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Google Research

This repository contains code released by Google Research.

All datasets in this repository are released under the CC BY 4.0 International license, which can be found here: https://creativecommons.org/licenses/by/4.0/legalcode. All source files in this repository are released under the Apache 2.0 license, the text of which can be found in the LICENSE file.

Because the repo is large, we recommend you download only the subdirectory of interest:

SUBDIR=foo
svn export https://github.com/google-research/google-research/trunk/$SUBDIR

If you'd like to submit a pull request, you'll need to clone the repository; we recommend making a shallow clone (without history).

git clone [email protected]:google-research/google-research.git --depth=1

Disclaimer: This is not an official Google product.

Updated in 2023.

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Python 3 compatibility

In Python 3:

parens are not allowed around lambda parameters
apply was removed from the language
reduce was moved into functools to encourage the use of comprehensions instead

flake8 testing of https://github.com/google-research/autoconj on Python 3.7.1

$ flake8 . --count --select=E901,E999,F821,F822,F823 --show-source --statistics

./autoconj/conjugacy.py:250:28: E999 SyntaxError: invalid syntax
  make_mean_init = (lambda (i, normalizer): lambda scale=1.:
                           ^
./autoconj/tracers.py:388:18: F821 undefined name 'apply'
  fun.fmap_out = apply
                 ^
./autoconj/tracers.py:516:10: F821 undefined name 'reduce'
  return reduce(np.add, args)
         ^
./autoconj/matchers.py:89:25: F821 undefined name 'reduce'
def _set(*elts): return reduce(operator.or_, map(_singleton, elts))
                        ^
./autoconj/matchers.py:248:51: F821 undefined name 'list_patterns'
    lambda pat: match_list(*map(make_combinators, list_patterns(pat))))
                                                  ^
./examples/mixture_of_gaussians_variational.py:123:46: F821 undefined name 'itr'
    plt.savefig('/tmp/gmm_{:04d}.png'.format(itr))
                                             ^
./examples/mixture_of_gaussians_variational_tensorflow.py:129:46: F821 undefined name 'itr'
    plt.savefig('/tmp/gmm_{:04d}.png'.format(itr))
                                             ^
1     E999 SyntaxError: invalid syntax
6     F821 undefined name 'reduce'
7

E901,E999,F821,F822,F823 are the "showstopper" flake8 issues that can halt the runtime with a SyntaxError, NameError, etc. These 5 are different from most other flake8 issues which are merely "style violations" -- useful for readability but they do not effect runtime safety.

F821: undefined name name
F822: undefined name name in __all__
F823: local variable name referenced before assignment
E901: SyntaxError or IndentationError
E999: SyntaxError -- failed to compile a file into an Abstract Syntax Tree

ImportError: cannot import name 'toposort'

Hey guys,

Very nice work!

It seems some of the functions are missing. Here is an example:

     44 from autograd.tracer import Node
---> 45 from autograd.util import toposort
     46 from autograd.util import subvals
     47 from autograd import core

ImportError: cannot import name 'toposort'

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Python 3 compatibility

ImportError: cannot import name 'toposort'

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