objax.util package¶
objax.util¶
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Custom dictionary that allows to access dict values as attributes. |
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Helper class for renaming string contents. |
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Returns the indexes of variable names of a function. |
Empty Context Manager. |
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Integer log2. |
Returns the ordered names of the positional arguments of a function. |
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Converts input to tuple. |
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class
objax.util.
EasyDict
(*args, **kwargs)[source]¶ Custom dictionary that allows to access dict values as attributes.
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clear
() → None. Remove all items from D.¶
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copy
() → a shallow copy of D¶
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fromkeys
(value=None, /)¶ Create a new dictionary with keys from iterable and values set to value.
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get
(key, default=None, /)¶ Return the value for key if key is in the dictionary, else default.
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items
() → a set-like object providing a view on D’s items¶
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keys
() → a set-like object providing a view on D’s keys¶
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pop
(k[, d]) → v, remove specified key and return the corresponding value.¶ If key is not found, d is returned if given, otherwise KeyError is raised
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popitem
() → (k, v), remove and return some (key, value) pair as a¶ 2-tuple; but raise KeyError if D is empty.
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setdefault
(key, default=None, /)¶ Insert key with a value of default if key is not in the dictionary.
Return the value for key if key is in the dictionary, else default.
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update
([E, ]**F) → None. Update D from dict/iterable E and F.¶ If E is present and has a .keys() method, then does: for k in E: D[k] = E[k] If E is present and lacks a .keys() method, then does: for k, v in E: D[k] = v In either case, this is followed by: for k in F: D[k] = F[k]
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values
() → an object providing a view on D’s values¶
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class
objax.util.
Renamer
(rules, chain=None)[source]¶ Helper class for renaming string contents.
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objax.util.
args_indexes
(f, args)[source]¶ Returns the indexes of variable names of a function.
- Parameters
f (Callable) –
args (Iterable[str]) –
- Return type
Iterable[int]
objax.util.image¶
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Converts an array in (N,H,W,C) format to (N,C,H,W) format. |
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Converts an array in (N,C,H,W) format to (N,H,W,C) format. |
Map a float image in [1/256-1, 1-1/256] to uint8 {0, 1, …, 255}. |
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Map an uint8 image in {0, 1, …, 255} to float interval [1/256-1, 1-1/256]. |
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Converts numpy array in (C,H,W) format into PNG format. |
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objax.util.image.
from_file
(file)[source]¶ Read an image from a file, convert it RGB and return it as an array.
- Parameters
file (Union[str, IO[BinaryIO]]) – filename or python file handle of the input file.
- Returns
3D numpy array (C, H, W) normalized with normalize_to_unit_float.
- Return type
numpy.ndarray
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objax.util.image.
image_grid
(image)[source]¶ Rearrange array of images (nh, hw, c, h, w) into image grid in a single image (c, nh * h, nh * w).
- Parameters
image (numpy.ndarray) –
- Return type
numpy.ndarray
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objax.util.image.
nchw
(x)[source]¶ Converts an array in (N,H,W,C) format to (N,C,H,W) format.
- Parameters
x (Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]) –
- Return type
Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]
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objax.util.image.
nhwc
(x)[source]¶ Converts an array in (N,C,H,W) format to (N,H,W,C) format.
- Parameters
x (Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]) –
- Return type
Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]
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objax.util.image.
normalize_to_uint8
(x)[source]¶ Map a float image in [1/256-1, 1-1/256] to uint8 {0, 1, …, 255}.
- Parameters
x (Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]) –
- Return type
Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]
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objax.util.image.
normalize_to_unit_float
(x)[source]¶ Map an uint8 image in {0, 1, …, 255} to float interval [1/256-1, 1-1/256].
- Parameters
x (Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]) –
- Return type
Union[numpy.ndarray, jax.numpy.lax_numpy.ndarray, jax.interpreters.xla.DeviceArray, jax.interpreters.pxla.ShardedDeviceArray]