a macro library that expoes the bytecode of python
Project description
bytecode macro lib
exposes (a slightly modified version of) the bytecode of a function to allow for run-time modification of python syntax.
how to use
for a description of how to use and install the program, please go to the docs folder on the github (https://github.com/Glubs9/bytecodemacro).
cool example to get you excited
this is a cool example to get you excited with what this library could do and the fun you can have doing it.
def goto(tups):
ret = []
for n in tups:
inst, arg = n
if inst == "LOAD_CONST" and len(arg) > 6 and arg[1:5] == "goto":
ret.append(("JUMP_ABSOLUTE", arg[6:-1]))
elif inst == "LOAD_CONST" and len(arg) > 2 and arg[-2] == ":":
ret.append(("LABEL", arg[1:-2]))
else:
ret.append(n)
return ret
@macro(goto)
def f():
n = 0
while n < 10:
if n > 5:
_ = "goto exit"
print(n)
n+=1
_ = "exit:"
f() #prints 1 2 3 4 5 !
please have fun writing your own macros! or just have fun looking at the examples in docs/examples.py in the github
basic installation
please read through install.txt for requirements but if you just want to get it installed before looking through the library the comamnd is.
python3 -m pip install bytecodemacro
todo
- add error / semantics checking for the returned bytecode (maybe)
- add more examples
- order examples.py by ease of understanding
- so the easy ones to read like constant and add_arg are at the top but the ones
that are harder like cloop or join are at the bottom
- fix walrus.py
- test and then handle encountering the extended arg instruction in the uncompile package
- i am also still lost on closures and co_freevars
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