Hướng dẫn python compare byte arrays
I am trying to compare two byte arrays in Python. Show
This is my code
and this is the output:
It is clear that they are equal but the function is returning false. Why is this? The byte streams are generated using
mkrieger1 15.6k4 gold badges45 silver badges57 bronze badges asked Apr 15 at 12:31
3 Their Types could be different.Also I recommend you to use
instead
compare
if it won't work, convert to string and strip them.
answered Apr 15 at 12:40
1 Python supports a range of types to store sequences. There are six sequence types: strings, byte sequences (bytes objects), byte arrays (bytearray objects), lists, tuples, and range objects. Nội dung chính Strings contain Unicode characters. Their literals are written in single or double quotes : 'python', "data". Bytes and bytearray objects contain single bytes – the former is immutable while the latter is a mutable sequence. Bytes objects can be constructed the constructor, bytes(), and from literals; use a b prefix with normal string syntax: b'python'. To construct byte arrays, use the bytearray() function. Bytes literalsbytesliteral ::= bytesprefix(shortbytes | longbytes) bytesprefix ::= "b" | "B" | "br" | "Br" | "bR" | "BR" shortbytes ::= "'" shortbytesitem* "'" | '"' shortbytesitem* '"' longbytes ::= "'''" longbytesitem* "'''" | '"""' longbytesitem* '"""' shortbytesitem ::= shortbyteschar | bytesescapeseq longbytesitem ::= longbyteschar | bytesescapeseq shortbyteschar ::= bytes() and bytearray() functionsbytes() function: Return a new "bytes" object, which is an immutable sequence of small integers in the range 0 <= x < 256, print as ASCII characters when displayed. bytes is an immutable version of bytearray – it has the same non-mutating methods and the same indexing and slicing behavior. Syntax: bytes([source[, encoding[, errors]]]) bytearray() function : Return a new array of bytes. The bytearray type is a mutable sequence of integers in the range 0 <= x < 256. It has most of the usual methods of mutable sequences, described in Mutable Sequence Types, as well as most methods that the bytes type has, see Bytes and Byte Array Methods. Syntax: bytearray([source[, encoding[, errors]]]) The optional source parameter can be used to initialize the array in a few different ways:
Without an argument, an array of size 0 is created. Create a bytes object in PythonExample-1 : Code :
Example-2: Code:
Output: b'Python Tutorial,\nJavascript Tutorial,\nMySQL Tutorial' Example-3 : Code :
Output: b'Python, bytes' Convert bytes to stringExample-1: Code:
Output: b'El ni\xc3\xb1o come camar\xc3\xb3n' Example-2: Code:
Output: El niño come camarón Example-3: Code:
Output: b'\xd8\xe1\xb7\xeb\xa8\xe5 \xd2\xb7\xe1' привет мир Convert hex string to bytesExample-1: Code :
Output: 45678c6c56f205876f72c64 Example-2: Code :
Output: b'.\xf0\xf1\xf2' Numeric code representing a character of a bytes object in PythonExample-1: Code:
Output: 109 Example-2: Code:
Output: [80, 121, 116, 104, 111, 110, 32, 98, 121, 116, 101, 115] Define a mapping table characters for use with a bytes object in PythonExample-1: Code:
Output: b'Python mapping table characters' Example-2: Code:
Output:
Example-3: Code:
Output: Writy u Python zunwtion to zinx u xistinwt puir oz numvyrs whosy proxuwt is oxx zrom u syquynwy oz intygyr vuluys. Convert bytes to hex in Python
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Previous: Python break, continue Test your Python skills with w3resource's quiz What are byte arrays in Python?The Python bytearray() function converts strings or collections of integers into a mutable sequence of bytes. It provides developers the usual methods Python affords to both mutable and byte data types. Python's bytearray() built-in allows for high-efficiency manipulation of data in several common situations. What is a byte array?ByteArray is an extremely powerful Class that can be used for many things related to data manipulation, including (but not limited to) saving game data online, encrypting data, compressing data, and converting a BitmapData object to a PNG or JPG file. What is a byte object in Python?Strings and Character Data in Python The bytes object is one of the core built-in types for manipulating binary data. A bytes object is an immutable sequence of single byte values. Each element in a bytes object is a small integer in the range of 0 to 255. What is a byte stream in Python?Byte streams are a sequence of bytes used by programs to input and output information. |