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Python string hexdigits

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In simple words, it is a sequence of hexadecimal digits, i.e. it is a combination of the digits 0-9 and the characters A-F and a-f. In Python3, string.hexdigits is a pre-initialized string used as string constant. In Python, string.hexdigits will give the hexadecimal letters ‘0123456789abcdefABCDEF’.

Syntax: string.hexdigits

Syntax : string.hexdigits

Parameters : Doesn’t take any parameter, since it’s not a function.

Returns : Return all hexadecimal digit letters.

Also note that this is not a function and therefore no parameters will be fetched.

  • Importing a random module and module string to use their respective operations.
  • Then we ask the user for the length of the password he needs.
  • Use string.hexdigits to generate a hexadecimal string.
  • The random.choice () function to select any character from the string generated by the string.hexdigits operation,
  • We use join () to join the elements of an array and convert them to a string using the map function

Example #1

def api_config():
    """Request API config from user and set"""
    code, hash_value = DIALOG.inputbox("Enter your API Hash")
    if code == DIALOG.OK:
        if len(hash_value) != 32 or any(it not in string.hexdigits for it in hash_value):
            DIALOG.msgbox("Invalid hash")
            return
        string1 = "HASH = "" + hash_value + """
        code, id_value = DIALOG.inputbox("Enter your API ID")
        if not id_value or any(it not in string.digits for it in id_value):
            DIALOG.msgbox("Invalid ID")
            return
        string2 = "ID = "" + id_value + """
        with open(os.path.join(utils.get_base_dir(), "api_token.py"), "w") as file:
            file.write(string1 + "
" + string2 + "
")
        DIALOG.msgbox("API Token and ID set.") 

Example #2

def isHex(val: str) -> bool:
    """
    Return whether the given str represents a hex value or not

    :param val: the string to check
    :return: whether the given str represents a hex value
    """
    if isinstance(val, bytes):
        # only decodes utf-8 string
        try:
            val = val.decode()
        except ValueError:
            return False
    return isinstance(val, str) and all(c in string.hexdigits for c in val)

# decorator 

Example #3

def s_hexlit(s, t):
  if s.peek(2, True) != ’0x’:
    return False

  s.get()
  s.get()

  lit = ""
  while not s.empty() and s.peek() in string.hexdigits:
    lit += s.get()

  if not lit:
    return False

  t.append(int(lit, 16))
  return True 

Example #4

def s_hexlit(s, t):
  if s.peek(2, True) != ’0x’:
    return False

  s.get()
  s.get()

  lit = ""
  while not s.empty() and s.peek() in string.hexdigits:
    lit += s.get()

  if not lit:
    return False

  t.append((TokenTypes.LITERAL_INT, int(lit, 16)))
  return True 

Example #5

def post(self, digest):
        """
        Create a running instance from the container image digest
        """
        # Containers are mapped to teams
        user_account = api.user.get_user()
        tid = user_account[’tid’]

        # fail fast on invalid requests
        if any(char not in string.hexdigits + "sha:" for char in digest):
            raise PicoException("Invalid image digest", 400)

        # Create the container
        result = api.docker.create(tid, digest)

        return jsonify({"success": result[’success’], "message": result[’message’]}) 

Archived version

In Python3 string.hexdigits — it is a pre-initialized string used as a string constant. In Python, string.hexdigits will output the hexadecimal letters "0123456789abcdefABCDEF".

Syntax: string.hexdigits

Parameters: Doesn’t take any parameter, since it’s not a function.

Returns: Return all hexadecimal digit letters.

Note. Make sure to import the string library function to use string.hexdigits.

Code # 1:

# import string library function

import string 

 
# Store the value as a result of a variable

result = string.hexdigits 

  
# Print value

print (result) 

Output:

 0123456789abcdefABCDEF 

Code # 2: This code checks if the string input contains only hexadecimal digits

# import string library function

import string 

 
# The function checks if the input string is
# has only hexadecimal numbers or not

def check (value): 

fo r letter in value: 

 

# If anything other than hexdigit

# email is present, then return

# False, otherwise return True

if letter not in string.hexdigits: 

return False

return True

 
Driver code

input1 = "0123456789abcdef"

print (input1, "-" " , check (input1)) 

  

input2 = "abcdefABCDEF"

print (input2, "-"" , check (input2)) 

  

input3 = "abcdefghGEEK"

print (input3, "-"" , check (input3)) 

Exit:

 0123456789abcdef -" True abcdefABCDEF -" True abcdefghGEEK -" False 

Applications:
The string constant hexdigits can used in many practical applications ... Let’s see some code explaining how to use numbers to generate strong random passwords of a given size.

# Import random ones to generate
# random sequence of lines

import random 

 
# Import string library function

import string 

  

def rand_pass (size): 

 

# Takes a random selection from

  # strin g.hexdigits

generate_pass = ’’ .join ([random.choice (string.hexdigits) 

for n in range (size)]) 

 

  return generate_pass 

  
Driver code

password = rand_pass ( 10

print (password) 

Output:

 e497FEe2bC 

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