Chọn hàng bằng logic
Nhập môn Khoa học Dữ liệu với Python
Hillary Green-Lerman
Lead Data Scientist, Looker
Tiếp tục điều tra
print(credit_records.head())
suspect location date item price
0 Kirstine Smith Groceries R Us January 6, 2018 broccoli 1.25
1 Gertrude Cox Petroleum Plaza January 6, 2018 fizzy drink 1.90
2 Fred Frequentist Groceries R Us January 6, 2018 broccoli 1.25
3 Gertrude Cox Groceries R Us January 12, 2018 broccoli 1.25
4 Kirstine Smith Clothing Club January 9, 2018 shirt 14.25
Mệnh đề logic trong Python
question = 12 * 8
solution = 96
question == solution
True
Boolean: True và False
Các dạng logic khác
, >=, <, <=
price = 2.25
price > 5.00
False
Khác
name = 'bayes'
name != 'Bayes'
True
Dùng logic với DataFrame
credit_records.price > 20.00
0 False
1 False
2 False
3 False
4 True
5 False
...
99 True
100 True
101 True
102 False
103 False
Dùng logic với DataFrame
credit_records[credit_records.price > 20.00]
suspect location date item price
28 Fred Frequentist Clothing Club January 3, 2018 dress 20.15
29 Kirstine Smith Clothing Club January 5, 2018 dress 20.15
33 Ronald Aylmer Fisher Petroleum Plaza January 7, 2018 gas 24.95
37 Fred Frequentist Clothing Club January 8, 2018 dress 20.15
40 Gertrude Cox Clothing Club January 1, 2018 dress 20.15
41 Kirstine Smith Petroleum Plaza January 5, 2018 gas 24.95
...
Dùng logic với DataFrame
Dùng logic với DataFrame
credit_records[credit_records.suspect == 'Ronald Aylmer Fisher']
suspect location date item price
7 Ronald Aylmer Fisher Clothing Club January 8, 2018 pants 12.05
8 Ronald Aylmer Fisher Clothing Club January 13, 2018 shirt 14.25
12 Ronald Aylmer Fisher Petroleum Plaza January 10, 2018 carwash 13.25
22 Ronald Aylmer Fisher Groceries R Us January 13, 2018 eggs 6.50
26 Ronald Aylmer Fisher Burger Mart January 8, 2018 fries 1.95
...
Ayo berlatih!
Nhập môn Khoa học Dữ liệu với Python
