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[英]Search for a partial string match in a data frame column from a list - Pandas - Python
[英]Partial keyword match not working when I am trying to create a new column from a pandas data frame in python?
我有一個數據框描述,如下所述
Description
我正在嘗試對描述列進行關鍵字搜索,並且我將關鍵字列表作為列表。
我當前的代碼只檢查完全匹配而不是部分匹配。如果行中存在多個關鍵字,這些關鍵字將被分隔符分隔並填充新列。
我的代碼
data=pd.read_excel('path_to_datafile.xlsx')
keywords=['dinner','government','Agents','entertainment','Agent']
keywords_lower = [item.lower() for item in keywords]
s=set(keywords_lower)
data['Keyword'] = data['Description'].apply(lambda x: '/'.join(set(x.lower().split()).intersection(s)))
如何才能做到這一點?
extractall
將完成這項工作,但您必須首先構建模式:
...
keywords_lower = [item.lower() for item in keywords]
pattern = '(' + '|'.join('(?:' + i + ')' for i in keywords_lower) + ')'
df['Keyword'] = df['Description'].str.extractall(pattern, re.I).groupby(level=0).agg('/'.join)
你會得到:
Description Keyword
0 Government entertainment people Govern/entertain
1 Dinner with CFO Dinner
2 Commission to Agents government Agent/govern
( pattern
在這里'((?:dinner)|(?:govern)|(?:agent)|(?:entertain))'
)
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