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from typing import *
BACKEND = 'flash_attn'
DEBUG = False
def __from_env():
import os
global BACKEND
global DEBUG
env_attn_backend = os.environ.get('ATTN_BACKEND')
env_sttn_debug = os.environ.get('ATTN_DEBUG')
if env_attn_backend is not None and env_attn_backend in ['xformers', 'flash_attn', 'sdpa', 'naive']:
BACKEND = env_attn_backend
if env_sttn_debug is not None:
DEBUG = env_sttn_debug == '1'
print(f"[ATTENTION] Using backend: {BACKEND}")
__from_env()
def set_backend(backend: Literal['xformers', 'flash_attn']):
global BACKEND
BACKEND = backend
def set_debug(debug: bool):
global DEBUG
DEBUG = debug
from .full_attn import *
from .modules import *
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