Paver exists because of SitePen’s Kevin Dangoor, and his work on the SitePen Support web application. We found that the build tools that exist with Python just aren’t all that easy to use.
Paver is a Python-based build/distribution/deployment scripting tool along the lines of Make or Rake. What makes Paver unique is its integration with commonly used Python libraries. Common tasks that were easy before remain easy. More importantly, dealing with your applications specific needs and requirements is now much easier.
As is the case with most of the things we work on, Paver made our lives easier, and we thought it might be beneficial for you. Currently an alpha release, Paver is available under the BSD license.
Persevere on the other hand is a more deliberate approach to rethink how web servers work, and development is lead by SitePen’s Kris Zyp:
- Create, read, update, and delete access to persistent data through a standard JSON HTTP/REST web interface
- Flexible and fast indexed query capability through JSONPath
- Comet-based data monitoring capabilities through HTTP Channels with Bayeux transport plugin/negotiation support
- Data-centric capability-based object level security with user management, Persevere is designed to be accessed securely through Ajax with public-facing sites
- Comprehensive referencing capabilities using JSON referencing, including circular, multiple, lazy, non-lazy, cross-data source, and cross-site referencing for a wide variety of object structures
- Data integrity and validation through JSON Schema
- Class-based data hierarchy – typed objects can have methods, inheritance, class-based querying
- Pluggable data source architectures – SQL tables, XML files, remote web services can be used as data stores
- Service discovery through Service Mapping Description