Tutoriel de base Python

Contrôle de flux Python

La méthode bytes() retourne un objet byte immutable, initialisé avec la taille et les données données.

La syntaxe de la méthode bytes() est :

bytes([source[, encoding[, errors]]])

la méthode bytes() retourne un objet bytes, qui est une séquence d'entiers non modifiables (ne peut pas être modifié) dans l'intervalle 0 <= x <256。

Pour utiliser la version variable, veuillez utiliserbytearray()Method.

bytes() has three optional parameters:

source (optional) -The array used to initialize bytes from the source.
encoding (optional) -If the source is a string, it is the encoding of the string.
errors (optional) -If the source is a string, the action taken when the encoding conversion fails (more information:)String encoding)

The source parameter can be used to initialize the byte array as follows:

Different source parameters
Type	Description
String	When using str.encode() to convert a string to bytes, it must also provideEncoding　and optionalError
Integer	Create an array that provides size, and all arrays are initialized to null
Object	The read-only buffer of the object will be used to initialize the byte array
Iterable	Create an array of size equal to the count of the iterable, and initialize it with the elements of the iterable. It must be 0 <= x <256Integer iterable between
No source (arguments)	Create an array of size 0

The bytes() method returns a bytes object with the given size and initial value.

Example

string = "Python is interesting."
# Encoding as “utf-8” string
arr = bytes(string, 'utf-8)
print(arr)

When running the program, the output is:

b'Python is interesting.'

Example

size =　5
arr = bytes(size)
print(arr)

When running the program, the output is:

b'\x00\x00\x00\x00\x00'

Example

rList = [1,　2,　3,　4,　5]
arr = bytes(rList)
print(arr)

When running the program, the output is:

b'\x01\x02\x03\x04\x05'