Python binary string to text

How to Convert ‘Binary String’ to Normal String in Python3

How to convert ‘binary string’ to normal string in Python3?

>>> b'a string'.decode('ascii')
'a string'

To get bytes from string, encode it.

>>> 'a string'.encode('ascii')
b'a string'

How to convert a binary String to Original String

str_data='Hi'
binarystr = ''.join(format(ord(x),'b') for x in str_data)
String=''
for i in range(0,len(binarystr),7): 
String+=chr(int(binarystr[i:i+7],2))
print(String)

Binary to String/Text in Python

It looks like you are trying to decode ASCII characters from a binary string representation (bit string) of each character.

You can take each block of eight characters (a byte), convert that to an integer, and then convert that to a character with chr() :

>>> X = "0110100001101001"
>>> print(chr(int(X[:8], 2)))
h
>>> print(chr(int(X[8:], 2)))
i

Assuming that the values encoded in the string are ASCII this will give you the characters. You can generalise it like this:

def decode_binary_string(s): 
return ''.join(chr(int(s[i*8:i*8+8],2)) for i in range(len(s)//8))

>>> decode_binary_string(X)
hi

If you want to keep it in the original encoding you don’t need to decode any further. Usually you would convert the incoming string into a Python unicode string and that can be done like this (Python 2):

def decode_binary_string(s, encoding='UTF-8'): 
byte_string = ''.join(chr(int(s[i*8:i*8+8],2)) for i in range(len(s)//8)) 
return byte_string.decode(encoding)

Converting binary to string

You need to set the base for int :

''.join(chr(int(val, 2)) for val in res.split(' '))

Convert base-2 binary number string to int

You use the built-in int() function, and pass it the base of the input number, i.e. 2 for a binary number:

Here is documentation for Python 2, and for Python 3.

Binary data gets written as string literal — how to convert it back to bytes?

Assuming type str for your original string, you have the following raw string (literal length 4 escape codes not an actual escape code representing 1 byte):

s = r"b'x\x9c\xabV*HL\xd1\xcd\xccK\xcbW\xb2RPJ\xcb\xcfOJ,R\xaa\x05\x00T\x83\x07b'"

If you remove the leading b’ and ‘ , you can use the latin1 encoding to convert to bytes. latin1 is a 1:1 mapping of Unicode code points to byte values, because the first 256 Unicode code points represent the latin1 character set:

>>> s[2:-1].encode('latin1')
b'x\\x9c\\xabV*HL\\xd1\\xcd\\xccK\\xcbW\\xb2RPJ\\xcb\\xcfOJ,R\\xaa\\x05\\x00T\\x83\\x07b'

This is now a byte string, but contains literal escape codes. Now apply the unicode_escape encoding to translate back to a str of the actual code points:

>>> s2 = b.decode('unicode_escape')
>>> s2
'x\x9c«V*HLÑÍÌKËW²RPJËÏOJ,Rª\x05\x00T\x83\x07b'

This is now a Unicode string, with code points, but we still need a byte string. Encode with latin1 again:

>>> b2 = s2.encode('latin1')
>>> b2
b'x\x9c\xabV*HL\xd1\xcd\xccK\xcbW\xb2RPJ\xcb\xcfOJ,R\xaa\x05\x00T\x83\x07b'

>>> s = r"b'x\x9c\xabV*HL\xd1\xcd\xccK\xcbW\xb2RPJ\xcb\xcfOJ,R\xaa\x05\x00T\x83\x07b'"
>>> b = s[2:-1].encode('latin1').decode('unicode_escape').encode('latin1')
>>> b
b'x\x9c\xabV*HL\xd1\xcd\xccK\xcbW\xb2RPJ\xcb\xcfOJ,R\xaa\x05\x00T\x83\x07b'

It appears this sample data is a zlib-compressed JSON string:

>>> import zlib,json
>>> json.loads(zlib.decompress(b))

Convert bytes to a string

Decode the bytes object to produce a string:

The above example assumes that the bytes object is in UTF-8, because it is a common encoding. However, you should use the encoding your data is actually in!

Python: Converting a Binary String to a Text File

You need some way of identifying character borders. If you limit this to a set bit length — like only 8-bit, you can pad the binary and then you’ll know the character size. If you don’t want to do this you need some other way.

Here is a method that doesn’t care about the input — it handles spaces, emojis, etc. It does this by separating the characters in the binary with a space:

test_str original:")
print(test_str)

print("\nThe string after Binary conversion : \n" + Binary)

text = "".join(chr(int(s, 2)) for s in Binary.split())
print(f'\nString after conversion back to text:\n')

Dies ist eine binäre Übersetzung. /p>

The string after Binary conversion :

1000100 1101001 1100101 1110011
100000 1101001 1110011 1110100 100000 1100101 1101001 1101110 1100101
100000 1100010 1101001 1101110 11100100 1110010 1100101 100000
11011100 1100010 1100101 1110010 1110011 1100101 1110100 1111010
1110101 1101110 1100111 101110 100000 11111010000111011

String after conversion back to text:

Dies ist eine binäre Übersetzung. /p>

Notice the last character for the emoji and how long the binary is. That could be a bear emoji or a couple ascii characters. Without a separator, there’s now way to know.

Источник

How to convert binary string to and from ascii text in python

In this tutorial, we will see How to convert any binary string to and from ASCII text in Python. ASCII stands for American Standard Code For Information Interchange. It is a standard 8-bit encoding format which assigns numerical values to other characters in computer such as letters, punctuation marks etc.

The ASCII value of ‘K’ is 75. You can check the ASCII value of different characters by executing the code given below. It takes an input character from the user and displays its ASCII value using ord() function.

# Program to find the ASCII value of the given character char = str(input("Enter any character: ")) print("The ASCII value of '" + char + "' is", ord(char))

Enter any character: a The ASCII value of 'a' is 97

The ord() function only works for a character. If you want to obtain ASCII value of all characters in a string then use for loop to access all elements one by one. Convert them into ascii using ord() function and append the value in another variable.

Computers store data in the form of binary numbers i.e. 1’s and 0’s. Suppose you want to perform some operations or manipulate a string which is stored in the computer memory. For this, you need to convert this binary string to ASCII value to retrieve the original string. This article discusses different ways to convert a binary string into ASCII value using Python language. If you want to learn more about Python Programming, visit Python Programming Tutorials.

the common ways to convert binary strings to and from ASCII text in Python are:

1. Use the binascii module to convert Binary String to ASCII
2. BinaryStringto ASCII using Int.to_bytes() function
3. ASCII to Binary String using Int.from_bytes() function

Converting binary string or text to ASCII using binascii module

Binascii module aid in conversion of binary string to their equivalent ASCII representation. First of all, import the library of binascii and then take binary string as an input from the user. You can also convert a string to binary representation by inserting “b” at the start of an input string. b2a.uu() is a binascii function which converts the binary string to ascii representation.

import binascii # Initializing a binary string Text = b"This is my string" # Calling the b2a_uu() function to # Convert the binary string to ascii ASCII = binascii.b2a_uu(Text) # Getting the ASCII equivalent print(ASCII)

Converting binary String to ASCII using int.to_ byte() function

First step is to initialize a binary string using int(binary_input, base) command. Pass the string of 0s and 1s in the first argument and base of the number system in second argument. Before moving towards coding, lets first understand how a binary string composed of bits of 0s and 1s is converted into an ASCII value. You already know eight bits are equal to 1 byte. Suppose you have an binary string as shown below. In order to find ascii value, we have first grouped 8 bits. A group of 8 bits represent 1 byte which represents 1 charachter.

First step is to find the number of bytes in a binary string which is done using (input_string.bit_length() +7) // 8 command. Here, input_string.bit_length() returns the total number of bits in an input string. After this, convert it into ASCII text using decoder() function. The complete code is given below.

# Initialize a binary string input_string=int("0100100001100101011011000110110001101111", 2); #Obtain the total number of bytes Total_bytes= (input_string.bit_length() +7) // 8 #Convert these bits to bytes input_array = input_string.to_bytes(Total_bytes, "big") #Convert the bytes to an ASCII value and display it on the output screen ASCII_value=input_array.decode() print(ASCII_value)

Converting ASCII to Binary Text using Int.from_bytes() function

The above two methods were related to the conversion of binary to ASCII. In this method, we will learn to convert ASCII to Binary. For this, convert the string into an array using string.encode() function. Then call the function int.from_byte() to convert the array of bytes into binary integer which is then passed to bin() function to obtain a binary string of 0s nd 1s..

input_array = "Hello".encode() binary_array= int.from_bytes(input_array, "big") output_string = bin(binary_array) print(output_string)

0b100100001100101011011000110110001101111

This tutorial is all about conversion of binary from ASCII and vice versa. Similarly, you can also convert other number systems such as decimal numbers, hexadecimal numbers into binary numbers and vice versa. If you have any feedback about this article, do let us know. To learn more about python language, visit this link.

Related Posts:

Источник