From bc192557b8de105da5942108d33d643f83513976 Mon Sep 17 00:00:00 2001 From: Andrew Murray Date: Thu, 11 Jan 2024 23:11:12 +1100 Subject: [PATCH] Added type hints --- pyproject.toml | 1 - src/PIL/ImageMorph.py | 50 +++++++++++++++++++++++---------------- src/PIL/_imagingmorph.pyi | 5 ++++ 3 files changed, 35 insertions(+), 21 deletions(-) create mode 100644 src/PIL/_imagingmorph.pyi diff --git a/pyproject.toml b/pyproject.toml index 54a4bcaec..8acfc0420 100644 --- a/pyproject.toml +++ b/pyproject.toml @@ -146,7 +146,6 @@ exclude = [ '^src/PIL/DdsImagePlugin.py$', '^src/PIL/FpxImagePlugin.py$', '^src/PIL/Image.py$', - '^src/PIL/ImageMorph.py$', '^src/PIL/ImageQt.py$', '^src/PIL/ImageShow.py$', '^src/PIL/ImImagePlugin.py$', diff --git a/src/PIL/ImageMorph.py b/src/PIL/ImageMorph.py index 282e7d2a5..534c6291a 100644 --- a/src/PIL/ImageMorph.py +++ b/src/PIL/ImageMorph.py @@ -62,12 +62,14 @@ class LutBuilder: """ - def __init__(self, patterns=None, op_name=None): + def __init__( + self, patterns: list[str] | None = None, op_name: str | None = None + ) -> None: if patterns is not None: self.patterns = patterns else: self.patterns = [] - self.lut = None + self.lut: bytearray | None = None if op_name is not None: known_patterns = { "corner": ["1:(... ... ...)->0", "4:(00. 01. ...)->1"], @@ -87,25 +89,27 @@ class LutBuilder: self.patterns = known_patterns[op_name] - def add_patterns(self, patterns): + def add_patterns(self, patterns: list[str]) -> None: self.patterns += patterns - def build_default_lut(self): + def build_default_lut(self) -> None: symbols = [0, 1] m = 1 << 4 # pos of current pixel self.lut = bytearray(symbols[(i & m) > 0] for i in range(LUT_SIZE)) - def get_lut(self): + def get_lut(self) -> bytearray | None: return self.lut - def _string_permute(self, pattern, permutation): + def _string_permute(self, pattern: str, permutation: list[int]) -> str: """string_permute takes a pattern and a permutation and returns the string permuted according to the permutation list. """ assert len(permutation) == 9 return "".join(pattern[p] for p in permutation) - def _pattern_permute(self, basic_pattern, options, basic_result): + def _pattern_permute( + self, basic_pattern: str, options: str, basic_result: int + ) -> list[tuple[str, int]]: """pattern_permute takes a basic pattern and its result and clones the pattern according to the modifications described in the $options parameter. It returns a list of all cloned patterns.""" @@ -135,12 +139,13 @@ class LutBuilder: return patterns - def build_lut(self): + def build_lut(self) -> bytearray: """Compile all patterns into a morphology lut. TBD :Build based on (file) morphlut:modify_lut """ self.build_default_lut() + assert self.lut is not None patterns = [] # Parse and create symmetries of the patterns strings @@ -159,10 +164,10 @@ class LutBuilder: patterns += self._pattern_permute(pattern, options, result) # compile the patterns into regular expressions for speed - for i, pattern in enumerate(patterns): + compiled_patterns = [] + for pattern in patterns: p = pattern[0].replace(".", "X").replace("X", "[01]") - p = re.compile(p) - patterns[i] = (p, pattern[1]) + compiled_patterns.append((re.compile(p), pattern[1])) # Step through table and find patterns that match. # Note that all the patterns are searched. The last one @@ -172,8 +177,8 @@ class LutBuilder: bitpattern = bin(i)[2:] bitpattern = ("0" * (9 - len(bitpattern)) + bitpattern)[::-1] - for p, r in patterns: - if p.match(bitpattern): + for pattern, r in compiled_patterns: + if pattern.match(bitpattern): self.lut[i] = [0, 1][r] return self.lut @@ -182,7 +187,12 @@ class LutBuilder: class MorphOp: """A class for binary morphological operators""" - def __init__(self, lut=None, op_name=None, patterns=None): + def __init__( + self, + lut: bytearray | None = None, + op_name: str | None = None, + patterns: list[str] | None = None, + ) -> None: """Create a binary morphological operator""" self.lut = lut if op_name is not None: @@ -190,7 +200,7 @@ class MorphOp: elif patterns is not None: self.lut = LutBuilder(patterns=patterns).build_lut() - def apply(self, image): + def apply(self, image: Image.Image): """Run a single morphological operation on an image Returns a tuple of the number of changed pixels and the @@ -206,7 +216,7 @@ class MorphOp: count = _imagingmorph.apply(bytes(self.lut), image.im.id, outimage.im.id) return count, outimage - def match(self, image): + def match(self, image: Image.Image): """Get a list of coordinates matching the morphological operation on an image. @@ -221,7 +231,7 @@ class MorphOp: raise ValueError(msg) return _imagingmorph.match(bytes(self.lut), image.im.id) - def get_on_pixels(self, image): + def get_on_pixels(self, image: Image.Image): """Get a list of all turned on pixels in a binary image Returns a list of tuples of (x,y) coordinates @@ -232,7 +242,7 @@ class MorphOp: raise ValueError(msg) return _imagingmorph.get_on_pixels(image.im.id) - def load_lut(self, filename): + def load_lut(self, filename: str) -> None: """Load an operator from an mrl file""" with open(filename, "rb") as f: self.lut = bytearray(f.read()) @@ -242,7 +252,7 @@ class MorphOp: msg = "Wrong size operator file!" raise Exception(msg) - def save_lut(self, filename): + def save_lut(self, filename: str) -> None: """Save an operator to an mrl file""" if self.lut is None: msg = "No operator loaded" @@ -250,6 +260,6 @@ class MorphOp: with open(filename, "wb") as f: f.write(self.lut) - def set_lut(self, lut): + def set_lut(self, lut: bytearray | None) -> None: """Set the lut from an external source""" self.lut = lut diff --git a/src/PIL/_imagingmorph.pyi b/src/PIL/_imagingmorph.pyi new file mode 100644 index 000000000..b0235555d --- /dev/null +++ b/src/PIL/_imagingmorph.pyi @@ -0,0 +1,5 @@ +from __future__ import annotations + +from typing import Any + +def __getattr__(name: str) -> Any: ...