timezone and utc

Author: binderclip

basic/decorator_sp/arg_parse_deco.py

@@ -1,5 +1,5 @@
-import functools
 import base64
+import functools
 import inspect
 
 

builtin_packages/datetime_sp/timezone_sp.py

@@ -0,0 +1,17 @@
+import time
+import datetime
+
+
+def main():
+    print(time.timezone)
+    print(time.tzname)
+    print(time.localtime())
+    print(time.localtime().tm_isdst)
+    print(time.altzone)
+    utc_offset_sec = time.altzone if time.localtime().tm_isdst else time.timezone
+    utc_offset = datetime.timedelta(seconds=-utc_offset_sec)
+    print(datetime.timezone(offset=utc_offset))
+
+
+if __name__ == '__main__':
+    main()

builtin_packages/datetime_sp/utc_datetime.py

@@ -0,0 +1,33 @@
+import time
+import datetime
+
+
+def main():
+    local_now = datetime.datetime.now()
+    print(local_now)
+    print(local_now.isoformat())
+
+    utc_now = datetime.datetime.utcnow()
+    print(utc_now)
+    print(utc_now.isoformat())
+
+    # calculate the offset taking into account daylight saving time
+    utc_offset_sec = time.altzone if time.localtime().tm_isdst else time.timezone
+    utc_offset = datetime.timedelta(seconds=-utc_offset_sec)
+    timezone = datetime.timezone(offset=utc_offset)
+    print(timezone)
+
+    local_now_with_tz = datetime.datetime.now().replace(tzinfo=timezone)
+    print(local_now_with_tz)
+    print(local_now_with_tz.isoformat())
+
+    utc_now_with_tz = datetime.datetime.utcnow().replace(tzinfo=datetime.timezone.utc)
+    print(utc_now_with_tz)
+    print(utc_now_with_tz.isoformat())
+
+
+if __name__ == '__main__':
+    main()
+
+
+# https://stackoverflow.com/a/28147286/3936457