在这个问题上,我和用户处于类似的境地;
我有一个Codestar项目(Django通过Bean秸秆),我无法让应用程序访问任何rds实例。在测试步骤(python manage.py test)期间尝试部署时,将引发以下错误消息;
django.db.utils.OperationalError: could not connect to server: Connection timed out
Is the server running on host "172.31.44.126" and accepting
TCP/IP connections on po
我有一组字符串,如
mystring
[1] "RData/processed_AutoServico_cat.rds"
[2] "RData/processed_AutoServico_cat_master.rds"
我想检索下划线"_“和".rds”之间的字符串
我可以分两步做
str_extract(mystring, '[^_]+$') %>% # get everything after the last '_'
str_extract('.+(?=\\.rds)') # g