报错如下：
#!cat /usr/local/lib/python3.6/dist-packages/tensorflow_core/python/tpu/tpu_feed.py
#@title #文章生成模块
作文最小篇幅 = 850 #@PARAM {type:"number", min:800, max:1024, step:1}
生成作文篇数 = 1 #@PARAM {type:"number", min:1, max:100, step:1}
%mv /home/EssayKiller_V2/LanguageNetwork/GPT2/finetune/models/mega/* /home/EssayKiller_V2/LanguageNetwork/GPT2/finetune/trained_models/
%cd /home/EssayKiller_V2/LanguageNetwork/GPT2/
!export TF_CPP_MIN_LOG_LEVEL=2
!echo '模型加载中，请稍后......'
!PYTHONPATH=$(pwd) python scripts/demo.py -ckpt_fn finetune/trained_models/model.ckpt-280000 -min_len $作文最小篇幅 -samples $生成作文篇数
!PYTHONPATH=$(pwd) python scripts/formatter.py -org_text result.txt
报错如下：$作文最小篇幅 -samples $ 生成作文篇数
#!cat /usr/local/lib/python3.6/dist-packages/tensorflow_core/python/tpu/tpu_feed.py
#@title #文章生成模块
作文最小篇幅 = 850 #@PARAM {type:"number", min:800, max:1024, step:1}
生成作文篇数 = 1 #@PARAM {type:"number", min:1, max:100, step:1}
%mv /home/EssayKiller_V2/LanguageNetwork/GPT2/finetune/models/mega/* /home/EssayKiller_V2/LanguageNetwork/GPT2/finetune/trained_models/
%cd /home/EssayKiller_V2/LanguageNetwork/GPT2/
!export TF_CPP_MIN_LOG_LEVEL=2
!echo '模型加载中，请稍后......'
!PYTHONPATH=$(pwd) python scripts/demo.py -ckpt_fn finetune/trained_models/model.ckpt-280000 -min_len
!PYTHONPATH=$(pwd) python scripts/formatter.py -org_text result.txt