3 has occurred 2 times6
8 has occurred 5 times3
3 has occurred 2 times8
3 has occurred 2 times9
2 has occurred 3 times0
2 has occurred 3 times1
2 has occurred 3 times0
3 has occurred 2 times9
2 has occurred 3 times0
2 has occurred 3 times5
2 has occurred 3 times0
3 has occurred 2 times9
2 has occurred 3 times0
2 has occurred 3 times9
2 has occurred 3 times0
2 has occurred 3 times5
2 has occurred 3 times0
3 has occurred 2 times9
2 has occurred 3 times0
3 has occurred 2 times9
3 has occurred 2 times06
3 has occurred 2 times07
8 has occurred 5 times3
3 has occurred 2 times9
3 has occurred 2 times40
3 has occurred 2 times41
3 has occurred 2 times42
3 has occurred 2 times43
3 has occurred 2 times44
3 has occurred 2 times45
3 has occurred 2 times46____247
đầu ra
8 has occurred 5 times
Phương pháp 2. Đếm số lần xuất hiện của một phần tử trong danh sách Sử dụng hàm đếm[]
Ý tưởng là sử dụng phương thức list[] để đếm số lần xuất hiện.
Python3
3 has occurred 2 times75
3 has occurred 2 times76
8 has occurred 5 times0
8 has occurred 5 times1
3 has occurred 2 times3
3 has occurred 2 times63
3 has occurred 2 times5
3 has occurred 2 times6
8 has occurred 5 times3
3 has occurred 2 times8
3 has occurred 2 times9
2 has occurred 3 times0
2 has occurred 3 times1
2 has occurred 3 times0
3 has occurred 2 times9
2 has occurred 3 times0
2 has occurred 3 times5
2 has occurred 3 times0
3 has occurred 2 times9
2 has occurred 3 times0
2 has occurred 3 times9
2 has occurred 3 times0
2 has occurred 3 times5
2 has occurred 3 times0
3 has occurred 2 times9
2 has occurred 3 times0
3 has occurred 2 times9
3 has occurred 2 times06
3 has occurred 2 times07
8 has occurred 5 times3
3 has occurred 2 times9
3 has occurred 2 times40
3 has occurred 2 times41
3 has occurred 2 times42
3 has occurred 2 times43
3 has occurred 2 times44
3 has occurred 2 times45
3 has occurred 2 times46____247
đầu ra
3 has occurred 2 times0
Phương pháp 3. Đếm số lần xuất hiện của một phần tử trong danh sách Sử dụng Counter[]
Phương thức truy cập trả về một từ điển với các lần xuất hiện của tất cả các phần tử dưới dạng một cặp khóa-giá trị, trong đó khóa là phần tử và giá trị là số lần phần tử đó đã xuất hiện.
Python3
8 has occurred 5 times07
8 has occurred 5 times08____109
8 has occurred 5 times10
8 has occurred 5 times11
8 has occurred 5 times12
8 has occurred 5 times3
3 has occurred 2 times8
3 has occurred 2 times1
2 has occurred 3 times0
3 has occurred 2 times1
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times31
2 has occurred 3 times0
8 has occurred 5 times31
3 has occurred 2 times06
8 has occurred 5 times35
3 has occurred 2 times07
8 has occurred 5 times3
8 has occurred 5 times23
8 has occurred 5 times39
8 has occurred 5 times3
8 has occurred 5 times41
3 has occurred 2 times40
3 has occurred 2 times41
3 has occurred 2 times42
3 has occurred 2 times43
3 has occurred 2 times44
8 has occurred 5 times47
đầu ra
3 has occurred 2 times
Phương pháp 4. Đếm số lần xuất hiện của một phần tử trong danh sách Sử dụng Countof[]
Nhà điều hành. CountOf[] được sử dụng để đếm số lần xuất hiện của b trong một. Nó đếm số lần xuất hiện của giá trị. Nó trả về Số lần xuất hiện của giá trị
Python3
8 has occurred 5 times09
8 has occurred 5 times49
8 has occurred 5 times11
8 has occurred 5 times12
8 has occurred 5 times3
3 has occurred 2 times8
3 has occurred 2 times1
2 has occurred 3 times0
3 has occurred 2 times1
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times31
2 has occurred 3 times0
8 has occurred 5 times31
3 has occurred 2 times06
8 has occurred 5 times35
3 has occurred 2 times07
8 has occurred 5 times3
8 has occurred 5 times19
3 has occurred 2 times40
8 has occurred 5 times81
8 has occurred 5 times82
8 has occurred 5 times83
đầu ra
2 has occurred 3 times
Phương pháp 5. Đếm số lần xuất hiện của một phần tử trong danh sách Sử dụng khả năng hiểu từ điển
Python cho phép hiểu từ điển. Chúng ta có thể tạo từ điển bằng các biểu thức đơn giản. Việc hiểu từ điển có dạng {key. giá trị cho [khóa, giá trị] trong iterable}
Python3
8 has occurred 5 times84
8 has occurred 5 times3
3 has occurred 2 times8
8 has occurred 5 times87
2 has occurred 3 times0
8 has occurred 5 times89
2 has occurred 3 times0
8 has occurred 5 times89
2 has occurred 3 times0
8 has occurred 5 times93
2 has occurred 3 times0
8 has occurred 5 times87
2 has occurred 3 times0
8 has occurred 5 times97
2 has occurred 3 times0
8 has occurred 5 times97
2 has occurred 3 times0
8 has occurred 5 times87
2 has occurred 3 times0
8 has occurred 5 times93
2 has occurred 3 times0
8 has occurred 5 times89
2 has occurred 3 times0
3 has occurred 2 times007
3 has occurred 2 times06
3 has occurred 2 times009
8 has occurred 5 times3
3 has occurred 2 times011
8 has occurred 5 times6
3 has occurred 2 times013
8 has occurred 5 times8
3 has occurred 2 times015
3 has occurred 2 times40
3 has occurred 2 times017
3 has occurred 2 times007
3 has occurred 2 times019
đầu ra
3 has occurred 2 times0
Phương pháp 6. Đếm số lần xuất hiện của một phần tử trong danh sách Sử dụng thư viện của gấu trúc
Dòng gấu trúc. Hàm value_counts[] trả về một Sê-ri chứa số lượng giá trị duy nhất. Đối tượng kết quả sẽ theo thứ tự giảm dần sao cho phần tử đầu tiên là phần tử xuất hiện thường xuyên nhất
Python3
8 has occurred 5 times09
3 has occurred 2 times021
8 has occurred 5 times11
8 has occurred 5 times12
8 has occurred 5 times3
3 has occurred 2 times8
3 has occurred 2 times1
2 has occurred 3 times0
3 has occurred 2 times1
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times31
2 has occurred 3 times0
8 has occurred 5 times31
3 has occurred 2 times06
8 has occurred 5 times2
8 has occurred 5 times3
3 has occurred 2 times050
3 has occurred 2 times40
3 has occurred 2 times41____7053
8 has occurred 5 times83
3 has occurred 2 times40
3 has occurred 2 times056
đầu ra
3 has occurred 2 times4
Phương pháp. Sử dụng hiểu danh sách
Python3
8 has occurred 5 times12
8 has occurred 5 times3
3 has occurred 2 times8
3 has occurred 2 times1
2 has occurred 3 times0
3 has occurred 2 times1
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times19
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times23
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times27
2 has occurred 3 times0
8 has occurred 5 times31
2 has occurred 3 times0
8 has occurred 5 times31
3 has occurred 2 times06
8 has occurred 5 times7____13
3 has occurred 2 times1
3 has occurred 2 times07
8 has occurred 5 times3
3 has occurred 2 times087
8 has occurred 5 times6
3 has occurred 2 times089
8 has occurred 5 times8
8 has occurred 5 times12
3 has occurred 2 times01
3 has occurred 2 times089
8 has occurred 5 times3
8 has occurred 5 times3
3 has occurred 2 times096
3 has occurred 2 times40
3 has occurred 2 times41
3 has occurred 2 times099
3 has occurred 2 times00
3 has occurred 2 times01
2 has occurred 3 times0
3 has occurred 2 times03
3 has occurred 2 times04
3 has occurred 2 times05
8 has occurred 5 times83
Làm cách nào để đếm số lần một chuỗi xuất hiện trong danh sách Python?
Cách dễ nhất để đếm số lần xuất hiện trong danh sách Python của một mục nhất định là sử dụng Python. phương thức đếm[] . Phương thức này được áp dụng cho một danh sách nhất định và nhận một đối số duy nhất. Đối số được truyền vào phương thức được tính và số lần xuất hiện của mục đó trong danh sách được trả về.
Làm cách nào để đếm chuỗi trong Python?
Chuỗi Python Phương thức đếm[]
.
Làm cách nào để đếm số lần một từ xuất hiện trong danh sách trong Python?
Cách "tiêu chuẩn" [không có thư viện bên ngoài] để tính số lần xuất hiện từ trong danh sách là sử dụng hàm đếm[] của đối tượng danh sách. The count[] method is a built-in function that takes an element as its only argument and returns the number of times that element appears in the list.