The Makefile target for FoxySheepParser.py contains the patch command. In order for the generated antlr4 lexer to work we need to patch the generated Python lexer The patch file .patch does this. The resulting files are placed in FoxySheep/generated.įiles generated by ANTLR4 are assumed to be in a subdirectory called generated containing an empty _init_.py file. To (re)generate the lexer/parser you need to $ make To change the grammar you’ll need the ANTLR Parser Generator + 2 into Python, while not handled now, canīe done by looking at the types of the operands of plus, and noticing one is a scalar Here are some examples: 167.5 -> decimal.Decimal(167.5) Still a lot of details to be filled out, some of the basics are there. Conversion to PythonĪ very crude translator to Python has been started. Mathamatica files in pytest/parse_expressions.įor help on foxy-sheep, run foxy-sheep -help. To call from Python: from FoxySheep import if2ff, if2python print ( if2ff ( "x^2-3x+4" ) # Prints: Plus,Times,4] print ( if2ff ( "x^2-3x+4" ) # Prints (x ** 2 + -1 * 3)įor more demos run foxy-sheep -file pytest/parse_expressions/SO1.m or with other The first few examples from Fast Introduction for Math Students foxy-sheep -o python Enter either an empty line, Ctrl-C, or Ctrl-D to exit. Having Mathematica installed: To run the code interactively: $ foxy-sheepĮnter a Mathematica expression. Which can convert Mathematica InputForm to When installed, the command-line translator is called foxy-sheep It has been stripped down and reorganized a bit. This is the Robert Jacobson’s Python implementation of the FoxySheep parser and lexer for Mathematica.
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