創建文檔術語矩陣時出現屬性錯誤

Question

我正在嘗試創建以熊貓數據框的形式表示的文檔術語矩陣。這是我到目前爲止的代碼：

df_profession['Athlete_Clean'] = df_profession['Athlete Biographies'].str.lower() 
df_profession['Athlete_Clean'] = df_profession['Athlete_Clean'].apply(lambda x: ''.join([i for i in x if not i.isdigit()])) 
df_profession['Athlete_Clean'] = df_profession['Athlete_Clean'].str.split() 
df_profession['Athlete_Clean'] = [word for word in df_profession['Athlete_Clean'] if word not in punctuation] 
df_profession['Athlete_Clean'] = [word for word in df_profession['Athlete_Clean'] if word not in stopwords.words('english')] 

profession_dtm_athlete = pandas.DataFrame(countvec.fit_transform(df_profession['Athlete_Clean']).toarray(), columns=countvec.get_feature_names(), index = df.index) 
profession_dtm_athlete 

當我運行這段代碼，我得到了以下錯誤：

'list' object has no attribute 'lower' 

我怎樣才能擺脫這種錯誤的？

Answer 1

包裹列表STR（）對象將它們轉換爲字符串：

df_profession['Athlete_Clean'] = str(df_profession['Athlete Biographies']).lower() 
df_profession['Athlete_Clean'] = df_profession['Athlete_Clean'].apply(lambda x: ''.join([i for i in x if not i.isdigit()])) 
df_profession['Athlete_Clean'] = str(df_profession['Athlete_Clean']).split() 
df_profession['Athlete_Clean'] = [word for word in df_profession['Athlete_Clean'] if word not in punctuation] 
df_profession['Athlete_Clean'] = [word for word in df_profession['Athlete_Clean'] if word not in stopwords.words('english')] 

profession_dtm_athlete = pandas.DataFrame(countvec.fit_transform(df_profession['Athlete_Clean']).toarray(), columns=countvec.get_feature_names(), index = df.index) 
profession_dtm_athlete