pandas parquet文件读取pyarrow、feather文件保存与读取;requests 或wget下载图片文件
**pandas读取文件填写绝对路径,相对路径可能出错读不了安装fastparquet库,需要安装python-snappy,一直安装错误,所以使用了pyarrowpipinstallpyarrow参考:https://arrow.apache.org/docs/python/importglobimportpandasaspdimportpyarrow.parquetaspqaaaaa=glob