title: How to append strings to a list in a dictionary
body: <p>I have some trouble trying to append in a dictionary, I really dont know how to use it, because every time I try to run my code, Its says "'str' object has no attribute 'append'"... I have something like this...</p>
  
  <pre><code>oscars= {
  'Best movie': ['The shape of water','Lady Bird','Dunkirk'],
  'Best actress':['Meryl Streep','Frances McDormand'],
  'Best actor': ['Gary Oldman','Denzel Washington']
  }
  </code></pre>
  
  <p>so I want to make a new category, and then I want to make a cycle where the user can enter as many nominees as he want... </p>
  
  <pre><code>   newcategory=input("Enter new category: ")
     nominees=input("Enter a nominee: ")
     oscars[newcategory]=nominees
     addnewnominees= str(input("Do you want to enter more nominees: (yes/no):"))
     while addnewnominees!= "No":
         nominees=input("Enter new nominee: ")
         oscars[newcategory].append(nominees)
         addnewnominees= str(input("Do you want to enter more nominees: (yes/no):"))
  </code></pre>
  
  <p>Anyone knows how to use the append in dictionaries?</p>