问pandas数据帧中的"KeyError“

EN

ps = PorterStemmer()
tokens = []
for i in range(0,len(df)):
    tweet = str(df['clean_tweet'][i])
    tweet = tweet.lower()
    tweet = tweet.split()
    tweet = [ps.stem(word) for word in tweet if word not in stopWords]
    tweet = ' '.join(tweet)
    tokens.append(tweet)
    print(tokens[i])
df['clean_tweet'] = tokens
df.head()

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
~\anaconda3\envs\machine_learning\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance)
   3079             try:
-> 3080                 return self._engine.get_loc(casted_key)
   3081             except KeyError as err:

pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas\_libs\index.pyx in pandas._libs.index.IndexEngine.get_loc()

pandas\_libs\index.pyx in pandas._libs.index.IndexEngine._get_loc_duplicates()

pandas\_libs\index_class_helper.pxi in pandas._libs.index.Int64Engine._maybe_get_bool_indexer()

pandas\_libs\index.pyx in pandas._libs.index.IndexEngine._unpack_bool_indexer()

KeyError: 31962

The above exception was the direct cause of the following exception:

KeyError                                  Traceback (most recent call last)
<ipython-input-30-7794ad45df60> in <module>
      2 tokens = []
      3 for i in range(0,len(df)):
----> 4     tweet = str(df['clean_tweet'][i])
      5     tweet = tweet.lower()
      6     tweet = tweet.split()

~\anaconda3\envs\machine_learning\lib\site-packages\pandas\core\series.py in __getitem__(self, key)
    851 
    852         elif key_is_scalar:
--> 853             return self._get_value(key)
    854 
    855         if is_hashable(key):

~\anaconda3\envs\machine_learning\lib\site-packages\pandas\core\series.py in _get_value(self, label, takeable)
    959 
    960         # Similar to Index.get_value, but we do not fall back to positional
--> 961         loc = self.index.get_loc(label)
    962         return self.index._get_values_for_loc(self, loc, label)
    963 

~\anaconda3\envs\machine_learning\lib\site-packages\pandas\core\indexes\base.py in get_loc(self, key, method, tolerance)
   3080                 return self._engine.get_loc(casted_key)
   3081             except KeyError as err:
-> 3082                 raise KeyError(key) from err
   3083 
   3084         if tolerance is not None:

KeyError: 31962