def xlat_func2tex(ast, ast2tex):
xact = _XLAT_FUNC2TEX.get(ast.func)
if xact:
args, kw = AST.args2kwargs(ast.args)
try:
return xact(ast2tex, *args, **kw)
except:
pass
return None
def xlat_attr2tex(ast, ast2tex):
if ast.is_attr_func:
xact = _XLAT_ATTRFUNC2TEX.get(ast.attr)
if xact:
args, kw = AST.args2kwargs(ast.args)
try:
return xact(ast2tex, ast.obj, *args, **kw)
except:
pass
return None
def xlat_funcs2asts(
ast,
xlat,
func_call=None,
recurse=True
): # translate eligible functions in tree to other AST representations
if not isinstance(ast, AST):
return ast
if ast.is_func:
xact = xlat.get(ast.func)
args = ast.args
ret = lambda: AST('-func', ast.func, args)
elif ast.is_attr_func:
xact = xlat.get(f'.{ast.attr}')
args = (ast.obj, ) + ast.args
ret = lambda: AST('.', args[0], ast.attr, tuple(args[1:]))
else:
xact = None
if xact is not None:
if recurse:
args = AST(*(xlat_funcs2asts(a, xlat, func_call=func_call)
for a in args))
try:
if xact is True: # True means execute function and use return value for ast, only happens for -func
return func_call(
ast.func, args
) # not checking func_call None because that should never happen
xargs, xkw = AST.args2kwargs(args)
ast2 = xact(*xargs, **xkw)
if ast2 is not None:
return ast2
except:
pass
return ret()
if recurse:
return AST(*(xlat_funcs2asts(a, xlat, func_call=func_call)
for a in ast)) #, **ast._kw)
return ast
def evalexpr(ast):
sym.ast2spt.set_precision(ast)
if ast.is_func and ast.func in AST.Func.PLOT: # plotting?
args, kw = AST.args2kwargs(AST.apply_vars(ast.args, _VARS),
sym.ast2spt)
ret = getattr(splot, ast.func)(*args, **kw)
return {
'msg': [
'Plotting not available because matplotlib is not installed.'
]
} if ret is None else {
'img': ret
}
elif ast.op in {
'@', '-func'
} and ast[1] in AST.Func.ADMIN: # special admin function?
asts = globals()[f'_admin_{ast [1]}'](
*(ast.args if ast.is_func else ()))
if isinstance(asts, str):
return {'msg': [asts]}
elif isinstance(asts, list) and isinstance(asts[0], str):
return {'msg': asts}
else: # not admin function, normal evaluation
ast, vars = _prepare_ass(ast)
if _SYMPAD_DEBUG:
print('ast: ', ast, file=sys.stderr)
try:
spt, xlat = sym.ast2spt(ast, retxlat=True) # , _VARS)
if _SYMPAD_DEBUG and xlat:
print('xlat: ', xlat, file=sys.stderr)
sptast = sym.spt2ast(spt)
except:
if _SYMPAD_DEBUG:
print(file=sys.stderr)
raise
if _SYMPAD_DEBUG:
try:
print('spt: ', repr(spt), file=sys.stderr)
except:
pass
print('spt type: ', type(spt), file=sys.stderr)
try:
print('spt args: ', repr(spt.args), file=sys.stderr)
except:
pass
print('spt latex: ', sp.latex(spt), file=sys.stderr)
print('spt ast: ', sptast, file=sys.stderr)
print('spt tex: ', sym.ast2tex(sptast), file=sys.stderr)
print('spt nat: ', sym.ast2nat(sptast), file=sys.stderr)
print('spt py: ', sym.ast2py(sptast), file=sys.stderr)
print(file=sys.stderr)
asts = _execute_ass(sptast, vars)
response = {}
if asts and asts[0] != AST.None_:
response.update({
'math': [{
'tex': sym.ast2tex(ast),
'nat': sym.ast2nat(ast),
'py': sym.ast2py(ast),
} for ast in asts]
})
return response