[LLM] Add LLM pep8 coding style checking (#8233)

* add LLM pep8 coding checking

* resolve bugs in testing scripts and code style revision

python/llm/dev/test/lint-python

@@ -0,0 +1,72 @@
+#!/usr/bin/env bash
+
+#
+# Copyright 2016 The BigDL Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+# Originally from Spark
+SCRIPT_DIR="$( cd "$( dirname "$0" )" && pwd )"
+PYTHON_ROOT_DIR="$SCRIPT_DIR/.."
+echo $PYTHON_ROOT_DIR
+PATHS_TO_CHECK="$SCRIPT_DIR/../../src"
+PEP8_REPORT_PATH="$PYTHON_ROOT_DIR/test/pep8-report.txt"
+PYLINT_REPORT_PATH="$PYTHON_ROOT_DIR/test/pylint-report.txt"
+PYLINT_INSTALL_INFO="$PYTHON_ROOT_DIR/test/pylint-info.txt"
+SPHINXBUILD=${SPHINXBUILD:=sphinx-build}
+SPHINX_REPORT_PATH="$PYTHON_ROOT_DIR/test/sphinx-report.txt"
+
+cd "$PYTHON_ROOT_DIR"
+
+# compileall: https://docs.python.org/2/library/compileall.html
+python -B -m compileall -q -l $PATHS_TO_CHECK > "$PEP8_REPORT_PATH"
+compile_status="${PIPESTATUS[0]}"
+
+PEP8_VERSION="1.7.0"
+PEP8_SCRIPT_PATH="$PYTHON_ROOT_DIR/test/pep8-$PEP8_VERSION.py"
+PEP8_SCRIPT_REMOTE_PATH="https://raw.githubusercontent.com/jcrocholl/pep8/$PEP8_VERSION/pep8.py"
+
+echo "PEP8_SCRIPT_PATH" "$PEP8_SCRIPT_PATH"
+
+# Easy install pylint in /dev/pylint. To easy_install into a directory, the PYTHONPATH should
+# be set to the directory.
+# dev/pylint should be appended to the PATH variable as well.
+# Jenkins by default installs the pylint3 version, so for now this just checks the code quality
+# of python3.
+export "PYTHONPATH=$PYTHON_ROOT_DIR/pylint"
+export "PYLINT_HOME=$PYTHONPATH"
+export "PATH=$PYTHONPATH:$PATH"
+
+# There is no need to write this output to a file
+#+ first, but we do so so that the check status can
+#+ be output before the report, like with the
+#+ scalastyle and RAT checks.
+python "$PEP8_SCRIPT_PATH" --ignore=E402,E731,E241,W503,E226 --exclude=__init__.py,log4Error.py --config=dev/tox.ini $PATHS_TO_CHECK >> "$PEP8_REPORT_PATH"
+pep8_status="${PIPESTATUS[0]}"
+
+if [ "$compile_status" -eq 0 -a "$pep8_status" -eq 0 ]; then
+    lint_status=0
+else
+    lint_status=1
+fi
+
+if [ "$lint_status" -ne 0 ]; then
+    echo "PEP8 checks failed."
+    cat "$PEP8_REPORT_PATH"
+    rm "$PEP8_REPORT_PATH"
+    exit "$lint_status"
+else
+    echo "PEP8 checks passed."
+    rm "$PEP8_REPORT_PATH"
+fi

python/llm/src/bigdl/llm/ggml/quantize.py

@@ -38,15 +38,17 @@ _quantize_type = {"llama": _llama_quantize_type,
                   "bloomz": _bloomz_quantize_type,
                   "gptneox": _gptneox_quantize_type}
 
-_valid_types = set(list(_llama_quantize_type.keys()) + list(_bloomz_quantize_type.keys()) + list(_gptneox_quantize_type.keys()))
+_valid_types = set(list(_llama_quantize_type.keys()) + list(_bloomz_quantize_type.keys()) +
+                   list(_gptneox_quantize_type.keys()))
 
 
-def quantize(input_path: str, output_path: str=None, model_family: str = 'llama', dtype: str='q4_0'):
+def quantize(input_path: str, output_path: str=None,
+             model_family: str = 'llama', dtype: str='q4_0'):
     """
     Quantize ggml file to lower precision.
 
     :param input_path: Path of input ggml file, for example `./ggml-model-f16.bin`.
-    :param output_path: Save path of output quantized model. Default to `None`. 
+    :param output_path: Save path of output quantized model. Default to `None`.
             If you don't specify this parameter, quantized model will be saved in
             the same directory as the input and just replace precision with quantize_type
             like `./ggml-model-q4_0.bin`.
@@ -60,7 +62,8 @@ def quantize(input_path: str, output_path: str=None, model_family: str = 'llama'
             gptneox : "q4_0", "q4_1", "q4_2", "q5_0", "q5_1", "q8_0"
     """
     invalidInputError(model_family in ['llama', 'bloomz', 'gptneox'],
-                      "Now we only support quantization of model family('llama', 'bloomz', 'gptneox')",
+                      "Now we only support quantization of model \
+                       family('llama', 'bloomz', 'gptneox')",
                       "{} is not in the list.".format(model_family))
     invalidInputError(os.path.isfile(input_path),
                       "The file {} was not found".format(input_path))
@@ -69,11 +72,11 @@ def quantize(input_path: str, output_path: str=None, model_family: str = 'llama'
         output_path = input_path.replace("f16", dtype)
     # convert quantize type str into corresponding int value
     quantize_type_map = _quantize_type[model_family]
-    invalidInputError(dtype in quantize_type_map,
-                      "{0} model just accept {1} now, but you pass in {2}.".format(
-                        model_family,
-                        list(quantize_type_map.keys()),
-                        dtype))
+    invalidInputError(dtype in quantize_type_map, "{0} model just accept {1} now, \
+                      but you pass in {2}.".format(
+                      model_family,
+                      list(quantize_type_map.keys()),
+                      dtype))
     quantize_type = quantize_type_map[dtype]
     quantize_args = "{0}/bin/quantize-{1} {2} {3} {4}".format(bin_dirname,
                                                               model_family,