if ... python/pandasのelif文

Question

私は人の名前を並べ替えるスクリプトに取り組んでいます。私はcsvモジュールを使ってこれを使っていましたが、これはもっと大きなパンダプロジェクトに結びつくので、私はそれを変換すると思っていました。

1つの名前フィールドを最初、中間、最後のフィールドに分割する必要があります。元のフィールドには最初の名前があります。例：Richard Wayne Van Dyke。

私は名前を分割しましたが、 "Van Dyke"を姓にします。ここで

作品csvモジュールのための私のコードです：ここでは

with open('inputfil.csv') as inf: 
    docs = csv.reader(inf) 
    next(ccaddocs, None) 
    for i in docs: 
     #print i 
     fullname = i[1]#it's the second column in the input file 
     namelist =fullname.split(' ') 
     firstname = namelist[0] 
     middlename = namelist[1] 
     if len(namelist) == 2: 
      lastname = namelist[1] 
      middlename = '' 
     elif len(namelist) == 3: 
      lastname = namelist[2] 
     elif len(namelist) == 4: 
      lastname = namelist[2] + " " + namelist[3] #gets Van Dyke in lastname 
     print "First: " + firstname + " middle: " + middlename + " last: " + lastname 

は、私は苦労してる私のパンダベースのコードです：

df = pd.DataFrame({'Name':['Richard Wayne Van Dyke','Gary Del Barco','Dave Allen Smith']}) 
df = df.fillna('') 
df =df.astype(unicode) 
splits = df['Name'].str.split(' ', expand=True) 

df['firstName'] = splits[0] 
if splits[2].notnull and splits[3].isnull:#this works for Bret Allen Cardwell 

    df['lastName'] = splits[2] 
    df['middleName'] = splits[1] 
    print "Case 1: First: " + df['firstName'] + " middle: " +df['middleName'] + " last: " + df['lastName'] 
elif splits[2].all() == 'Del':#trying to get last name of "Del Barco" 
    print 'del' 
    df['middleName'] = '' 
    df['lastName'] = splits[2] + " " + splits[3] 
    print "Case 2: First: " + df['firstName'] + " middle: " +df['middleName'] + " last: " + df['lastName'] 

elif splits[3].notnull: #trying to get last name of "Van Dyke" 
    df['middleName'] = splits[1] 
    df['lastName'] = splits[2] + " " + splits[3] 
    print "Case 3: First: " + df['firstName'] + " middle: " +df['middleName'] + " last: " + df['lastName'] 

私は「という基本的な何かがあります私は行方不明です。

Answer 1

if len(name) >= 3: # (assume that user only has one middle name) 

    firstname = splits[0] 
    middlename = splits[1] 
    lastnames = splits[2:] (catch all last names into a list)