______ __ | Torch7
/_ __/__ ________/ / | Scientific computing for LuaJIT.
/ / / _ \/ __/ __/ _ \ |
/_/ \___/_/ \__/_//_/ | https://github.com/torch
| http://torch.ch
th>
A pure Lua REPL for LuaJIT, with heavy support for Torch types.
Uses Readline for tab completion.
This package installs a new binary named th, which
comes packed with all these features:
Features:
- Tab-completion on nested namespaces
- Tab-completion on disk files (when opening a string)
- History
- Pretty print (table introspection and coloring)
- Auto-print after eval (can be stopped with ;)
- Each command is profiled, timing is reported
- No need for '=' to print
- Easy help with:
? funcname - Self help:
? - Shell commands with: $ cmd (example:
$ ls) - Print all user globals with
who() - Import a package's symbols globally with
import(package) - Require is overloaded to provide relative search paths:
require('./mylocallib/') - Optional strict global namespace monitoring
- Optional async repl (based on async)
Via luarocks:
luarocks install trepl
We install a binary, simple to remember:
th
> -- amazing repl!
Alternatively, you can always bring up the repl by loading it as a lib, from anywhere:
luajit
> repl = require 'trepl'
> repl()
Completion:
> cor+TAB ... completes to: coroutineHistory:
> ARROW_UP | ARROW_DOWNHelp (shortcut to Torch's help method):
> ? torch.FloatTensor
prints help...Shell commands:
> $ ls
README.md
init.lua
trepl-scm-1.rockspec
[Lua # 2] > $ ll
...
> $ ls
...History / last results. Two variables are used:
_RESULTS: contains the history of results:
> a = 1
> a
1
> 'test'
test
> _RESULTS
{
1 : 1
2 : test
}
_LAST: contains the last result
> _LAST
test
Convenient to get output from shell commands:
> $ ls -l
> _LAST
contains the results from ls -l, in a string.
Hide output. By default, TREPL always tries to dump the content of what's evaluated. Use ; to stop it.
> a = torch.Tensor(3)
> a:zero()
0
0
0
[torch.DoubleTensor of dimension 3]
> a:zero();
> Colors libraries can be loaded independently:
> c = require 'trepl.colorize'
> print(c.red('a red string') .. c.Blue('a bold blue string'))Global variables are a well known issue with Lua. th can be run
with a flag -g that will monitor global variables creation and access.
Creation of a variable will generate a warning message, while access will generate an error.
th -g
> require 'sys';
created global variable: sys @ [c-module]
> a = 1
created global variable: a @ a = 1
> b
error: attempt to read undeclared variable bAn asynchronous repl can be started with -a. Based on async,
this repl is non-blocking, and can be used to spawn/schedule asyncrhonous jobs. It is still beta,
and does not yet have readline support:
th -a
> idx = 1
> async.setInterval(1000, function() print('will be printed every second - step #' .. idx) idx = idx + 1 end)
will be printed every second - step #1
will be printed every second - step #2
will be printed every second - step #3
> idx = 20
will be printed every second - step #20
will be printed every second - step #21
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