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为简单的文本推荐系统定义函数时出现此语法错误。我觉得这很简单，我忽略了。

from sklearn.feature_extraction.text import TfidfVectorizer

# define tfidvectorizer
tfv = TfidfVectorizer(min_df=3,  max_features=None, 
            strip_accents='unicode', analyzer='word',token_pattern=r'\w{1,}',
            ngram_range=(1, 3), use_idf=1,smooth_idf=1,sublinear_tf=1,
            stop_words = 'english')

# fills with empty string
df.description = df.description.fillna('')

# fit TF-IDF on 'description' text
tfv_matrix = tfv.fit_transform(df.description)

tfv_matrix.shape

出局：(86, 1033)

from sklearn.metrics.pairwise import sigmoid_kernel

# compute sigmoid kernel
sig = sigmoid_kernel(tfv_matrix, tfv_matrix)

# reverse mapping of indices and strain names
indices = pd.Series(df.index, index=df.name_ocp.drop_duplicates()

# define recommendation function
def give_rec(strain, sig=sig):
    # get index corresponding to name_ocp
    idx = indices[strain]

    # get pairwsie similarity scores 
    sig_scores = list(enumerate(sig[idx]))

    # sort strains 
    sig_scores = sorted(sig_scores, key=lambda x: x[1], reverse=True)

    # scores of 10 most similar strains
    sig_scores = sig_scores[1:11]

    # strain name indices
    strain_indices = [i[0] for i in sig_scores]

    # top 10 most similar strains
    return df.name_ocp.iloc[strain_indices]

出去：

File "<ipython-input-68-bf5092b4ce7d>", line 10
    def give_rec(strain, sig=sig):
      ^
SyntaxError: invalid syntax

'def' 和函数名称都是它们在 jupyter 笔记本中的适当颜色。间距看起来不错。不知道这笔交易是什么。有什么帮助吗？谢谢你。

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