From 5c35709fbd385c83ee8b23d0e2e4b682c157e2de Mon Sep 17 00:00:00 2001
From: Christian Gram Kalhauge <chrg@dtu.dk>
Date: Thu, 20 Feb 2025 10:03:45 +0100
Subject: [PATCH] This is not the place for this.
---
pyrtree/.gitignore | 1 -
pyrtree/expr.py | 161 ---------------------------
pyrtree/rtree.py | 264 ---------------------------------------------
3 files changed, 426 deletions(-)
delete mode 100644 pyrtree/.gitignore
delete mode 100644 pyrtree/expr.py
delete mode 100644 pyrtree/rtree.py
diff --git a/pyrtree/.gitignore b/pyrtree/.gitignore
deleted file mode 100644
index bee8a64..0000000
--- a/pyrtree/.gitignore
+++ /dev/null
@@ -1 +0,0 @@
-__pycache__
diff --git a/pyrtree/expr.py b/pyrtree/expr.py
deleted file mode 100644
index e5f70b6..0000000
--- a/pyrtree/expr.py
+++ /dev/null
@@ -1,161 +0,0 @@
-from dataclasses import dataclass
-from functools import partial
-
-import rtree
-
-
-@dataclass
-class Let:
- var: str
- assignee: "Expr"
- body: "Expr"
-
- def replace(self, reps):
- return Let(
- self.var,
- self.assignee.replace(reps),
- self.body.replace(reps),
- )
-
- def eval(self, vals=None):
- vals = vals or dict()
- r = self.assignee.eval(vals)
- vals = vals.copy()
- vals[self.var] = r
- return self.body.eval(vals)
-
- def subterms(self):
- yield self
- yield from self.assignee.subterms()
- yield from self.body.subterms()
-
- def pretty(self, prec=0):
- p = f"{self.var} := {self.assignee.pretty(2)}; {self.body.pretty(1)}"
- if prec >= 1:
- p = f"({p})"
- return p
-
-
-@dataclass
-class Add:
- lhs: "Expr"
- rhs: "Expr"
-
- def replace(self, reps):
- return Add(
- self.lhs.replace(reps),
- self.rhs.replace(reps),
- )
-
- def subterms(self):
- yield self
- yield from self.lhs.subterms()
- yield from self.rhs.subterms()
-
- def pretty(self, n=0):
- p = f"{self.lhs.pretty(4)} + {self.rhs.pretty(3)}"
- if n >= 3:
- p = f"({p})"
- return p
-
- def eval(self, vals=None):
- vals = vals or dict()
- lv = self.lhs.eval(vals)
- rv = self.rhs.eval(vals)
- return lv + rv
-
-
-@dataclass
-class Const:
- n: int
-
- def replace(self, _):
- return self
-
- def subterms(self):
- yield self
-
- def pretty(self, _=0):
- return str(self.n)
-
- def eval(self, _vals=None):
- return self.n
-
-
-@dataclass
-class Var:
- name: str
-
- def replace(self, reps):
- return reps.get(self.name, self)
-
- def subterms(self):
- yield self
-
- def pretty(self, _=0):
- return self.name
-
- def eval(self, vals=None):
- vals = vals or dict()
- return vals.get(self.name, -1)
-
-
-Expr = Let | Add | Const | Var
-
-
-def reduce_expr(expr: Expr, check) -> Expr:
- if isinstance(expr, Var):
- return expr
- elif isinstance(expr, Const):
- if not expr.n == 0 and check("1) make zero"):
- return Const(0)
- return expr
- elif isinstance(expr, Add):
- lhs_ = reduce_expr(expr.lhs, check)
- rhs_ = reduce_expr(expr.rhs, check)
- if check("2) reduce to lhs"):
- return lhs_
- if check("3) reduce to rhs"):
- return rhs_
- return Add(lhs_, rhs_)
- elif isinstance(expr, Let):
- assignee_ = reduce_expr(expr.assignee, check)
- if check("4) reduce to assingee"):
- return assignee_
- if check(f"5) inline {expr.var!r}"):
- return reduce_expr(expr.body.replace({expr.var: assignee_}), check)
- body_ = reduce_expr(expr.body, check)
- return Let(expr.var, assignee_, body_)
-
-
-if __name__ == "__main__":
- expr = Let(
- "x", Const(2), Add(Const(1), Let("y", Var("x"), Add(Const(3), Var("y"))))
- )
-
- def input_format(a):
- return f"$\\syn{{{a.pretty()}}}$"
-
- p = rtree.latex(
- lambda e: any(isinstance(a, Add) for a in e.subterms()),
- query_format=str,
- input_format=input_format,
- start_count=0,
- )
- rt = partial(reduce_expr, expr)
- p(rtree.Probe(rt, []))
- rp = rtree.reduce(p, rt)
- print(f"& \\verb|{rtree.pretty(rp)}| & {input_format(rp.input)} & true \\\\")
-
- print()
-
- p = rtree.latex(
- lambda e: e.eval() == expr.eval(),
- query_format=str,
- input_format=input_format,
- start_count=0,
- )
- rt = partial(reduce_expr, expr)
- p(rtree.Probe(rt, []))
- rp = rtree.reduce(p, rt)
- print(f"& {rtree.pretty(rp)} & {input_format(rp.input)} & true \\\\")
diff --git a/pyrtree/rtree.py b/pyrtree/rtree.py
deleted file mode 100644
index ac6b969..0000000
--- a/pyrtree/rtree.py
+++ /dev/null
@@ -1,264 +0,0 @@
-from dataclasses import dataclass
-import math
-from typing import TypeVar
-
-
-def reduce_simp(predicate, rtree):
- path: list[bool] = []
- labels: list[str] = []
-
- def check(label):
- labels.append(label)
- return path[len(labels) - 1] if len(path) >= len(labels) else False
-
- i = rtree(check)
- while len(path) < len(labels):
- path.append(True)
- labels.clear()
- if t := predicate(j := rtree(check)):
- i = j
- else:
- path[-1] = False
- print(f"{labels[len(path) - 1]} ... test {j!r:<10} ... {t}")
- return i
-
-
-class Probe:
- def __init__(self, rtree, path, guess_depth=0):
- """Test an rtree with a path, and optional number of guesses"""
- self.path = path + [True] * guess_depth
- self.depth = guess_depth
- self.reasons = []
-
- def check(reason: str):
- """Check the path or default to false"""
- self.reasons.append(reason)
- return self.undecided() <= 0 and self.path[len(self.reasons) - 1]
-
- self.input = rtree(check)
-
- def undecided(self):
- """The number of choices left on the path"""
- return len(self.reasons) - len(self.path)
-
-
-def reduce1(predicate, rtree):
- # Extract the initial reduction probe, from the rightmost branch.
- rp = Probe(rtree, [])
- # Run exponential search after the depest sequence of trues
- # that can be appended to the path without failing the predicate
- depth = 1
- # Invariant: predicate(rp) == True
- while rp.undecided() > 0:
- # Try to probe the with current path extended by one trues
- if predicate(rp_ := Probe(rtree, rp.path, depth)):
- rp = rp_
- continue
- rp.path.append(False)
- # return the input.
- return rp
-
-
-def reduce(predicate, rtree):
- # Extract the initial reduction probe, from the rightmost branch.
- rp = Probe(rtree, [])
- # Run exponential search after the depest sequence of trues
- # that can be appended to the path without failing the predicate
- depth = 1
- # Invariant: predicate(rp) == True
- while rp.undecided() > 0:
- # Try to probe the with current path extended by trues trues.
- if predicate(rp_ := Probe(rtree, rp.path, depth)):
- rp, depth = rp_, depth * 2
- continue
- # Adjust the depth so that none of them are wasted.
- depth += min(0, rp_.undecided())
- # Perform a binary search, accepting the nessarary trues, and
- # reducing the unknown trues to 1:
- while depth > 1:
- # Prope the rtree with the current path extended by half the depth.
- if predicate(rp_ := Probe(rtree, rp.path, depth // 2)):
- rp = rp_ # Accept the current path.
- depth -= depth // 2 # And try the remaining half
- else:
- depth //= 2 # Half the current trues
- # Store that the next element in the path has to be false
- rp.path.append(False)
- # return the input.
- return rp
-
-
-def debug(predicate):
- counter = 0
-
- def newpred(rp):
- nonlocal counter
- counter += 1
- t = predicate(rp.input)
- print(
- f"{counter:02})",
- ", ".join(rp.reasons[len(rp.path) - rp.depth : len(rp.path)]),
- )
- print(f"... P({rp.input!r}) = {t}")
- return t
-
- return newpred
-
-
-def latex(
- predicate,
- query_format="Remove {}?".format,
- input_format="\\verb|{}|".format,
- start_count=0,
-):
- counter = start_count - 1
-
- def newpred(rp):
- nonlocal counter
- counter += 1
- t = predicate(rp.input)
- query = ", ".join(rp.reasons[len(rp.path) - rp.depth : len(rp.path)])
- theck = "true" if t else "false"
-
- print(
- f"{counter:02} & \\verb|{pretty(rp)}| & {query_format(query)} & {input_format(rp.input)} & {theck} \\\\"
- )
- return t
-
- return newpred
-
-
-def table(
- predicate,
- input_format="{}".format,
- query_format=str,
- start_count=0,
-):
- counter = start_count - 1
-
- def newpred(rp):
- nonlocal counter
- counter += 1
- t = predicate(rp.input)
- query = ", ".join(
- query_format(a) for a in rp.reasons[len(rp.path) - rp.depth : len(rp.path)]
- )
- theck = "true " if t else "false"
-
- print(f"{counter:02} - {input_format(rp.input)} - {theck} - {query}")
- return t
-
- return newpred
-
-
-def pretty(rp):
- from itertools import zip_longest
-
- def binary(a):
- return "1" if a else "0"
-
- return "".join(
- a if b != "*" else "!"
- for a, b in zip_longest(map(binary, rp.path), rp.reasons, fillvalue="*")
- )
-
-
-def reduce_abc(check) -> str:
- result = ""
- for x in "abc":
- if not check(f"remove {x}?"):
- result += x
- else:
- result += " "
- return result
-
-
-def reduce_dd2(c: list, check) -> list:
- if check(f"ignore {c}?"):
- return []
- if len(c) == 1:
- return c
- pivot = len(c) // 2
- c2 = reduce_dd(c[pivot:], check)
- c1 = reduce_dd(c[:pivot], check)
- return c1 + c2
-
-
-def reduce_dd(c: list, check) -> list:
- if len(c) == 1:
- return c
- pivot = len(c) // 2
- c1 = c[:pivot]
- c2 = c[pivot:]
- if check(f"result in c1: {c1}?"):
- return reduce_dd(c1, check)
- elif check(f"result in c2: {c2}?"):
- return reduce_dd(c2, check)
- else:
- return reduce_dd(c1, check) + reduce_dd(c2, check)
-
-
-I = TypeVar("I")
-
-
-def reduce_df(i: I, actions, check) -> I:
- j = None
- while i != j:
- for act in actions:
- if check(f"apply {act}?"):
- i, j = act(i), i
- else:
- break
- return i
-
-
-def reduce_ddmin(input: list, check, n=2) -> list:
- def find_next(input, n):
- step = math.ceil(len(input) / n)
- subsets = [(step * i, step * (i + 1)) for i in range(n)]
- for i, (f, t) in enumerate(subsets):
- if check(f"delta: {i}/{n}"):
- return input[f:t], 2
-
- for i, (f, t) in enumerate(subsets) if n != 2 else []:
- if check(f"complement: {i}/{n}"):
- return input[:f] + input[t:], max(n - 1, 2)
-
- return input, n * 2
-
- while len(input) > 1 and n < 2 * len(input):
- input, n = find_next(input, n)
-
- return input
-
-
-def test_reduce_dd():
- from functools import partial
-
- p = debug(lambda a: 3 in a and 6 in a)
- rp = reduce(p, partial(reduce_dd, [1, 2, 3, 4, 5, 6, 7, 8]))
- print(rp)
-
-
-def test_reduce_ddmin():
- from functools import partial
-
- input_format = lambda a: "".join("X" if i in a else "." for i in range(1, 9))
- p = table(
- lambda a: 1 in a and 7 in a and 8 in a,
- input_format=input_format,
- query_format=str,
- )
- rp = reduce1(p, partial(reduce_ddmin, [1, 2, 3, 4, 5, 6, 7, 8]))
- print(f" - {input_format(rp.input)}")
-
-
-if __name__ == "__main__":
- p = latex(
- lambda e: "a" in e or "p" in e,
- start_count=0,
- )
- input_format = "\\verb|{}|".format
- p(Probe(reduce_abc, []))
- rp = reduce(p, reduce_abc)
- print(f"&& {input_format(rp.input)} & true \\\\")
--
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