Transcrypt is a tool to precompile a fairly extensive subset of Python into compact, readable Javascript. It has the following characteristics:
Allows for classical OO programming with multiple inheritance using pure Python syntax, parsed by CPython’s native parser
Seamless integration with the universe of high-quality web-oriented JavaScript libraries, rather than the desktop-oriented Python ones
Hierarchical URL based module system to prevent name conflicts
Simple relation between Python source and generated JavaScript code for easy debugging
Multi-level sourcemaps and optional annotation of target code with source references
Compact downloads, kB’s rather than MB’s
Lightning fast JavaScript code, using memoization (call caching) to optionally bypass the prototype lookup chain
Operator overloading can be switched on and off locally to facilitate use for numerical math that’s both readable and efficient
Transcription once used to be manual labour
Documentation with code examples
Take a look at the documentation with code examples at the Transcrypt website: http://www.transcrypt.org .
Status
Release 4 (version 3.5.161):
Almost all of the math module and most important part of random module added
Most important part of turtle module added. Uses SVG, see editable examples at: http://www.transcrypt.org/live/turtle_site/turtle_site.html
Multi-level sourcemaps, annotated target code, virtualenv installation.
Automated tests of functionality of compiled code OK.
Manual tests of sourcemaps and random module OK.
Further tests and feedback very welcome.
Sourcemaps were tested on Chrome under Windows and Linux, but seem to work on Firefox under Linux as well.
What’s new
Fix for issue #60: Python bool () not translated, testcase added, bitwise ops tested as well
Fix for issue #61: ‘-h produces traceback’, tested
iOS web app demo added, full screen, native look and feel, also works off-line. Add it to the home screen of your iPhone and click the prepacked icon. Tested on iPhone 5 and 6. Also works in any browser. Write once…
Known restrictions
No standard libs, use or encapsulate the JavaScript ones, that’s part of the concept. Some may be ported though.
Not all methods of builtin types are there by default. This results from a deliberate choice to keep Transcrypt lean. Such things can be distributed in separate libs.
No eval and exec of Python code. This is again part of the concept. Transcrypt code is compiled, optimized and minified in advance to warant fast page loads.
No threading of any kind. Will probably stay that way as long as JavaScript doesn’t properly support that.
No iterator, generator, xrange stuff. Maybe in the future if a broadly installed version of JavaScript suppports it.
Known bugs
None
Readability
As can be seen below, there’s a simple parallel between the Python and the JavaScript code. So it should be easy to debug. Also, code can be tested from the command prompt using stubs.
Classic OO with multiple inheritance in JavaScript
Other packages you might like
Multi-module Python source code obfuscator: https://pypi.python.org/pypi/Opy
PLC simulator with Arduino code generation: https://pypi.python.org/pypi/SimPyLC
A lightweight Python course taking beginners seriously (under construction): https://pypi.python.org/pypi/LightOn
Event driven evaluation nodes: https://pypi.python.org/pypi/Eden
Numscrypt (under construction, very early stage), experimental port of a microscopic part of NumPy to Transcrypt, using JavaScript typed arrays: https://pypi.python.org/pypi/Numscrypt
Licence
Copyright 2014, 2015, 2016 Jacques de Hooge, GEATEC engineering, www.geatec.com
Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except in compliance with the License. You may obtain a copy of the License at
Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.
Release files for Transcrypt 3.5.189
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| Transcrypt-3.5.189.zip | 12.6 MB | Details |
Release files / Transcrypt-3.5.189.zip
| Download URL | Transcrypt-3.5.189.zip |
|---|---|
| Size | 12.6 MB |
| Tags | Source |
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SHA-256 checksum How to use checksums |
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