问python中的Lambda参数函数

EN

**Traceback (most recent call last):
  File "C:\Users\HAMIMOUNE\AppData\Roaming\nltk_data\shakespeare.py", line 8, in <module>
    [ line.split('\t') for line in open("AFINN-96.txt") ]))
TypeError: <lambda>() missing 1 required positional argument: 'v'**

from nltk.corpus import shakespeare
from collections import defaultdict
import json
hamlet = shakespeare.xml('hamlet.xml')
speeches = hamlet.findall('.//SPEECH')
prevSpeaker =  speeches[0].find('SPEAKER').text
afinn = dict(map(lambda k,v: (k,int(v)), 
                [ line.split('\t') for line in open("AFINN-96.txt") ])) 

dict = defaultdict(lambda: defaultdict(lambda: 0))
for speech in speeches:
    speaker = speech.find('SPEAKER').text
    lines = "\n".join(line.text for line in speech.findall('LINE') if line.text is not None)
    sentiment = sum(map(lambda word: afinn.get(word, 0), lines.lower().split()))
    dict[speaker][prevSpeaker] += sentiment
    prevSpeaker = speaker
print(json.dumps(dict, sort_keys=True, indent=4))