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Typing: Image.open

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This commit is contained in:
Eric Soroos 2018-01-05 14:09:57 +00:00
parent 4b241c4f5c
commit db0e083555
1 changed files with 15 additions and 12 deletions
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27
src/PIL/Image.py
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@ -2687,35 +2687,38 @@ def open(fp, mode="r"):
if mode != "r": if mode != "r":
raise ValueError("bad mode %r" % mode) raise ValueError("bad mode %r" % mode)
exclusive_fp = False # type: bool exclusive_fp = False
filename = "" filename = ""
_fp = None # type: BinaryIO
if isPath(fp): if isPath(fp):
filename = fp filename = str(fp)
elif HAS_PATHLIB and isinstance(fp, Path): elif HAS_PATHLIB and isinstance(fp, Path):
filename = str(fp.resolve()) filename = str(fp.resolve())
if filename: if filename:
fp = builtins.open(filename, "rb") _fp = builtins.open(filename, "rb")
exclusive_fp = True exclusive_fp = True
else:
_fp = fp # type: ignore
try: try:
fp.seek(0) _fp.seek(0)
except (AttributeError, io.UnsupportedOperation): except (AttributeError, io.UnsupportedOperation):
fp = io.BytesIO(fp.read()) _fp = io.BytesIO(_fp.read())
exclusive_fp = True exclusive_fp = True
prefix = fp.read(16) prefix = _fp.read(16)
preinit() preinit()
def _open_core(fp, filename, prefix): def _open_core(_fp, filename, prefix):
# type: (BinaryIO, Text, Text) -> Optional[ImageFile.ImageFile] # type: (BinaryIO, Text, Text) -> Optional[ImageFile.ImageFile]
for i in ID: for i in ID:
try: try:
factory, accept = OPEN[i] factory, accept = OPEN[i]
if not accept or accept(prefix): if not accept or accept(prefix):
fp.seek(0) _fp.seek(0)
im = factory(fp, filename) im = factory(_fp, filename)
_decompression_bomb_check(im.size) _decompression_bomb_check(im.size)
return im return im
except (SyntaxError, IndexError, TypeError, struct.error): except (SyntaxError, IndexError, TypeError, struct.error):
@ -2725,18 +2728,18 @@ def open(fp, mode="r"):
continue continue
return None return None
im = _open_core(fp, filename, prefix) im = _open_core(_fp, filename, prefix)
if im is None: if im is None:
if init(): if init():
im = _open_core(fp, filename, prefix) im = _open_core(_fp, filename, prefix)
if im: if im:
im._exclusive_fp = exclusive_fp im._exclusive_fp = exclusive_fp
return im return im
if exclusive_fp: if exclusive_fp:
fp.close() _fp.close()
raise IOError("cannot identify image file %r" raise IOError("cannot identify image file %r"
% (filename if filename else fp)) % (filename if filename else fp))