Question

我想遍历名为主题的Dataframe列之一中的所有行，并从名为 keywords 的词典中查找多个关键词。如果字典中的键与“数据框”列中的单词匹配，我想将匹配键的字典值对添加到数据框中名为 Category 的新列中。下面的代码是我的第一个想法，即向列表中添加值，然后将该列表作为新列添加到我的Dataframe中，但是显然索引将不匹配。每当关键字在主题列中匹配时，是否可以将关键字值直接直接附加到数据框？

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'''

Image of example code

Answer 1

您可以先extract个加入的关键字，然后再map：

keywords = {'BOR':'Broker of Record','New Vendor':'New Vendor Build'}

df = pd.DataFrame({"Category":["Something BOR","Something New Vendor","Something for nothing"]})

df["new"] = df["Category"].str.extract(f"({'|'.join(keywords)})",expand=False).map(keywords)

print (df)

                Category               new
0          Something BOR  Broker of Record
1   Something New Vendor  New Vendor Build
2  Something for nothing               NaN

如何匹配熊猫系列中的关键词

1 个答案: