Implement PastebinClient class with self-contained paste list

src/main.py

@@ -1,21 +1,25 @@
-from pastebin.client import PastebinAPI
+from pastebin.client import PastebinClient
 
 
 def main():
-    pastebin = PastebinAPI()
+    pastebin = PastebinClient()
 
     # Fetch public paste list
-    pastes = pastebin.get_public_paste_list()
-    for paste in pastes:
-        print(paste)
+    pastebin.populate_pastes()
 
     # Fetch full data from a few pastes to test methods
-    pastes[0] = pastebin.get_paste(pastes[0])
-    pastes[1] = pastebin.get_paste(pastes[1])
+    pastebin.fetch_paste(0)
+    pastebin.fetch_paste(1)
 
-    # Test filtering
-    fetched = list(filter(lambda x: x.fetched is True, pastes))
-    print(fetched)
+    # Test get_pastes_by_language
+    py_pastes = pastebin.get_pastes_by_language("Python")
+    for i in py_pastes:
+        print(pastebin.pastes[i])
+
+    # Test if duplication is prevented by Paste.__hash__
+    print(len(pastebin.pastes))
+    pastebin.populate_pastes()
+    print(len(pastebin.pastes))
 
 
 if __name__ == '__main__':

src/pastebin/client.py

@@ -39,6 +39,14 @@ class Paste:
                 f"fetched={self.fetched})"
                 )
 
+    def __hash__(self):
+        return hash((self.title, self.href, self.lang))
+
+    def __eq__(self, other):
+        if isinstance(other, Paste):
+            return self.title == other.title and self.href == other.href and self.lang == other.lang
+        return False
+
 
 class PastebinAPI:
     """
@@ -142,3 +150,27 @@ class PastebinAPI:
             paste.fetched = True
 
         return paste
+
+
+class PastebinClient(PastebinAPI):
+    def __init__(self, headers=None, proxies=None, debug=False):
+        super().__init__(headers, proxies, debug)
+        self.pastes = []
+
+    def populate_pastes(self):
+        pastes_catalog = set(self.get_public_paste_list())
+        self.pastes = list(set(self.pastes).union(pastes_catalog))
+
+    def fetch_paste(self, paste_index):
+        if paste_index >= len(self.pastes):
+            return None
+        return self.get_paste(self.pastes[paste_index])
+
+    def get_paste_list(self):
+        return self.pastes
+
+    def total_pastes(self):
+        return len(self.pastes)
+
+    def get_pastes_by_language(self, lang):
+        return [i for i, paste in enumerate(self.pastes) if paste.lang.lower() == lang.lower()]