Can't drop a certain row in Pandas

note that title is index.

I tried

i = movies[movies['rating']==3.4444].index
movies.drop(i)
# This one has no effect and didn't removed

2:

movies.drop(0)

3:

movies.drop(movies.iloc[0])

error of 3:

KeyError: '[3.4444444444444446, 9.0] not found in axis'

4:

movies.drop(' ')

error of 4:

KeyError: "[' '] not found in axis"

5:

movies.drop(' ',axis=0)

error of 5:

KeyError: "[' '] not found in axis"

I want to drop the first row, which has no title(or a blank) with 3.44 rating and 9 rat_count.