python -c "from transformers import pipeline; print(pipeline('sentiment-analysis')('we love you'))"
Microsoft Visual C++ Redistributable is not installed, this may lead to the DLL load failure.
                 It can be downloaded at https://aka.ms/vs/16/release/vc_redist.x64.exe
Traceback (most recent call last):
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\utils\import_utils.py", line 1172, in _get_module
    return importlib.import_module("." + module_name, self.__name__)
  File "E:\Eprogramfiles\Anaconda3\lib\importlib\__init__.py", line 127, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 783, in exec_module
  File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\pipelines\__init__.py", line 44, in <module>     
    from .audio_classification import AudioClassificationPipeline
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\pipelines\audio_classification.py", line 21, in <
module>
    from .base import PIPELINE_INIT_ARGS, Pipeline
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\pipelines\base.py", line 36, in <module>
    from ..modelcard import ModelCard
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\modelcard.py", line 48, in <module>
    from .training_args import ParallelMode
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\training_args.py", line 30, in <module>
    from .trainer_utils import (
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\trainer_utils.py", line 47, in <module>
    import tensorflow as tf
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\tensorflow\__init__.py", line 41, in <module>
    from tensorflow.python.tools import module_util as _module_util
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\tensorflow\python\__init__.py", line 40, in <module>
    from tensorflow.python.eager import context
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\tensorflow\python\eager\context.py", line 35, in <module>     
    from tensorflow.python import pywrap_tfe
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\tensorflow\python\pywrap_tfe.py", line 28, in <module>        
    from tensorflow.python import pywrap_tensorflow
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\tensorflow\python\pywrap_tensorflow.py", line 28, in <module>
    self_check.preload_check()
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\tensorflow\python\platform\self_check.py", line 54, in preload
_check
    raise ImportError(
ImportError: Could not find the DLL(s) 'msvcp140_1.dll'. TensorFlow requires that these DLLs be installed in a dire
ctory that is named in your %PATH% environment variable. You may install these DLLs by downloading "Microsoft C++ R
edistributable for Visual Studio 2015, 2017 and 2019" for your platform from this URL: https://support.microsoft.co
m/help/2977003/the-latest-supported-visual-c-downloads

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "<frozen importlib._bootstrap>", line 1039, in _handle_fromlist
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\utils\import_utils.py", line 1162, in __getattr__
    module = self._get_module(self._class_to_module[name])
  File "E:\Eprogramfiles\Anaconda3\lib\site-packages\transformers\utils\import_utils.py", line 1174, in _get_module
    raise RuntimeError(
RuntimeError: Failed to import transformers.pipelines because of the following error (look up to see its traceback)
:
Could not find the DLL(s) 'msvcp140_1.dll'. TensorFlow requires that these DLLs be installed in a directory that is  named in your %PATH% environment variable. You may install these DLLs by downloading "Microsoft C++ Redistributable for Visual Studio 2015, 2017 and 2019" for your platform from this URL: https://support.microsoft.com/help/2977003/the-latest-supported-visual-c-downloads
PS E:\Eprogramfiles\Anaconda3\Scripts>

解决方法：把 msvcp140_1.dll 复制到path变量中某一个文件夹即可。

==========================================

如何安装transformers

1. 首先，需要安装Python。建议安装3.6及以上版本的Python。

2. 按照transformers官方文档的要求，需要额外安装PyTorch或TensorFlow。具体选择哪一个取决于您的需求。建议先安装PyTorch或TensorFlow，然后再安装transformers。

3. 打开终端，输入以下命令安装transformers：

   pip install transformers

4. 安装完成后，您可以尝试运行以下命令测试是否成功安装：

   python -c "from transformers import pipeline; print(pipeline('sentiment-analysis')('we love you'))"

   如果输出结果为：

   [{'label': 'POSITIVE', 'score': 0.9998704795837402}]

   则说明已经成功安装并使用transformers进行了情感分析。

REF

https://www.5axxw.com/questions/simple/1lzxjc