<｜begin▁of▁sentence｜>### Instruction:
As a science journalist reporting on a new software tool for terminal formatting called 'TerminalController', I'd like to demonstrate an example usage where bold text is needed. How would you utilize the 'TerminalController' class to format the string 'This is bold text!' with bold ANSI escape codes, assuming your environment supports it?
### Response:
import sys

class TerminalController:
    def __init__(self, term_stream=sys.stdout):
        # Initialize a terminal controller
        self.term_stream = term_stream
        self.is_a_tty = self.term_stream.isatty()
        # ... Other initializations based on the terminal capabilities ...
    
    def render(self, template):
        # Replace $-substitutions with terminal control strings
        # For simplicity, we'll just demonstrate replacing '$BOLD' with an ANSI code
        if self.is_a_tty:
            return template.replace('$BOLD', '\033[1m')
        else:
            return template.replace('$BOLD', '')

# Create a TerminalController instance and use it
term_controller = TerminalController()
formatted_text = term_controller.render('This is $BOLDbold$BOLD text!')
print(formatted_text)
<|EOT|>
