Torch is not in active development. The functionality provided by the C backend of Torch, which are the TH, THNN, THC, THCUNN libraries is actively extended and re-written in the ATen C++11 library (source, mirror). ATen exposes all operators you would expect from torch7, nn, cutorch, and cunn directly in C++11 and includes additional support for sparse tensors and distributed operations. It is to note however that the API and semantics of the backend libraries in Torch-7 are different from the semantice provided by ATen. For example ATen provides numpy-style broadcasting while TH* dont. For information on building the forked Torch-7 libraries in C, refer to "The C interface" in pytorch/aten/src/README.md.
Torch7 community support can be found at the following locations. As of 2019, the Torch-7 community is close to non-existent.
- Questions, Support, Install issues: Google groups
- Reporting bugs: torch7 nn cutorch cunn optim threads
- Hanging out with other developers and users (strictly no install issues, no large blobs of text): Gitter Chat
Torch is the main package in Torch7 where data structures for multi-dimensional tensors and mathematical operations over these are defined. Additionally, it provides many utilities for accessing files, serializing objects of arbitrary types and other useful utilities.
- Tensor Library
- Tensor defines the all powerful tensor object that provides multi-dimensional numerical arrays with type templating.
- Mathematical operations that are defined for the tensor object types.
- Storage defines a simple storage interface that controls the underlying storage for any tensor object.
- File I/O Interface Library
- File is an abstract interface for common file operations.
- Disk File defines operations on files stored on disk.
- Memory File defines operations on stored in RAM.
- Pipe File defines operations for using piped commands.
- High-Level File operations defines higher-level serialization functions.
- Useful Utilities
- Timer provides functionality for measuring time.
- Tester is a generic tester framework.
- CmdLine is a command line argument parsing utility.
- Random defines a random number generator package with various distributions.
- Finally useful utility functions are provided for easy handling of torch tensor types and class inheritance.