python - If statement deleted by else statement in Tkinter -

i'm creating dictionary myself in tkinter , when added else statement (for query isn't in dictionary) deleted first if statement (index).

i don't know why. entry (exe) works without problems else , index works else deleted.

def search_button(self, event=none):     if self.entry.get() == 'index':         self.search_result.set("alea jacta est")      if self.entry.get() == 'exe':         self.search_result.set("lorem ipsum")      else:         self.search_result.set("entry not in database.") 

your 2nd if should elif:

def search_button(self, event=none):     if self.entry.get() == 'index':         self.search_result.set("alea jacta est")     elif self.entry.get() == 'exe':         self.search_result.set("lorem ipsum")     else:         self.search_result.set("entry not in database.") 

the problem code if entry text 'index' search_result set "alea jacta est", expected, code goes on test if entry text 'exe', isn't, search_result gets set "entry not in database.". could prevent second test putting return statement on line after self.search_result.set("alea jacta est"), it's better use elif technique.

if have lot of possible entry texts test, it's more efficient use dictionary, entry text key , result text value. here's 1 way that:

texts = {     "index": "alea jacta est",         "exe": "lorem ipsum" }  def search_button(self, event=none):     result_text = texts.get(self.entry.get(), "entry not in database.")     self.search_result.set(result_text) 

the dictionary technique more efficient because dictionary lookup fast, , relatively independent of number of items in dictionary.

in contrast, if... elif...elif... technique making linear search on possible strings until finds match, , can slow if there lot of items check, although it's ok if there small number of items check. otoh, find dict-based method more compact , easier read & modify.