code: def encrypt_file(self, inpath, force_nocompress=False, force_compress=False, armored=False, checksum=False):
          
          if armored:
              if force_compress:
                  command_stub = self.command_maxcompress_armored
              elif force_nocompress:
                  command_stub = self.command_nocompress_armored
              else:
                  if self._is_compress_filetype(inpath):
                      command_stub = self.command_default_armored
                  else:
                      command_stub = self.command_nocompress_armored
          else:
              if force_compress:
                  command_stub = self.command_maxcompress
              elif force_nocompress:
                  command_stub = self.command_nocompress
              else:
                  if self._is_compress_filetype(inpath):
                      command_stub = self.command_default
                  else:
                      command_stub = self.command_nocompress
  
          encrypted_outpath = self._create_outfilepath(inpath)
          system_command = command_stub + encrypted_outpath + " --passphrase " + quote(self.passphrase) + " --symmetric " + quote(inpath)
  
          try:
              response = muterun(system_command)
              # check returned status code
              if response.exitcode == 0:
                  stdout(encrypted_outpath + " was generated from " + inpath)
                  if checksum:  # add a SHA256 hash digest of the encrypted file - requested by user --hash flag in command
                      from crypto.library import hash
                      encrypted_file_hash = hash.generate_hash(encrypted_outpath)
                      if len(encrypted_file_hash) == 64:
                          stdout("SHA256 hash digest for " + encrypted_outpath + " :")
                          stdout(encrypted_file_hash)
                      else:
                          stdout("Unable to generate a SHA256 hash digest for the file " + encrypted_outpath)
              else:
                  stderr(response.stderr, 0)
                  stderr("Encryption failed")
                  sys.exit(1)
          except Exception as e:
              stderr("There was a problem with the execution of gpg. Encryption failed. Error: [" + str(e) + "]")
              sys.exit(1)
docs: public method for single file encryption with optional compression, ASCII armored formatting, and file hash digest generation