Update app.py

app.py

@@ -3,13 +3,13 @@ import pandas as pd
 from collections import defaultdict
 
 df = pd.read_csv("./stackv2_languages_freq.csv")
+df["extension"].fillna("[no ext]", inplace=True)
 
 langs = sorted(list(df["language"].unique()))
 exts = list(df["extension"].unique())
 
 def compute(lang):
     df_lang = df[df["language"]==lang]
-    df["extension"].fillna("[no ext]", inplace=True)
     # clean up weird exts
     df_lang = df_lang[df_lang["ext_fraction_per_lang"] > 0.0001].reset_index()