Getting Started with CPM: The Powerful Chinese Pre-Trained Language Model

May 24, 2021 | Educational

The CPM (Chinese Pre-Trained Language Model) boasts a whopping 2.6 billion parameters, making it a formidable tool for various natural language processing tasks. Developed collaboratively by the Beijing Zhiyuan Institute of Artificial Intelligence and Tsinghua University, CPM is designed to handle Chinese language intricacies with exceptional prowess. In this article, we’ll guide you through using the model and troubleshooting common issues.

Overview of CPM

  • Language Model: CPM
  • Model Size: 2.6B parameters
  • Language: Chinese

How to Use CPM Model

To utilize CPM directly from the transformers library, you will need to follow these steps:

python
from transformers import XLNetTokenizer, TFGPT2LMHeadModel
import jieba

class XLNetTokenizer(XLNetTokenizer):
    translator = str.maketrans({"n": "u2582", "u2583": "n"})

    def _tokenize(self, text, *args, **kwargs):
        text = [x.translate(self.translator) for x in jieba.cut(text, cut_all=False)]
        text = ''.join(text)
        return super()._tokenize(text, *args, **kwargs)

    def _decode(self, *args, **kwargs):
        text = super()._decode(*args, **kwargs)
        text = text.replace(',', '').replace('u2582', '').replace('u2583', 'n')
        return text

tokenizer = XLNetTokenizer.from_pretrained("mymusise/CPM-GPT2")
model = TFGPT2LMHeadModel.from_pretrained("mymusise/CPM-GPT2")

Understanding the Code

Think of using the CPM model as getting ready for a grand Chinese feast. Each ingredient (the lines of code) is necessary to create a delightful dish (text generation). The XLNetTokenizer acts like an expert chef, preparing the ingredients by tokenizing the text into manageable pieces, while taking care to adjust the nuances of the Chinese language using the jieba library (the handy kitchen tool).

Once everything is prepped, calling upon the model with the tokenizer is like serving the beautifully arranged feast to your guests, ready for them to savor and enjoy. The outputs generated from CPM are the culinary delights produced from your carefully prepared ingredients.

Generating Text with CPM Model

Here’s how to generate text after setting up your model and tokenizer:

python
from transformers import TextGenerationPipeline

text_generater = TextGenerationPipeline(model, tokenizer)
texts = ["你的文本在这里", "填入其他测试文本", "举个例子", ..., "5436358"]

for text in texts:
    token_len = len(tokenizer._tokenize(text))
    print(text_generater(text, max_length=token_len + 15, top_k=1, use_cache=True, prefix="")[0]["generated_text"])
    print(text_generater(text, max_length=token_len + 15, do_sample=True, top_k=5)[0]["generated_text"])

Troubleshooting Tips

If you run into issues while using the CPM model, consider the following troubleshooting ideas:

  • Ensure that you have the correct versions of the transformers and jieba libraries installed. You can update them using pip install --upgrade transformers jieba.
  • Check your internet connection; sometimes model loading issues stem from connectivity problems.
  • If you encounter memory errors, consider reducing the model’s workload by processing smaller batches of text.
  • Verify that you don’t miss any necessary imports or configuration settings in your code.
  • For additional insights or if you wish to collaborate on AI development projects, stay connected with fxis.ai.

Final Thoughts

At fxis.ai, we believe that such advancements are crucial for the future of AI, as they enable more comprehensive and effective solutions. Our team is continually exploring new methodologies to push the envelope in artificial intelligence, ensuring that our clients benefit from the latest technological innovations.

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