import os, json, time
import litellm
from litellm.utils import ModelResponse
import requests, threading
from typing import Optional, Union, Literal
class BudgetManager:
def __init__(self, project_name: str, client_type: str = "local", api_base: Optional[str] = None):
self.client_type = client_type
self.project_name = project_name
self.api_base = api_base or "https://api.litellm.ai"
## load the data or init the initial dictionaries
self.load_data()
def print_verbose(self, print_statement):
if litellm.set_verbose:
import logging
logging.info(print_statement)
def load_data(self):
if self.client_type == "local":
# Check if user dict file exists
if os.path.isfile("user_cost.json"):
# Load the user dict
with open("user_cost.json", 'r') as json_file:
self.user_dict = json.load(json_file)
else:
self.print_verbose("User Dictionary not found!")
self.user_dict = {}
self.print_verbose(f"user dict from local: {self.user_dict}")
elif self.client_type == "hosted":
# Load the user_dict from hosted db
url = self.api_base + "/get_budget"
headers = {'Content-Type': 'application/json'}
data = {
'project_name' : self.project_name
}
response = requests.post(url, headers=headers, json=data)
response = response.json()
if response["status"] == "error":
self.user_dict = {} # assume this means the user dict hasn't been stored yet
else:
self.user_dict = response["data"]
def create_budget(self, total_budget: float, user: str, duration: Optional[Literal["daily", "weekly", "monthly", "yearly"]] = None, created_at: float = time.time()):
self.user_dict[user] = {"total_budget": total_budget}
if duration is None:
return self.user_dict[user]
if duration == 'daily':
duration_in_days = 1
elif duration == 'weekly':
duration_in_days = 7
elif duration == 'monthly':
duration_in_days = 28
elif duration == 'yearly':
duration_in_days = 365
else:
raise ValueError("""duration needs to be one of ["daily", "weekly", "monthly", "yearly"]""")
self.user_dict[user] = {"total_budget": total_budget, "duration": duration_in_days, "created_at": created_at, "last_updated_at": created_at}
self._save_data_thread() # [Non-Blocking] Update persistent storage without blocking execution
return self.user_dict[user]
def projected_cost(self, model: str, messages: list, user: str):
text = "".join(message["content"] for message in messages)
prompt_tokens = litellm.token_counter(model=model, text=text)
prompt_cost, _ = litellm.cost_per_token(model=model, prompt_tokens=prompt_tokens, completion_tokens=0)
current_cost = self.user_dict[user].get("current_cost", 0)
projected_cost = prompt_cost + current_cost
return projected_cost
def get_total_budget(self, user: str):
return self.user_dict[user]["total_budget"]
def update_cost(self, user: str, completion_obj: Optional[ModelResponse] = None, model: Optional[str] = None, input_text: Optional[str] = None, output_text: Optional[str] = None):
if model and input_text and output_text:
prompt_tokens = litellm.token_counter(model=model, messages=[{"role": "user", "content": input_text}])
completion_tokens = litellm.token_counter(model=model, messages=[{"role": "user", "content": output_text}])
prompt_tokens_cost_usd_dollar, completion_tokens_cost_usd_dollar = litellm.cost_per_token(model=model, prompt_tokens=prompt_tokens, completion_tokens=completion_tokens)
cost = prompt_tokens_cost_usd_dollar + completion_tokens_cost_usd_dollar
elif completion_obj:
cost = litellm.completion_cost(completion_response=completion_obj)
model = completion_obj['model'] # if this throws an error try, model = completion_obj['model']
else:
raise ValueError("Either a chat completion object or the text response needs to be passed in. Learn more - https://docs.litellm.ai/docs/budget_manager")
self.user_dict[user]["current_cost"] = cost + self.user_dict[user].get("current_cost", 0)
if "model_cost" in self.user_dict[user]:
self.user_dict[user]["model_cost"][model] = cost + self.user_dict[user]["model_cost"].get(model, 0)
else:
self.user_dict[user]["model_cost"] = {model: cost}
self._save_data_thread() # [Non-Blocking] Update persistent storage without blocking execution
return {"user": self.user_dict[user]}
def get_current_cost(self, user):
return self.user_dict[user].get("current_cost", 0)
def get_model_cost(self, user):
return self.user_dict[user].get("model_cost", 0)
def is_valid_user(self, user: str) -> bool:
return user in self.user_dict
def get_users(self):
return list(self.user_dict.keys())
def reset_cost(self, user):
self.user_dict[user]["current_cost"] = 0
self.user_dict[user]["model_cost"] = {}
return {"user": self.user_dict[user]}
def reset_on_duration(self, user: str):
# Get current and creation time
last_updated_at = self.user_dict[user]["last_updated_at"]
current_time = time.time()
# Convert duration from days to seconds
duration_in_seconds = self.user_dict[user]["duration"] * 24 * 60 * 60
# Check if duration has elapsed
if current_time - last_updated_at >= duration_in_seconds:
# Reset cost if duration has elapsed and update the creation time
self.reset_cost(user)
self.user_dict[user]["last_updated_at"] = current_time
self._save_data_thread() # Save the data
def update_budget_all_users(self):
for user in self.get_users():
if "duration" in self.user_dict[user]:
self.reset_on_duration(user)
def _save_data_thread(self):
thread = threading.Thread(target=self.save_data) # [Non-Blocking]: saves data without blocking execution
thread.start()
def save_data(self):
if self.client_type == "local":
import json
# save the user dict
with open("user_cost.json", 'w') as json_file:
json.dump(self.user_dict, json_file, indent=4) # Indent for pretty formatting
return {"status": "success"}
elif self.client_type == "hosted":
url = self.api_base + "/set_budget"
headers = {'Content-Type': 'application/json'}
data = {
'project_name' : self.project_name,
"user_dict": self.user_dict
}
response = requests.post(url, headers=headers, json=data)
response = response.json()
return response