dopy

An experimental Python preprocessor that enables do..end syntax in place of strict indentation

Requirements

• python 3.10+
• pip

Installation

pip install dopy-syntax

Features

• Converts ruby/lua style do..end blocks into indented blocks
• Maintains python's semantics
• Preserves string literals and comments
• Processes .dopy files into pep8 compliant .py files (maintaining the dir structure)
• supports type hints
• Transpiles imports concurrently

Usage

Programmatic

from dopy.core import Dopy
dopy = Dopy()

source = '''
def hello_world() do
  print("Hello")
end
hello_world()
'''

processed = dopy.preprocess(source)
exec(processed, namespace={})

More examples in the examples dir

cli

dopy my_module.dopy

Will use the current active python interpreter, can be overridden with PYTHON_PATH env var

Flags

-h,--help: Print help text

-k,--keep: Keep transpiled python files in place (will overwrite)

-s,--stdout: Print the transpiled python code to console and exit

-c,--check: Check dopy syntax without transpiling

Syntax Rules

• Make sure the do keyword is on the same line as rest of the block declaration,
• end should be on its own line
• all imports at the top of the module
• must create a __init__.py file in dirs so that the transpiled python modules can be recognised
• Keep imports relative to the directory structure, similar to regular Python

Acknowledgements

This project is hugely inspired by mathialo/bython

License

See LICENSE

Update- Archived

I built this to learn more about python/interpreter language syntax in general, but not interested in pursuing this further.