问题
I want to compare two columnn -- Description and Employer. I want to see if any keywords in Employer are found in the Description column. I have broken the Employer column down to words and converted to a list. Now I want to see if any of those words are in the corresponding Description column.
Sample input:
print(df.head(25))
Date Description Amount AutoNumber \
0 3/17/2015 WW120 TFR?FR xxx8690 140.00 49246
2 3/13/2015 JX154 TFR?FR xxx8690 150.00 49246
5 3/6/2015 CANSEL SURVEY E PAY 1182.08 49246
9 3/2/2015 UE200 TFR?FR xxx8690 180.00 49246
10 2/27/2015 JH401 TFR?FR xxx8690 400.00 49246
11 2/27/2015 CANSEL SURVEY E PAY 555.62 49246
12 2/25/2015 HU204 TFR?FR xxx8690 200.00 49246
13 2/23/2015 UQ263 TFR?FR xxx8690 102.00 49246
14 2/23/2015 UT460 TFR?FR xxx8690 200.00 49246
15 2/20/2015 CANSEL SURVEY E PAY 1222.05 49246
17 2/17/2015 UO414 TFR?FR xxx8690 250.00 49246
19 2/11/2015 HI540 TFR?FR xxx8690 130.00 49246
20 2/11/2015 HQ010 TFR?FR xxx8690 177.00 49246
21 2/10/2015 WU455 TFR?FR xxx8690 200.00 49246
22 2/6/2015 JJ500 TFR?FR xxx8690 301.00 49246
23 2/6/2015 CANSEL SURVEY E PAY 1182.08 49246
24 2/5/2015 IR453 TFR?FR xxx8690 168.56 49246
26 2/2/2015 RQ574 TFR?FR xxx8690 500.00 49246
27 2/2/2015 UT022 TFR?FR xxx8690 850.00 49246
28 12/31/2014 HU521 TFR?FR xxx8690 950.17 49246
Employer
0 Cansel Survey Equipment
2 Cansel Survey Equipment
5 Cansel Survey Equipment
9 Cansel Survey Equipment
10 Cansel Survey Equipment
11 Cansel Survey Equipment
12 Cansel Survey Equipment
13 Cansel Survey Equipment
14 Cansel Survey Equipment
15 Cansel Survey Equipment
17 Cansel Survey Equipment
19 Cansel Survey Equipment
20 Cansel Survey Equipment
21 Cansel Survey Equipment
22 Cansel Survey Equipment
23 Cansel Survey Equipment
24 Cansel Survey Equipment
26 Cansel Survey Equipment
27 Cansel Survey Equipment
28 Cansel Survey Equipment
I tried something like this, but it doesn't seem to work.:
df['Text_Search'] = df['Employer'].apply(lambda x: x.split(" "))
df['Match'] = np.where(df['Description'].str.contains("|".join(df['Text_Search'])), "Yes", "No")
My desired output would be as shown below:
Date Description Amount AutoNumber \
0 3/17/2015 WW120 TFR?FR xxx8690 140.00 49246
2 3/13/2015 JX154 TFR?FR xxx8690 150.00 49246
5 3/6/2015 CANSEL SURVEY E PAY 1182.08 49246
9 3/2/2015 UE200 TFR?FR xxx8690 180.00 49246
10 2/27/2015 JH401 TFR?FR xxx8690 400.00 49246
11 2/27/2015 CANSEL SURVEY E PAY 555.62 49246
12 2/25/2015 HU204 TFR?FR xxx8690 200.00 49246
13 2/23/2015 UQ263 TFR?FR xxx8690 102.00 49246
14 2/23/2015 UT460 TFR?FR xxx8690 200.00 49246
15 2/20/2015 CANSEL SURVEY E PAY 1222.05 49246
17 2/17/2015 UO414 TFR?FR xxx8690 250.00 49246
19 2/11/2015 HI540 TFR?FR xxx8690 130.00 49246
20 2/11/2015 HQ010 TFR?FR xxx8690 177.00 49246
21 2/10/2015 WU455 TFR?FR xxx8690 200.00 49246
22 2/6/2015 JJ500 TFR?FR xxx8690 301.00 49246
23 2/6/2015 CANSEL SURVEY E PAY 1182.08 49246
24 2/5/2015 IR453 TFR?FR xxx8690 168.56 49246
26 2/2/2015 RQ574 TFR?FR xxx8690 500.00 49246
27 2/2/2015 UT022 TFR?FR xxx8690 850.00 49246
28 12/31/2014 HU521 TFR?FR xxx8690 950.17 49246
29 12/30/2014 WZ553 TFR?FR xxx8690 200.00 49246
32 12/29/2014 JW173 TFR?FR xxx8690 300.00 49246
33 12/24/2014 CANSEL SURVEY E PAY 1219.21 49246
34 12/24/2014 CANSEL SURVEY E PAY 434.84 49246
36 12/23/2014 WT002 TFR?FR xxx8690 160.00 49246
Employer Text_Search Match
0 Cansel Survey Equipment [Cansel, Survey, Equipment] No
2 Cansel Survey Equipment [Cansel, Survey, Equipment] No
5 Cansel Survey Equipment [Cansel, Survey, Equipment] Yes
9 Cansel Survey Equipment [Cansel, Survey, Equipment] No
10 Cansel Survey Equipment [Cansel, Survey, Equipment] No
11 Cansel Survey Equipment [Cansel, Survey, Equipment] Yes
12 Cansel Survey Equipment [Cansel, Survey, Equipment] No
13 Cansel Survey Equipment [Cansel, Survey, Equipment] No
14 Cansel Survey Equipment [Cansel, Survey, Equipment] No
15 Cansel Survey Equipment [Cansel, Survey, Equipment] Yes
17 Cansel Survey Equipment [Cansel, Survey, Equipment] No
19 Cansel Survey Equipment [Cansel, Survey, Equipment] No
20 Cansel Survey Equipment [Cansel, Survey, Equipment] No
21 Cansel Survey Equipment [Cansel, Survey, Equipment] No
22 Cansel Survey Equipment [Cansel, Survey, Equipment] No
23 Cansel Survey Equipment [Cansel, Survey, Equipment] Yes
24 Cansel Survey Equipment [Cansel, Survey, Equipment] No
26 Cansel Survey Equipment [Cansel, Survey, Equipment] No
27 Cansel Survey Equipment [Cansel, Survey, Equipment] No
28 Cansel Survey Equipment [Cansel, Survey, Equipment] No
29 Cansel Survey Equipment [Cansel, Survey, Equipment] No
32 Cansel Survey Equipment [Cansel, Survey, Equipment] No
33 Cansel Survey Equipment [Cansel, Survey, Equipment] Yes
34 Cansel Survey Equipment [Cansel, Survey, Equipment] Yes
36 Cansel Survey Equipment [Cansel, Survey, Equipment] No
回答1:
Here is a readable solution using an individual search_func:
def search_func(row):
matches = [test_value in row["Description"].lower()
for test_value in row["Text_Search"]]
if any(matches):
return "Yes"
else:
return "No"
This function is then applied row-wise:
# create example data
df = pd.DataFrame({"Description": ["CANSEL SURVEY E PAY", "JX154 TFR?FR xxx8690"],
"Employer": ["Cansel Survey Equipment", "Cansel Survey Equipment"]})
print(df)
Description Employer
0 CANSEL SURVEY E PAY Cansel Survey Equipment
1 JX154 TFR?FR xxx8690 Cansel Survey Equipment
# create text searches and match column
df["Text_Search"] = df["Employer"].str.lower().str.split()
df["Match"] = df.apply(search_func, axis=1)
# show result
print(df)
Description Employer Text_Search Match
0 CANSEL SURVEY E PAY Cansel Survey Equipment [cansel, survey, equipment] Yes
1 JX154 TFR?FR xxx8690 Cansel Survey Equipment [cansel, survey, equipment] No
回答2:
Here is fast and memory-saving vectrorized solution, which uses sklearn.feature_extraction.text.CountVectorizer method:
from sklearn.feature_extraction.text import CountVectorizer
vect = CountVectorizer(min_df=1, lowercase=True)
X = vect.fit_transform(df['Employer'])
cols_emp = vect.get_feature_names()
X = vect.fit_transform(df['Description'])
cols_desc = vect.get_feature_names()
common_cols_idx = [i for i,col in enumerate(cols_desc) if col in cols_emp]
df['Match'] = (X.toarray()[:, common_cols_idx] == 1).any(1)
Source DF:
In [259]: df
Out[259]:
Date Description Amount AutoNumber Employer
0 3/17/2015 WW120 TFR?FR xxx8690 140.00 49246 Cansel Survey Equipment
2 3/13/2015 JX154 TFR?FR xxx8690 150.00 49246 Cansel Survey Equipment
5 3/6/2015 CANSEL SURVEY E PAY 1182.08 49246 Cansel Survey Equipment
9 3/2/2015 UE200 TFR?FR xxx8690 180.00 49246 Cansel Survey Equipment
10 2/27/2015 JH401 TFR?FR xxx8690 400.00 49246 Cansel Survey Equipment
11 2/27/2015 CANSEL SURVEY E PAY 555.62 49246 Cansel Survey Equipment
12 2/25/2015 HU204 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment
13 2/23/2015 UQ263 TFR?FR xxx8690 102.00 49246 Cansel Survey Equipment
14 2/23/2015 UT460 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment
15 2/20/2015 CANSEL SURVEY E PAY 1222.05 49246 Cansel Survey Equipment
17 2/17/2015 UO414 TFR?FR xxx8690 250.00 49246 Cansel Survey Equipment
19 2/11/2015 HI540 TFR?FR xxx8690 130.00 49246 Cansel Survey Equipment
20 2/11/2015 HQ010 TFR?FR xxx8690 177.00 49246 Cansel Survey Equipment
21 2/10/2015 WU455 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment
22 2/6/2015 JJ500 TFR?FR xxx8690 301.00 49246 Cansel Survey Equipment
23 2/6/2015 CANSEL SURVEY E PAY 1182.08 49246 Cansel Survey Equipment
24 2/5/2015 IR453 TFR?FR xxx8690 168.56 49246 Cansel IR453
26 2/2/2015 RQ574 TFR?FR xxx8690 500.00 49246 Cansel Survey Equipment
27 2/2/2015 UT022 TFR?FR xxx8690 850.00 49246 Cansel Survey Equipment
28 12/31/2014 HU521 TFR?FR xxx8690 950.17 49246 Cansel Survey HU521
Result:
In [261]: df
Out[261]:
Date Description Amount AutoNumber Employer Match
0 3/17/2015 WW120 TFR?FR xxx8690 140.00 49246 Cansel Survey Equipment False
2 3/13/2015 JX154 TFR?FR xxx8690 150.00 49246 Cansel Survey Equipment False
5 3/6/2015 CANSEL SURVEY E PAY 1182.08 49246 Cansel Survey Equipment True
9 3/2/2015 UE200 TFR?FR xxx8690 180.00 49246 Cansel Survey Equipment False
10 2/27/2015 JH401 TFR?FR xxx8690 400.00 49246 Cansel Survey Equipment False
11 2/27/2015 CANSEL SURVEY E PAY 555.62 49246 Cansel Survey Equipment True
12 2/25/2015 HU204 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment False
13 2/23/2015 UQ263 TFR?FR xxx8690 102.00 49246 Cansel Survey Equipment False
14 2/23/2015 UT460 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment False
15 2/20/2015 CANSEL SURVEY E PAY 1222.05 49246 Cansel Survey Equipment True
17 2/17/2015 UO414 TFR?FR xxx8690 250.00 49246 Cansel Survey Equipment False
19 2/11/2015 HI540 TFR?FR xxx8690 130.00 49246 Cansel Survey Equipment False
20 2/11/2015 HQ010 TFR?FR xxx8690 177.00 49246 Cansel Survey Equipment False
21 2/10/2015 WU455 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment False
22 2/6/2015 JJ500 TFR?FR xxx8690 301.00 49246 Cansel Survey Equipment False
23 2/6/2015 CANSEL SURVEY E PAY 1182.08 49246 Cansel Survey Equipment True
24 2/5/2015 IR453 TFR?FR xxx8690 168.56 49246 Cansel IR453 True
26 2/2/2015 RQ574 TFR?FR xxx8690 500.00 49246 Cansel Survey Equipment False
27 2/2/2015 UT022 TFR?FR xxx8690 850.00 49246 Cansel Survey Equipment False
28 12/31/2014 HU521 TFR?FR xxx8690 950.17 49246 Cansel Survey HU521 True
Some explanations:
In [266]: cols_desc
Out[266]:
['cansel',
'fr',
'hi540',
'hq010',
'hu204',
'hu521',
'ir453',
'jh401',
'jj500',
'jx154',
'pay',
'rq574',
'survey',
'tfr',
'ue200',
'uo414',
'uq263',
'ut022',
'ut460',
'wu455',
'ww120',
'xxx8690']
In [267]: cols_emp
Out[267]: ['cansel', 'equipment', 'hu521', 'ir453', 'survey']
In [268]: common_cols_idx = [i for i,col in enumerate(cols_desc) if col in cols_emp]
In [269]: common_cols_idx
Out[269]: [0, 5, 6, 12]
In [270]: X.toarray()
Out[270]:
array([[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 1],
[0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0],
[0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1],
[0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 1]], dtype=int64)
In [271]: X.toarray()[:, common_cols_idx]
Out[271]:
array([[0, 0, 0, 0],
[0, 0, 0, 0],
[1, 0, 0, 1],
[0, 0, 0, 0],
[0, 0, 0, 0],
[1, 0, 0, 1],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[1, 0, 0, 1],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[1, 0, 0, 1],
[0, 0, 1, 0],
[0, 0, 0, 0],
[0, 0, 0, 0],
[0, 1, 0, 0]], dtype=int64)
In [272]: X.toarray()[:, common_cols_idx] == 1
Out[272]:
array([[False, False, False, False],
[False, False, False, False],
[ True, False, False, True],
[False, False, False, False],
[False, False, False, False],
[ True, False, False, True],
[False, False, False, False],
[False, False, False, False],
[False, False, False, False],
[ True, False, False, True],
[False, False, False, False],
[False, False, False, False],
[False, False, False, False],
[False, False, False, False],
[False, False, False, False],
[ True, False, False, True],
[False, False, True, False],
[False, False, False, False],
[False, False, False, False],
[False, True, False, False]], dtype=bool)
In [273]: (X.toarray()[:, common_cols_idx] == 1).any(1)
Out[273]: array([False, False, True, False, False, True, False, False, False, True, False, False, False, False, False, True, True, Fals
e, False, True], dtype=bool)
回答3:
Here is one solution, which splits text into lower-case sets and uses sets intersection for each row:
In [160]: x['Match'] = x.Description.str.lower().str.split().map(set).to_frame('desc') \
...: .apply(lambda r: (x.Employer.str.lower().str.split().map(set) & r.desc).any(),
...: axis=1)
...:
In [161]: x
Out[161]:
Date Description Amount AutoNumber Employer Match
0 3/17/2015 WW120 TFR?FR xxx8690 140.00 49246 Cansel Survey Equipment False
2 3/13/2015 JX154 TFR?FR xxx8690 150.00 49246 Cansel Survey Equipment False
5 3/6/2015 CANSEL SURVEY E PAY 1182.08 49246 Cansel Survey Equipment True
9 3/2/2015 UE200 TFR?FR xxx8690 180.00 49246 Cansel Survey Equipment False
10 2/27/2015 JH401 TFR?FR xxx8690 400.00 49246 Cansel Survey Equipment False
11 2/27/2015 CANSEL SURVEY E PAY 555.62 49246 Cansel Survey Equipment True
12 2/25/2015 HU204 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment False
13 2/23/2015 UQ263 TFR?FR xxx8690 102.00 49246 Cansel Survey Equipment False
14 2/23/2015 UT460 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment False
15 2/20/2015 CANSEL SURVEY E PAY 1222.05 49246 Cansel Survey Equipment True
17 2/17/2015 UO414 TFR?FR xxx8690 250.00 49246 Cansel Survey Equipment False
19 2/11/2015 HI540 TFR?FR xxx8690 130.00 49246 Cansel Survey Equipment False
20 2/11/2015 HQ010 TFR?FR xxx8690 177.00 49246 Cansel Survey Equipment False
21 2/10/2015 WU455 TFR?FR xxx8690 200.00 49246 Cansel Survey Equipment False
22 2/6/2015 JJ500 TFR?FR xxx8690 301.00 49246 Cansel Survey Equipment False
23 2/6/2015 CANSEL SURVEY E PAY 1182.08 49246 Cansel Survey Equipment True
24 2/5/2015 IR453 TFR?FR xxx8690 168.56 49246 Cansel Survey Equipment False
26 2/2/2015 RQ574 TFR?FR xxx8690 500.00 49246 Cansel Survey Equipment False
27 2/2/2015 UT022 TFR?FR xxx8690 850.00 49246 Cansel Survey Equipment False
28 12/31/2014 HU521 TFR?FR xxx8690 950.17 49246 Cansel Survey Equipment False
PS it's pretty slow as it's using not vectorized .apply(..., axis=1) method
回答4:
Timing comparison for different solutions
Let's prepare a bit bigger DF - 2.000 rows:
In [3]: df = pd.concat([df] * 10**2, ignore_index=True)
In [4]: df.shape
Out[4]: (2000, 5)
Solution 1: df.apply(..., axis=1):
df["Text_Search"] = df.Employer.str.lower().str.split().map(set)
In [15]: %%timeit
...: df.Description.str.lower().str.split().map(set).to_frame('desc') \
...: .apply(lambda r: (df["Text_Search"] & r.desc).any(),
...: axis=1)
...:
1 loop, best of 3: 5.06 s per loop
Solution 2: CountVectorizer
from sklearn.feature_extraction.text import CountVectorizer
vect = CountVectorizer(min_df=1, lowercase=True)
In [8]: %%timeit
...: X = vect.fit_transform(df['Employer'])
...: cols_emp = vect.get_feature_names()
...: X = vect.fit_transform(df['Description'])
...: cols_desc = vect.get_feature_names()
...: common_cols_idx = [i for i,col in enumerate(cols_desc) if col in cols_emp]
...: (X.toarray()[:, common_cols_idx] == 1).any(1)
...:
10 loops, best of 3: 88.2 ms per loop
Solution 3: df.apply(search_func, axis=1)
df["Text_Search"] = df["Employer"].str.lower().str.split()
In [12]: %%timeit
...: df.apply(search_func, axis=1)
...:
1 loop, best of 3: 362 ms per loop
NOTE: Solution 1 is too slow, so i will not "timeit" this solution for bigger DFs
Comparison of df.apply(search_func, axis=1) and CountVectorizer for 20.000 rows DF:
In [16]: df = pd.concat([df] * 10, ignore_index=True)
In [17]: df.shape
Out[17]: (20000, 6)
In [20]: %%timeit
...: df.apply(search_func, axis=1)
...:
1 loop, best of 3: 3.66 s per loop
In [21]: %%timeit
...: X = vect.fit_transform(df['Employer'])
...: cols_emp = vect.get_feature_names()
...: X = vect.fit_transform(df['Description'])
...: cols_desc = vect.get_feature_names()
...: common_cols_idx = [i for i,col in enumerate(cols_desc) if col in cols_emp]
...: (X.toarray()[:, common_cols_idx] == 1).any(1)
...:
1 loop, best of 3: 825 ms per loop
Comparison of df.apply(search_func, axis=1) and CountVectorizer for 200.000 rows DF:
In [22]: df = pd.concat([df] * 10, ignore_index=True)
In [23]: df.shape
Out[23]: (200000, 6)
In [24]: %%timeit
...: df.apply(search_func, axis=1)
...:
1 loop, best of 3: 36.8 s per loop
In [25]: %%timeit
...: X = vect.fit_transform(df['Employer'])
...: cols_emp = vect.get_feature_names()
...: X = vect.fit_transform(df['Description'])
...: cols_desc = vect.get_feature_names()
...: common_cols_idx = [i for i,col in enumerate(cols_desc) if col in cols_emp]
...: (X.toarray()[:, common_cols_idx] == 1).any(1)
...:
1 loop, best of 3: 8.28 s per loop
Conclusion: CountVectorized solution is apporx. 4.44 times faster compared to df.apply(search_func, axis=1)
来源：https://stackoverflow.com/questions/42683249/python-pandas-how-to-match-list-of-strings-with-a-dataframe-column