【发布时间】：2023-03-24 12:32:01
【问题描述】：
我的环境创建了一个如下所示的变量：
SM_TRAINING_ENV={"additional_framework_parameters":{},"channel_input_dirs":{"training":"/opt/ml/input/data/training"},"current_host":"algo-1","framework_module":"sagemaker_tensorflow_container.training:main","hosts":["algo-1"],"hyperparameters":{"bool_param":true,"float_param":1.25,"int_param":5,"model_dir":"s3://bucket/detection/prefix/testing-2019-04-06-02-24-20-194/model","str_param":"bla"},"input_config_dir":"/opt/ml/input/config","input_data_config":{"training":{"RecordWrapperType":"None","S3DistributionType":"FullyReplicated","TrainingInputMode":"File"}},"input_dir":"/opt/ml/input","is_master":true,"job_name":"testing-2019-04-06-02-24-20-194","log_level":20,"master_hostname":"algo-1","model_dir":"/opt/ml/model","module_dir":"s3://bucket/prefix/testing-2019-04-06-02-24-20-194/source/sourcedir.tar.gz","module_name":"launcher.sh","network_interface_name":"ethwe","num_cpus":8,"num_gpus":1,"output_data_dir":"/opt/ml/output/data","output_dir":"/opt/ml/output","output_intermediate_dir":"/opt/ml/output/intermediate","resource_config":{"current_host":"algo-1","hosts":["algo-1"],"network_interface_name":"ethwe"},"user_entry_point":"launcher.sh"}
编辑 by Ed Morton：根据the OPs comment below，这是他在上面试图描述为示例输入的内容：
$ SM_TRAINING_ENV='{"additional_framework_parameters":{},"channel_input_dirs":{"training":"/opt/ml/input/data/training"},"current_host":"algo-1","framework_module":"sagemaker_tensorflow_container.training:main","hosts":["algo-1"],"hyperparameters":{"bool_param":true,"float_param":1.25,"int_param":5,"model_dir":"s3://bucket/detection/prefix/testing-2019-04-06-02-24-20-194/model","str_param":"bla"},"input_config_dir":"/opt/ml/input/config","input_data_config":{"training":{"RecordWrapperType":"None","S3DistributionType":"FullyReplicated","TrainingInputMode":"File"}},"input_dir":"/opt/ml/input","is_master":true,"job_name":"testing-2019-04-06-02-24-20-194","log_level":20,"master_hostname":"algo-1","model_dir":"/opt/ml/model","module_dir":"s3://bucket/prefix/testing-2019-04-06-02-24-20-194/source/sourcedir.tar.gz","module_name":"launcher.sh","network_interface_name":"ethwe","num_cpus":8,"num_gpus":1,"output_data_dir":"/opt/ml/output/data","output_dir":"/opt/ml/output","output_intermediate_dir":"/opt/ml/output/intermediate","resource_config":{"current_host":"algo-1","hosts":["algo-1"],"network_interface_name":"ethwe"},"user_entry_point":"launcher.sh"}'
$ echo "$SM_TRAINING_ENV"
{"additional_framework_parameters":{},"channel_input_dirs":{"training":"/opt/ml/input/data/training"},"current_host":"algo-1","framework_module":"sagemaker_tensorflow_container.training:main","hosts":["algo-1"],"hyperparameters":{"bool_param":true,"float_param":1.25,"int_param":5,"model_dir":"s3://bucket/detection/prefix/testing-2019-04-06-02-24-20-194/model","str_param":"bla"},"input_config_dir":"/opt/ml/input/config","input_data_config":{"training":{"RecordWrapperType":"None","S3DistributionType":"FullyReplicated","TrainingInputMode":"File"}},"input_dir":"/opt/ml/input","is_master":true,"job_name":"testing-2019-04-06-02-24-20-194","log_level":20,"master_hostname":"algo-1","model_dir":"/opt/ml/model","module_dir":"s3://bucket/prefix/testing-2019-04-06-02-24-20-194/source/sourcedir.tar.gz","module_name":"launcher.sh","network_interface_name":"ethwe","num_cpus":8,"num_gpus":1,"output_data_dir":"/opt/ml/output/data","output_dir":"/opt/ml/output","output_intermediate_dir":"/opt/ml/output/intermediate","resource_config":{"current_host":"algo-1","hosts":["algo-1"],"network_interface_name":"ethwe"},"user_entry_point":"launcher.sh"}
如何创建一个等于SM_TRAINING_ENV["hyperparameters"]["model_dir"] 值的新bash 变量？
为了完整起见，我尝试了echo ${SM_TRAINING_ENV} | jq . 之类的简单操作，但我尝试的所有操作都不断出错。
编辑：我被告知这个值不是正确的 json，所以重新措辞这个问题。我认为环境将其设置为 python 字典的值，所以 jq 似乎不可用。删除了json 标签。也许这是awk 的工作？
如果我假设结构不会随着正则表达式模式s3.*?model 而改变，但我不确定如何将正则表达式模式设置为新变量，那么看起来我可以匹配我想要的值。
【问题讨论】：
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在这里提问之前您搜索了什么？
man jq -
我一直在尝试 jq 和 regex，不知道如何正确使用它。不断收到错误
jq: error: additional_framework_parameters/0 is not defined at <top-level>, line 1: -
您仍然应该展示您尝试过的内容，以使问题完整。
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使用该信息编辑
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不清楚
a variable that looks like this是什么意思，因为该语句后面的文本看起来不像变量。您是想说您有一个变量（例如，名为var），如果您执行echo "$var"，则输出SM_TRAINING_ENV={"add...sh"}，或者您有一个名为SM_TRAINING_ENV的变量，如果您执行echo "$SM_TRAINING_ENV"，则输出{"add...sh"}或还有什么？
标签： bash dictionary indexing awk environment-variables