From 024e9bfd5ec6ed6be14c958244077320afaf2f27 Mon Sep 17 00:00:00 2001
From: Dave Johansen <davejohansen@gmail.com>
Date: Mon, 16 Oct 2023 11:33:03 -0600
Subject: [PATCH 1/3] Use built-in ISO 8601 parse for Python 3.11 and later

---
 m3u8/parser.py   | 8 ++++++--
 requirements.txt | 2 +-
 setup.py         | 2 +-
 3 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/m3u8/parser.py b/m3u8/parser.py
index 3f511e3c..5fceccfa 100644
--- a/m3u8/parser.py
+++ b/m3u8/parser.py
@@ -8,7 +8,11 @@
 import re
 from urllib.parse import urljoin as _urljoin
 
-import iso8601
+try:
+    from iso8601 import parse_date
+except ImportError:
+    parse_date = datetime.datetime.fromisoformat
+
 
 from m3u8 import protocol
 
@@ -20,7 +24,7 @@
 
 
 def cast_date_time(value):
-    return iso8601.parse_date(value)
+    return parse_date(value)
 
 
 def format_date_time(value, **kwargs):
diff --git a/requirements.txt b/requirements.txt
index 57c80f08..f2d13e13 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-iso8601
+iso8601; python_version < '3.11'
diff --git a/setup.py b/setup.py
index d9a95375..f1c01d4a 100644
--- a/setup.py
+++ b/setup.py
@@ -23,5 +23,5 @@
     url="https://github.com/globocom/m3u8",
     description="Python m3u8 parser",
     long_description=long_description,
-    python_requires=">=3.6",
+    python_requires=">=3.7",
 )

From bb558f5c7270155abeba91407d98dfc6e6ba1925 Mon Sep 17 00:00:00 2001
From: Dave Johansen <davejohansen@gmail.com>
Date: Mon, 16 Oct 2023 11:43:03 -0600
Subject: [PATCH 2/3] Use backport of built-in function for performance
 improvement

---
 m3u8/parser.py   | 7 ++++---
 requirements.txt | 2 +-
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/m3u8/parser.py b/m3u8/parser.py
index 5fceccfa..07f9ac83 100644
--- a/m3u8/parser.py
+++ b/m3u8/parser.py
@@ -9,9 +9,10 @@
 from urllib.parse import urljoin as _urljoin
 
 try:
-    from iso8601 import parse_date
+    from backports.datetime_fromisoformat import MonkeyPatch
+    MonkeyPatch.patch_fromisoformat()
 except ImportError:
-    parse_date = datetime.datetime.fromisoformat
+    pass
 
 
 from m3u8 import protocol
@@ -24,7 +25,7 @@
 
 
 def cast_date_time(value):
-    return parse_date(value)
+    return datetime.datetime.fromisoformat(value)
 
 
 def format_date_time(value, **kwargs):
diff --git a/requirements.txt b/requirements.txt
index f2d13e13..c785d132 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-iso8601; python_version < '3.11'
+backports-datetime-fromisoformat; python_version < '3.11'

From e25844fcaa8d0853746493d2673a199afceca790 Mon Sep 17 00:00:00 2001
From: Dave Johansen <davejohansen@gmail.com>
Date: Mon, 16 Oct 2023 14:33:23 -0600
Subject: [PATCH 3/3] Switch to from import

---
 m3u8/parser.py | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/m3u8/parser.py b/m3u8/parser.py
index 07f9ac83..55e56e6b 100644
--- a/m3u8/parser.py
+++ b/m3u8/parser.py
@@ -3,9 +3,9 @@
 # Use of this source code is governed by a MIT License
 # license that can be found in the LICENSE file.
 
-import datetime
 import itertools
 import re
+from datetime import datetime, timedelta
 from urllib.parse import urljoin as _urljoin
 
 try:
@@ -25,7 +25,7 @@
 
 
 def cast_date_time(value):
-    return datetime.datetime.fromisoformat(value)
+    return datetime.fromisoformat(value)
 
 
 def format_date_time(value, **kwargs):
@@ -292,7 +292,7 @@ def _parse_ts_chunk(line, data, state):
         segment["program_date_time"] = state.pop("program_date_time")
     if state.get("current_program_date_time"):
         segment["current_program_date_time"] = state["current_program_date_time"]
-        state["current_program_date_time"] += datetime.timedelta(
+        state["current_program_date_time"] += timedelta(
             seconds=segment["duration"]
         )
     segment["uri"] = line
@@ -580,7 +580,7 @@ def _parse_part(line, data, state):
     # this should always be true according to spec
     if state.get("current_program_date_time"):
         part["program_date_time"] = state["current_program_date_time"]
-        state["current_program_date_time"] += datetime.timedelta(
+        state["current_program_date_time"] += timedelta(
             seconds=part["duration"]
         )