parameters: (passphrase=None, algorithm='sha1')
return_statement: return ':'.join((algorithm, salt, h.hexdigest()))
docstring: Generate hashed password and salt for use in notebook configuration.
  
      In the notebook configuration, set `c.NotebookApp.password` to
      the generated string.
  
      Parameters
      ----------
      passphrase : str
          Password to hash.  If unspecified, the user is asked to input
          and verify a password.
      algorithm : str
          Hashing algorithm to use (e.g, 'sha1' or any argument supported
          by :func:`hashlib.new`).
  
      Returns
      -------
      hashed_passphrase : str
          Hashed password, in the format 'hash_algorithm:salt:passphrase_hash'.
  
      Examples
      --------
      >>> passwd('mypassword')
      'sha1:7cf3:b7d6da294ea9592a9480c8f52e63cd42cfb9dd12'
docstring_summary: Generate hashed password and salt for use in notebook configuration.
docstring_tokens: Generate hashed password and salt for use in notebook configuration .
function: def passwd(passphrase=None, algorithm='sha1'):
      """Generate hashed password and salt for use in notebook configuration.
  
      In the notebook configuration, set `c.NotebookApp.password` to
      the generated string.
  
      Parameters
      ----------
      passphrase : str
          Password to hash.  If unspecified, the user is asked to input
          and verify a password.
      algorithm : str
          Hashing algorithm to use (e.g, 'sha1' or any argument supported
          by :func:`hashlib.new`).
  
      Returns
      -------
      hashed_passphrase : str
          Hashed password, in the format 'hash_algorithm:salt:passphrase_hash'.
  
      Examples
      --------
      >>> passwd('mypassword')
      'sha1:7cf3:b7d6da294ea9592a9480c8f52e63cd42cfb9dd12'
  
      """
      if passphrase is None:
          for i in range(3):
              p0 = getpass.getpass('Enter password: ')
              p1 = getpass.getpass('Verify password: ')
              if p0 == p1:
                  passphrase = p0
                  break
              else:
                  print('Passwords do not match.')
          else:
              raise UsageError('No matching passwords found. Giving up.')
  
      h = hashlib.new(algorithm)
      salt = ('%0' + str(salt_len) + 'x') % random.getrandbits(4 * salt_len)
      h.update(encode(passphrase, 'utf-8') + encode(salt, 'ascii'))
  
      return ':'.join((algorithm, salt, h.hexdigest()))
function_tokens: def passwd ( passphrase = None , algorithm = 'sha1' ) : if passphrase is None : for i in range ( 3 ) : p0 = getpass . getpass ( 'Enter password: ' ) p1 = getpass . getpass ( 'Verify password: ' ) if p0 == p1 : passphrase = p0 break else : print ( 'Passwords do not match.' ) else : raise UsageError ( 'No matching passwords found. Giving up.' ) h = hashlib . new ( algorithm ) salt = ( '%0' + str ( salt_len ) + 'x' ) % random . getrandbits ( 4 * salt_len ) h . update ( encode ( passphrase , 'utf-8' ) + encode ( salt , 'ascii' ) ) return ':' . join ( ( algorithm , salt , h . hexdigest ( ) ) )