Remove unused code, switch to warnings

bitsandbytes/__main__.py

@@ -3,8 +3,9 @@
 # cli()
 import os
 import sys
-import torch
+from warnings import warn
 
+import torch
 
 HEADER_WIDTH = 60
 
@@ -32,8 +33,6 @@ def print_debug_info() -> None:
 from . import COMPILED_WITH_CUDA, PACKAGE_GITHUB_URL
 from .cuda_setup.main import get_compute_capabilities, get_cuda_lib_handle
 from .cuda_setup.env_vars import to_be_ignored
-from .utils import print_stderr
-
 
 print_header("POTENTIALLY LIBRARY-PATH-LIKE ENV VARS")
 for k, v in os.environ.items():
@@ -84,7 +83,7 @@ def print_debug_info() -> None:
 
 except ImportError:
     print()
-    print_stderr(
+    warn(
         f"WARNING: {__package__} is currently running as CPU-only!\n"
         "Therefore, 8-bit optimizers and GPU quantization are unavailable.\n\n"
         f"If you think that this is so erroneously,\nplease report an issue!"

bitsandbytes/autograd/_functions.py

@@ -1,6 +1,5 @@
 import operator
 import torch
-import bitsandbytes as bnb
 import bitsandbytes.functional as F
 
 from dataclasses import dataclass
@@ -378,9 +377,6 @@ def backward(ctx, grad_output):
         return grad_A, grad_B, None, grad_bias, None
 
 
-matmul = MatMul8bitLt.apply
-
-
 def matmul(
     A: tensor,
     B: tensor,

bitsandbytes/cuda_setup/main.py

@@ -17,10 +17,7 @@
 """
 
 import ctypes
-import torch
-from pathlib import Path
 
-from ..utils import execute_and_return
 from .paths import determine_cuda_runtime_lib_path
 
 
@@ -81,7 +78,6 @@ def get_compute_capabilities(cuda):
     cc_major = ctypes.c_int()
     cc_minor = ctypes.c_int()
 
-    result = ctypes.c_int()
     device = ctypes.c_int()
 
     check_cuda_result(cuda, cuda.cuDeviceGetCount(ctypes.byref(nGpus)))

bitsandbytes/cuda_setup/paths.py

@@ -2,23 +2,11 @@
 from typing import Set, Union
 from warnings import warn
 
-from ..utils import print_stderr
 from .env_vars import get_potentially_lib_path_containing_env_vars
 
-
 CUDA_RUNTIME_LIB: str = "libcudart.so"
 
 
-def purge_unwanted_semicolon(tentative_path: Path) -> Path:
-    """
-    Special function to handle the following exception:
-    __LMOD_REF_COUNT_PATH=/sw/cuda/11.6.2/bin:2;/mmfs1/home/dettmers/git/sched/bin:1;/mmfs1/home/dettmers/data/anaconda3/bin:1;/mmfs1/home/dettmers/data/anaconda3/condabin:1;/mmfs1/home/dettmers/.local/bin:1;/mmfs1/home/dettmers/bin:1;/usr/local/bin:1;/usr/bin:1;/usr/local/sbin:1;/usr/sbin:1;/mmfs1/home/dettmers/.fzf/bin:1;/mmfs1/home/dettmers/data/local/cuda-11.4/bin:1
-    """
-    # if ';' in str(tentative_path):
-    #     path_as_str, _ = str(tentative_path).split(';')
-    pass
-
-
 def extract_candidate_paths(paths_list_candidate: str) -> Set[Path]:
     return {Path(ld_path) for ld_path in paths_list_candidate.split(":") if ld_path}
 
@@ -29,7 +17,7 @@ def remove_non_existent_dirs(candidate_paths: Set[Path]) -> Set[Path]:
     }
 
     if non_existent_directories:
-        print_stderr(
+        warn(
             "WARNING: The following directories listed in your path were found to "
             f"be non-existent: {non_existent_directories}"
         )
@@ -117,8 +105,6 @@ def determine_cuda_runtime_lib_path() -> Union[Path, None]:
         if env_var not in {"CONDA_PREFIX", "LD_LIBRARY_PATH"}
     }
 
-
-
     cuda_runtime_libs = set()
     for env_var, value in remaining_candidate_env_vars.items():
         cuda_runtime_libs.update(find_cuda_lib_in(value))

bitsandbytes/functional.py

@@ -5,7 +5,6 @@
 import ctypes as ct
 import operator
 import random
-import math
 import torch
 
 from typing import Tuple
@@ -243,23 +242,6 @@ def get_transform_func(dtype, orderA, orderOut, transpose=False):
         return getattr(lib, name)
 
 
-class GlobalData(object):
-    _instance = None
-
-    def __init__(self):
-        raise RuntimeError("Call get_instance() instead")
-
-    def initialize(self):
-        self.data = {}
-
-    @classmethod
-    def get_instance(cls):
-        if cls._instance is None:
-            cls._instance = cls.__new__(cls)
-            cls._instance.initialize()
-        return cls._instance
-
-
 def get_transform_buffer(
     shape, dtype, device, to_order, from_order="row", transpose=False
 ):

bitsandbytes/utils.py

@@ -1,6 +1,5 @@
 import shlex
 import subprocess
-import sys
 from typing import Tuple
 
 
@@ -22,11 +21,3 @@ def execute_and_return_decoded_std_streams(command_string):
 
     std_out, std_err = execute_and_return_decoded_std_streams(command_string)
     return std_out, std_err
-
-
-def print_stderr(s: str) -> None:
-    print(s, file=sys.stderr)
-
-
-def warn_of_missing_prerequisite(s: str) -> None:
-    print_stderr("WARNING, missing pre-requisite: " + s)