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import re
class BasePrompt:
def __init__(self, prompt):
"""
Initializes the BasePrompt object with a prompt template.
:param prompt: A string that can contain placeholders within curly braces
"""
self.prompt = prompt
self._pattern = re.compile(r"\{([^}]+)\}")
def format_prompt(self, **kwargs):
"""
Formats the prompt string using the keyword arguments provided.
:param kwargs: The values to substitute into the prompt string
:return: The formatted prompt string
"""
matches = self._pattern.findall(self.prompt)
return self.prompt.format(**{match: kwargs.get(match, "") for match in matches})
def get_input_variables(self):
"""
Gets the list of input variable names from the prompt string.
:return: List of input variable names
"""
return self._pattern.findall(self.prompt)
class RolePrompt(BasePrompt):
def __init__(self, prompt, role: str):
"""
Initializes the RolePrompt object with a prompt template and a role.
:param prompt: A string that can contain placeholders within curly braces
:param role: The role for the message ('system', 'user', or 'assistant')
"""
super().__init__(prompt)
self.role = role
def create_message(self, **kwargs):
"""
Creates a message dictionary with a role and a formatted message.
:param kwargs: The values to substitute into the prompt string
:return: Dictionary containing the role and the formatted message
"""
return {"role": self.role, "content": self.format_prompt(**kwargs)}
class SystemRolePrompt(RolePrompt):
def __init__(self, prompt: str):
super().__init__(prompt, "system")
class UserRolePrompt(RolePrompt):
def __init__(self, prompt: str):
super().__init__(prompt, "user")
class AssistantRolePrompt(RolePrompt):
def __init__(self, prompt: str):
super().__init__(prompt, "assistant")
if __name__ == "__main__":
prompt = BasePrompt("Hello {name}, you are {age} years old")
print(prompt.format_prompt(name="John", age=30))
prompt = SystemRolePrompt("Hello {name}, you are {age} years old")
print(prompt.create_message(name="John", age=30))
print(prompt.get_input_variables())
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