Làm thế nào để bạn chuyển một biến cho một hàm trong python?

Một hàm có thể nhận nhiều đối số, các đối số này có thể là đối tượng, biến (cùng hoặc khác kiểu dữ liệu) và hàm. Hàm Python là đối tượng hạng nhất. Trong ví dụ bên dưới, một hàm được gán cho một biến. Bài tập này không gọi hàm. Nó lấy đối tượng hàm được tham chiếu bởi hét và tạo một tên thứ hai trỏ tới nó, hét

Nội dung chính Show

Hàm bậc cao hơn
chức năng bao bọc
Hàm bao bọc Lambda
Python truyền biến cho hàm như thế nào?
Bạn có thể chuyển một biến vào một hàm không?

# Python program to illustrate functions

# can be treated as objects

def shout(text):

return

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

3_______0_______4

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

Hello, this is before function execution
This is inside the function !!
This is after function execution

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

đầu ra

HELLO
HELLO

Hàm bậc cao hơn

Vì hàm là đối tượng nên chúng ta có thể chuyển chúng làm đối số cho các hàm khác. Các hàm có thể nhận các hàm khác làm đối số còn được gọi là hàm bậc cao. Trong ví dụ bên dưới, một hàm hello được tạo lấy một hàm làm đối số

# Python program to illustrate functions

Hello, this is before function execution
This is inside the function !!
This is after function execution

def shout(text):

return

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

square of 2 is :4

The cube of 4 is 64

def

square of 2 is :4

The cube of 4 is 64

return

square of 2 is :4

The cube of 4 is 64

square of 2 is :4

The cube of 4 is 64

def # Python program to illustrate functions 0

# Python program to illustrate functions 2

# Python program to illustrate functions 4_______0_______8 # Python program to illustrate functions 6# Python program to illustrate functions 7# Python program to illustrate functions 8

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

2# can be treated as objects 1

square of 2 is :4

The cube of 4 is 64

# can be treated as objects 3

# can be treated as objects 4

đầu ra

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

chức năng bao bọc

Hàm trình bao bọc hoặc trình trang trí cho phép chúng ta bao bọc một hàm khác để mở rộng hành vi của hàm được bao bọc mà không sửa đổi vĩnh viễn nó. Trong Decorators, các hàm được lấy làm đối số cho một hàm khác và sau đó được gọi bên trong hàm bao bọc. Để biết thêm về trang trí bấm vào đây

Dưới đây là ví dụ về một trang trí đơn giản

# can be treated as objects 5

def # can be treated as objects 7

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

def0

def2

def3

def5

def7

def shout(text): 0

shout(text): 1_______0_______2shout(text): 3shout(text): 4# Python program to illustrate functions 8

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

shout(text): 1_______91_______8

shout(text): 1_______92_______0

shout(text): 1_______92_______2

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

shout(text): 1_______0_______2shout(text): 3 7# Python program to illustrate functions 8

return return2

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

return5

def return7

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

2____91_______3

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

01# Python program to illustrate functions 8

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

đầu ra

Hello, this is before function execution
This is inside the function !!
This is after function execution

Hàm bao bọc Lambda

Trong Python, hàm ẩn danh có nghĩa là một hàm không có tên. Như chúng ta đã biết rằng từ khóa def được sử dụng để xác định các hàm thông thường và từ khóa

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

15 được sử dụng để tạo các hàm ẩn danh. Hàm này có thể có bất kỳ số lượng đối số nào nhưng chỉ có một biểu thức, được đánh giá và trả về. Hàm lambda cũng có thể có một hàm khác làm đối số. Ví dụ dưới đây cho thấy một hàm lambda cơ bản trong đó một hàm lambda khác được truyền dưới dạng đối số

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

17_______0_______8

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

square of 2 is :4

The cube of 4 is 64

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

26_______0_______8

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

square of 2 is :4

The cube of 4 is 64

square of 2 is :4

The cube of 4 is 64

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

2shout(text): 3

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

2shout(text): 3

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

HI, I AM CREATED BY A FUNCTION PASSED AS AN ARGUMENT.
hi, i am created by a function passed as an argument.

Python truyền biến cho hàm như thế nào?

Python chuyển đối số bằng cách gán. Nghĩa là, khi bạn gọi một hàm Python, mỗi đối số của hàm sẽ trở thành một biến mà giá trị được truyền vào được gán. .

Nếu một đối tượng đại diện cho giá trị 2 đã tồn tại, thì nó sẽ được truy xuất. .

Bộ đếm tham chiếu của đối tượng này được tăng lên

Bạn có thể chuyển một biến vào một hàm không?

Tham số của hàm là tham chiếu đến đối tượng, được truyền theo giá trị. Khi bạn truyền một biến cho một hàm, python sẽ chuyển tham chiếu đến đối tượng mà biến tham chiếu tới (giá trị) . Không phải bản thân biến. Các hàm có một bảng biến cục bộ được gọi là không gian tên cục bộ.