seqToRE(cls, periods, "p", "(?i)"),
             "%M": r"(?P<M>[0-5]\d|\d)",
             "%S": r"(?P<S>6[0-1]|[0-5]\d|\d)",
             "%f": r"(?P<f>\d{1,6})",
@@ -1029,15 +1029,15 @@ def strptime(cls, data_string, fmt, locale="en"):
         else:
             raise ValueError("data string and format are not matched")
 
-    def __seqToRE(self, to_convert, directive):
+    def __seqToRE(self, to_convert, directive, flags=""):
         to_convert = sorted(to_convert, key=len, reverse=True)
         for value in to_convert:
             if value != "":
                 break
         else:
             return ""
         regex = "|".join(re_escape(stuff) for stuff in to_convert)
-        regex = f"(?P<{directive}>{regex}"
+        regex = f"{flags}(?P<{directive}>{regex}"
         return "%s)" % regex
 
     def __repr__(self):