Fix small errors

count_name_occurrences.py

@@ -8,7 +8,7 @@ df["occurrences_in_wikipedia"] = 0
 
 CHUNK_SIZE = 1024 * 1024  # 1 MB
 
-with open("../data/wikipedia/wikipedia_corpus.txt", "rb", encoding="utf-8") as f:
+with open("../data/wikipedia/wikipedia_corpus.txt", "rb") as f:
     CHUNK_NO = 1
     while True:
         print(f"reading Wikipedia data: approx. {CHUNK_NO} MB/8100 MB", end="\r")
@@ -18,13 +18,13 @@ with open("../data/wikipedia/wikipedia_corpus.txt", "rb", encoding="utf-8") as f
             break
 
         for index, row in df.iterrows():
-            name = row['name']
+            name = row['name'].encode()
             count = wikipedia_text.count(name)
             df.at[index, "occurrences_in_wikipedia"] += count
         
         CHUNK_NO += 1
 
-df.to_csv("./data/names_nationality_wikipedia.csv", index=False)
+df.to_csv("../data/names_nationality_wikipedia.csv", index=False)
 
 avg_occurrences = df.groupby("nationality")["occurrences_in_wikipedia"].mean()
 for nationality, avg_count in avg_occurrences.items():