使用 python 中的 pandas 检索数据列上的匹配字数

Question

我有df,

Name      Description
Ram Ram   is one of the good cricketer
Sri Sri   is one of the member
Kumar     Kumar is a keeper

和一个列表， my_list=["one","good","ravi","ball"]

我正在尝试从 my_list 中获取至少有一个关键字的行。

我试过了，

  mask=df["Description"].str.contains("|".join(my_list),na=False)

我得到 output_df,

Name    Description
Ram     Ram is one of ONe crickete
Sri     Sri is one of the member
Ravi    Ravi is a player, ravi is playing
Kumar   there is a BALL

我还想添加 "Description" 中的关键字及其在单独列中的计数，

我想要的输出是，

Name    Description                      pre-keys          keys     count
Ram     Ram is one of ONe crickete         one,good,ONe   one,good    2
Sri     Sri is one of the member           one            one         1
Ravi    Ravi is a player, ravi is playing  Ravi,ravi      ravi        1
Kumar   there is a BALL                    ball           ball        1

Answer 1

使用str.findall + str.join + str.len:

extracted = df['Description'].str.findall('(' + '|'.join(my_list) + ')') 
df['keys'] = extracted.str.join(',')
df['count'] = extracted.str.len()
print (df)
  Name                       Description      keys  count
0  Ram  Ram is one of the good cricketer  one,good      2
1  Sri          Sri is one of the member       one      1

编辑：

import re
my_list=["ONE","good"]

extracted = df['Description'].str.findall('(' + '|'.join(my_list) + ')', flags=re.IGNORECASE)
df['keys'] = extracted.str.join(',')
df['count'] = extracted.str.len()
print (df)
  Name                       Description      keys  count
0  Ram  Ram is one of the good cricketer  one,good      2
1  Sri          Sri is one of the member       one      1

Answer 2

用 str.findall 试了一下。

c = df.Description.str.findall('({})'.format('|'.join(my_list)))
df['keys'] = c.apply(','.join) # or c.str.join(',')
df['count'] = c.str.len()

df[df['count'] > 0]

  Name                       Description      keys  count
0  Ram  Ram is one of the good cricketer  one,good      2
1  Sri          Sri is one of the member       one      1

使用 python 中的 pandas 检索数据列上的匹配字数

Retrieving matching word count on a datacolumn using pandas in python

python

data-analysis

dataframe

pandas