diff --git a/S30_Pandas_02.py b/S30_Pandas_02.py
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+# Pandas_02
+
+# 1148. Article Views I_Solution_Q1
+
+import pandas as pd
+
+def article_views(views: pd.DataFrame) -> pd.DataFrame:
+    df= views[views['author_id']==views['viewer_id']]
+    df.drop_duplicates(subset = ['author_id'], inplace= True)
+    df.sort_values(by = ['author_id'], inplace= True)
+    return df[['author_id']].rename(columns = {'author_id':'id'})
+
+#Alternative1
+
+import pandas as pd
+
+def article_views(views: pd.DataFrame) -> pd.DataFrame:
+    df= views[views['author_id']==views['viewer_id']]
+    df= df['author_id'].unique()
+    df= pd.DataFrame(df, columns= ['id'])
+    return df.sort_values(by= ['id'])
+
+______________________________________________________________________________________________________________________________________
+
+# 1683. Invalid Tweets_Solution_Q2
+
+import pandas as pd
+
+def invalid_tweets(tweets: pd.DataFrame) -> pd.DataFrame:
+   isValid = tweets['content'].str.len()> 15
+   df= tweets[isValid]
+   return df[['tweet_id']]
+
+#Alternative1
+
+import pandas as pd
+
+def invalid_tweets(tweets: pd.DataFrame) -> pd.DataFrame:
+   df= tweets[tweets['content'].str.len() >15]
+   return df[['tweet_id']]
+
+_________________________________________________________________________________________________________________________________________
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