diff --git a/python/datetime.py b/python/datetime.py
index 96c4cfdf..9328e8a1 100644
--- a/python/datetime.py
+++ b/python/datetime.py
@@ -1,48 +1,39 @@
-
 from time import localtime
 
-
 class timedelta:
     def __init__(self, days=0, seconds=0):
         self.days = days
         self.seconds = seconds
 
     def __repr__(self):
-        return f"datetime.timedelta({self.days}, {self.seconds})"
-
-    def check(self, other, class_type):
-        if type(other) is not class_type:
-            return NotImplemented
+        return f"datetime.timedelta(days={self.days}, seconds={self.seconds})"
 
     def __eq__(self, other: 'timedelta') -> bool:
-        self.check(other, timedelta)
+        if type(other) is not timedelta:
+            return NotImplemented
         return (self.days, self.seconds) == (other.days, other.seconds)
 
     def __lt__(self, other: 'timedelta') -> bool:
-        self.check(other, timedelta)
+        if type(other) is not timedelta:
+            return NotImplemented
         return (self.days, self.seconds) < (other.days, other.seconds)
 
     def __le__(self, other: 'timedelta') -> bool:
-        self.check(other, timedelta)
+        if type(other) is not timedelta:
+            return NotImplemented
         return (self.days, self.seconds) <= (other.days, other.seconds)
 
     def __gt__(self, other: 'timedelta') -> bool:
-        self.check(other, timedelta)
+        if type(other) is not timedelta:
+            return NotImplemented
         return (self.days, self.seconds) > (other.days, other.seconds)
 
     def __ge__(self, other: 'timedelta') -> bool:
-        self.check(other, timedelta)
+        if type(other) is not timedelta:
+            return NotImplemented
         return (self.days, self.seconds) >= (other.days, other.seconds)
 
 
-class timezone:
-    def __init__(self, delta: timedelta):
-        self.delta = delta
-
-    def __repr__(self):
-        return f"datetime.timezone({self.delta})"
-
-
 class date:
     def __init__(self, year: int, month: int = None, day: int = None):
         self.year = year
@@ -54,28 +45,29 @@ class date:
         t = localtime()
         return date(t.tm_year, t.tm_mon, t.tm_mday)
 
-    def check(self, other, class_type):
-        if type(other) is not class_type:
-            return NotImplemented
-
     def __eq__(self, other: 'date') -> bool:
-        self.check(other, date)
+        if type(other) is not date:
+            return NotImplemented
         return (self.year, self.month, self.day) == (other.year, other.month, other.day)
 
     def __lt__(self, other: 'date') -> bool:
-        self.check(other, date)
+        if type(other) is not date:
+            return NotImplemented
         return (self.year, self.month, self.day) < (other.year, other.month, other.day)
 
     def __le__(self, other: 'date') -> bool:
-        self.check(other, date)
+        if type(other) is not date:
+            return NotImplemented
         return (self.year, self.month, self.day) <= (other.year, other.month, other.day)
 
     def __gt__(self, other: 'date') -> bool:
-        self.check(other, date)
+        if type(other) is not date:
+            return NotImplemented
         return (self.year, self.month, self.day) > (other.year, other.month, other.day)
 
     def __ge__(self, other: 'date') -> bool:
-        self.check(other, date)
+        if type(other) is not date:
+            return NotImplemented
         return (self.year, self.month, self.day) >= (other.year, other.month, other.day)
 
     def __str__(self):
@@ -86,7 +78,7 @@ class date:
 
 
 class datetime(date):
-    def __init__(self, year: int, month: int = None, day: int = None, hour: int = None, minute: int = None, second: int = None, tzinfo: timezone = None):
+    def __init__(self, year: int, month: int = None, day: int = None, hour: int = None, minute: int = None, second: int = None):
         super().__init__(year, month, day)
         # Validate and set hour, minute, and second
         if hour is not None and not 0 <= hour <= 23:
@@ -98,17 +90,12 @@ class datetime(date):
         if second is not None and not 0 <= second <= 59:
             raise ValueError("Second must be between 0 and 59")
         self.second = second
-        self.tzinfo = tzinfo
 
     @staticmethod
     def now():
         t = localtime()
         return datetime(t.tm_year, t.tm_mon, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec)
 
-    def check(self, other, class_type):
-        if type(other) is not class_type:
-            return NotImplemented
-
     def __str__(self):
         return f"{self.year}-{self.month:02}-{self.day:02} {self.hour:02}:{self.minute:02}:{self.second:02}"
 
@@ -116,34 +103,40 @@ class datetime(date):
         return f"datetime.datetime({self.year}, {self.month}, {self.day}, {self.hour}, {self.minute}, {self.second})"
 
     def __eq__(self, other) -> bool:
-        self.check(other, datetime)
+        if type(other) is not datetime:
+            return NotImplemented
         return (self.year, self.month, self.day, self.hour, self.minute, self.second) ==\
             (other.year, other.month, other.day,
              other.hour, other.minute, other.second)
 
     def __lt__(self, other) -> bool:
-        self.check(other, datetime)
+        if type(other) is not datetime:
+            return NotImplemented
         return (self.year, self.month, self.day, self.hour, self.minute, self.second) <\
             (other.year, other.month, other.day,
              other.hour, other.minute, other.second)
 
     def __le__(self, other) -> bool:
-        self.check(other, datetime)
+        if type(other) is not datetime:
+            return NotImplemented
         return (self.year, self.month, self.day, self.hour, self.minute, self.second) <=\
             (other.year, other.month, other.day,
              other.hour, other.minute, other.second)
 
     def __gt__(self, other) -> bool:
-        self.check(other, datetime)
+        if type(other) is not datetime:
+            return NotImplemented
         return (self.year, self.month, self.day, self.hour, self.minute, self.second) >\
             (other.year, other.month, other.day,
              other.hour, other.minute, other.second)
 
     def __ge__(self, other) -> bool:
-        self.check(other, datetime)
+        if type(other) is not datetime:
+            return NotImplemented
         return (self.year, self.month, self.day, self.hour, self.minute, self.second) >=\
             (other.year, other.month, other.day,
              other.hour, other.minute, other.second)
 
     def timestamp(self) -> float:
-        return self.now()
+        raise NotImplementedError
+