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Allow ops

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This commit is contained in:
Andrew Murray 2023-10-28 15:58:52 +11:00
parent 45c726fd4d
commit 0ca3c33c59
2 changed files with 10 additions and 4 deletions
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5
Tests/test_imagemath.py
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@ -64,6 +64,11 @@ def test_prevent_exec(expression):
ImageMath.eval(expression) ImageMath.eval(expression)
def test_prevent_double_underscores():
with pytest.raises(ValueError):
ImageMath.eval("1", {"__": None})
def test_logical(): def test_logical():
assert pixel(ImageMath.eval("not A", images)) == 0 assert pixel(ImageMath.eval("not A", images)) == 0
assert pixel(ImageMath.eval("A and B", images)) == "L 2" assert pixel(ImageMath.eval("A and B", images)) == "L 2"

9
src/PIL/ImageMath.py
View File

@ -234,13 +234,14 @@ def eval(expression, _dict={}, **kw):
# build execution namespace # build execution namespace
args = ops.copy() args = ops.copy()
args.update(_dict) for k in list(_dict.keys()) + list(kw.keys()):
args.update(kw) if "__" in k or hasattr(__builtins__, k):
for k, v in args.items():
if '__' in k or hasattr(__builtins__, k):
msg = f"'{k}' not allowed" msg = f"'{k}' not allowed"
raise ValueError(msg) raise ValueError(msg)
args.update(_dict)
args.update(kw)
for k, v in args.items():
if hasattr(v, "im"): if hasattr(v, "im"):
args[k] = _Operand(v) args[k] = _Operand(v)