Làm thế nào để chọn ngẫu nhiên một mục từ một danh sách?
Giả sử tôi có danh sách sau:
foo = ['a', 'b', 'c', 'd', 'e']
Cách đơn giản nhất để lấy một mục ngẫu nhiên từ danh sách này là gì?
Nếu bạn muốn gần với thực sự ngẫu nhiên, thì tôi đề nghị
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
5 từ thư viện tiêu chuẩn [mới trong Python 3.6.]:truly random, then I suggest >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
5 from the standard library [New in Python 3.6.]:>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
Trên đây tương đương với khuyến nghị trước đây của tôi, sử dụng đối tượng
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
6 từ mô -đun >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7 với phương thức >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
8 - có sẵn trước đó trong Python 2:>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
Và bây giờ:
>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
Nếu bạn muốn lựa chọn giả giả xác định, hãy sử dụng hàm
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
8 [thực sự là một phương thức ràng buộc trên đối tượng >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
0]:>>> random.choice
Có vẻ như ngẫu nhiên, nhưng nó thực sự không, mà chúng ta có thể thấy nếu chúng ta liên tục liên tục:
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
Một lời bình luận:
Đây không phải là về việc liệu ngẫu nhiên.choice có thực sự ngẫu nhiên hay không. Nếu bạn sửa chữa hạt giống, bạn sẽ nhận được kết quả có thể tái tạo - và đó là những gì hạt giống được thiết kế cho. Bạn cũng có thể chuyển một hạt giống cho Systemrandom.
1>>> import random # Python 2 compatible >>> sr = random.SystemRandom[] >>> foo = list['abcde'] >>> foo ['a', 'b', 'c', 'd', 'e']
Chà, vâng, bạn có thể chuyển nó một đối số "hạt giống", nhưng bạn sẽ thấy rằng đối tượng
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
6 chỉ đơn giản bỏ qua nó:def seed[self, *args, **kwds]:
"Stub method. Not used for a system random number generator."
return None
Đưa ra một danh sách và nhiệm vụ của chúng tôi là chọn ngẫu nhiên các yếu tố từ danh sách trong Python bằng các chức năng khác nhau. Việc chọn các số ngẫu nhiên từ danh sách đôi khi có thể được sử dụng trong khi xây dựng các trò chơi, chọn một phạm vi ngẫu nhiên, v.v. & nbsp;
Thí dụ :
Input: [2, 3, 4 , 5, 6 ] Output: 2 Input: [3, 5, 6, 3, 2] Output: 6
Sử dụng Random.choice [] & nbsp; để chọn giá trị ngẫu nhiên từ danh sách
Hàm ngẫu nhiên.choice [] này được thiết kế để lấy mẫu ngẫu nhiên từ danh sách trong Python và do đó là phương pháp phổ biến nhất để đạt được nhiệm vụ này là tìm nạp một số ngẫu nhiên từ danh sách. & NBSP;Random sampling from a list in Python and hence is the most common method to achieve this task of fetching a random number from a list.
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7____28>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
0>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
7>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
0 >>> random.choice
1 >>> random.choice
2>>> random.choice
3>>> random.choice
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> random.choice
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2Output:
Original list is : [1, 4, 5, 2, 7] Random selected number is : 1
Sử dụng Random.RandRange [] để chọn giá trị ngẫu nhiên từ danh sách
Phương thức ngẫu nhiên.randrange [] được sử dụng để tạo một số ngẫu nhiên trong một phạm vi đã cho, chúng ta có thể chỉ định phạm vi là 0 đến độ dài của danh sách và lấy chỉ mục, sau đó là giá trị tương ứng.
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7____28>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
0>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
7>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
0 >>> random.choice
1 >>> random.choice
2>>> random.choice
3>>> random.choice
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> random.choice
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2Output:
Original list is : [1, 4, 5, 2, 7] Random selected number is : 7
Sử dụng Random.RandRange [] để chọn giá trị ngẫu nhiên từ danh sách
Phương thức ngẫu nhiên.randrange [] được sử dụng để tạo một số ngẫu nhiên trong một phạm vi đã cho, chúng ta có thể chỉ định phạm vi là 0 đến độ dài của danh sách và lấy chỉ mục, sau đó là giá trị tương ứng.
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7____28>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
0>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
7>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
0 >>> random.choice
1 >>> random.choice
2>>> random.choice
3>>> random.choice
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> random.choice
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2Output:
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
0Sử dụng Random.RandRange [] để chọn giá trị ngẫu nhiên từ danh sách
Phương thức ngẫu nhiên.randrange [] được sử dụng để tạo một số ngẫu nhiên trong một phạm vi đã cho, chúng ta có thể chỉ định phạm vi là 0 đến độ dài của danh sách và lấy chỉ mục, sau đó là giá trị tương ứng.
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7____28>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
0>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
7>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
0 >>> random.choice
1 >>> random.choice
2>>> random.choice
3>>> random.choice
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> random.choice
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
9 >>> random.choice
1 >>> random.choice
2>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
>>> random.seed[42]; random.choice[foo], random.choice[foo], random.choice[foo]
['d', 'a', 'b']
2Output:
Original list is : [1, 4, 5, 2, 7] Random selected number is : 7
Sử dụng Random.RandRange [] để chọn giá trị ngẫu nhiên từ danh sách
Python có chức năng tích hợp gọi là Random.sample []. Mô -đun ngẫu nhiên chứa hàm ngẫu nhiên.sample []. Nó có khả năng chọn nhiều mục từ một danh sách.
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7____28>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
0>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
4>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
7>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
0 >>> random.choice
1 >>> random.choice
2>>> random.choice
3>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
88>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
89>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
91Output:
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
2Sử dụng Random.Choices [] để chọn giá trị ngẫu nhiên từ danh sách
Hàm ngẫu nhiên.choices được lưu trữ trong mô -đun ngẫu nhiên []. Chọn nhiều mục từ danh sách hoặc một mục từ một chuỗi cụ thể là tiện dụng với sự trợ giúp của chức năng ngẫu nhiên.random.choices function is stored in the random module []. Selecting numerous items from a list or a single item from a particular sequence is handy with the help of random.choices function.
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
97>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
99>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
01__29>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> random.choice
0 >>> random.choice
1 >>> random.choice
2>>> random.choice
3>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
88>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
16>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
0>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
91Output:
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
3>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
9>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
88>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
89>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
2>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
91
>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
Sử dụng Random.Choices [] để chọn giá trị ngẫu nhiên từ danh sách
Python3
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7Hàm ngẫu nhiên.choices được lưu trữ trong mô -đun ngẫu nhiên []. Chọn nhiều mục từ danh sách hoặc một mục từ một chuỗi cụ thể là tiện dụng với sự trợ giúp của chức năng ngẫu nhiên.
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
3 >>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
7>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
5>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
6 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
7>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
97>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
99>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
9>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
01__29Chọn k giá trị ngẫu nhiên từ danh sách
Ở đây chúng tôi đã nhóm tất cả các yếu tố trong một cặp kích thước k.
>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
22 >>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
23>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
24>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
25>>> sr.choice[foo]
'd'
>>> sr.choice[foo]
'e'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'b'
>>> sr.choice[foo]
'a'
>>> sr.choice[foo]
'c'
>>> sr.choice[foo]
'c'
8>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
77>>> import random # Python 2 compatible
>>> sr = random.SystemRandom[]
>>> foo = list['abcde']
>>> foo
['a', 'b', 'c', 'd', 'e']
78>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
91Output:
>>> from secrets import choice # Python 3 only
>>> choice[list['abcde']]
'c'
4