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diff --git a/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/INSTALLER b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/INSTALLER new file mode 100644 index 00000000..a1b589e3 --- /dev/null +++ b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/INSTALLER @@ -0,0 +1 @@ +pip diff --git a/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/LICENSE b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/LICENSE new file mode 100644 index 00000000..40c6623a --- /dev/null +++ b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/LICENSE @@ -0,0 +1,201 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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Lott +Author-email: slott56@gmail.com +Requires-Python: >=3.8,<4.0 +Classifier: Development Status :: 4 - Beta +Classifier: License :: Other/Proprietary License +Classifier: Programming Language :: Python +Classifier: Programming Language :: Python :: 3 +Classifier: Programming Language :: Python :: 3.8 +Classifier: Programming Language :: Python :: 3.9 +Classifier: Programming Language :: Python :: 3.10 +Classifier: Programming Language :: Python :: 3.11 +Classifier: Programming Language :: Python :: 3.12 +Classifier: Programming Language :: Python :: 3.13 +Requires-Dist: jmespath (>=1.0.1,<2.0.0) +Requires-Dist: lark (>=0.12.0,<0.13.0) +Requires-Dist: python-dateutil (>=2.9.0.post0,<3.0.0) +Requires-Dist: pyyaml (>=6.0.1,<7.0.0) +Requires-Dist: types-python-dateutil (>=2.9.0.20240316,<3.0.0.0) +Requires-Dist: types-pyyaml (>=6.0.12.20240311,<7.0.0.0) +Description-Content-Type: text/x-rst + +########## +cel-python +########## + +.. image:: https://img.shields.io/pypi/v/cel-python.svg + :target: https://pypi.org/projects/cel-python/ + :alt: PyPI: cel-python + +.. image:: https://github.com/cloud-custodian/cel-python/workflows/CI/badge.svg + :target: https://github.com/cloud-custodian/cel-python/actions + :alt: GitHub Actions Build Status + +.. image:: https://img.shields.io/badge/license-Apache%202-blue.svg + :target: https://www.apache.org/licenses/LICENSE-2.0 + :alt: Apache License + +Pure Python implementation of Google Common Expression Language, https://opensource.google/projects/cel. + + The Common Expression Language (CEL) implements common semantics for expression evaluation, + enabling different applications to more easily interoperate. + + Key Applications + + Security policy: organization have complex infrastructure and need common tooling to reason about the system as a whole + + Protocols: expressions are a useful data type and require interoperability across programming languages and platforms. + +This implementation has minimal dependencies, runs quickly, and can be embedded into Python-based applications. +Specifically, the intent is to be part of Cloud Custodian, C7N, as part of the security policy filter. + +Installation +============= + +:: + + pip install cel-python + +You now have the CEL run-time available to Python-based applications. + +Command Line +============ + +We can read JSON directly from stdin, making this a bit like ``jq``. + +:: + + % python -m celpy '.this.from.json * 3 + 3' <<EOF + heredoc> {"this": {"from": {"json": 13}}} + heredoc> EOF + 42 + + +It's also a desk calculator, like ``expr``, but with float values: + +:: + + % python -m celpy -n '355.0 / 113.0' + 3.1415929203539825 + +It's not as sophistcated as ``bc``. +But, yes, this has a tiny advantage over ``python -c '355/113'``. Most notably, the ability +to embed Google CEL into other contexts where you don't *really* want Python's power. + +It's also capable of decision-making, like ``test``: + +:: + + % echo '{"status": 3}' | python -m celpy -sb '.status == 0' + false + % echo $? + 1 + +We can provide a ``-a`` option to define objects with specific data types. +This is particularly helpful for providing protobuf message definitions. + +:: + + python -m celpy -n --arg x:int=6 --arg y:int=7 'x*y' + 42 + +If you want to see details of evaluation, use ``-v``. + +:: + + python -m celpy -v -n '[2, 4, 6].map(n, n/2)' + ... a lot of output + [1, 2, 3] + +Library +======= + +To follow the pattern defined in the Go implementation, there's a multi-step +process for compiling a CEL expression to create a runnable "program". This program +can then be applied to argument values. + +:: + + >>> import celpy + >>> cel_source = """ + ... account.balance >= transaction.withdrawal + ... || (account.overdraftProtection + ... && account.overdraftLimit >= transaction.withdrawal - account.balance) + ... """ + + >>> env = celpy.Environment() + >>> ast = env.compile(cel_source) + >>> prgm = env.program(ast) + + >>> activation = { + ... "account": celpy.json_to_cel({"balance": 500, "overdraftProtection": False}), + ... "transaction": celpy.json_to_cel({"withdrawal": 600}) + ... } + >>> result = prgm.evaluate(activation) + >>> result + BoolType(False) + +The Python classes are generally based on the object model in https://github.com/google/cel-go +These types semantics are slightly different from Python's native semantics. +Type coercion is not generally done. +Python ``//`` truncates toward negative infinity. Go (and CEL) ``/`` truncates toward zero. + + +Development +=========== + +The parser is based on the grammars used by Go and C++, but processed through Python Lark. + +See https://github.com/google/cel-spec/blob/master/doc/langdef.md + +https://github.com/google/cel-cpp/blob/master/parser/Cel.g4 + +https://github.com/google/cel-go/blob/master/parser/gen/CEL.g4 + +Notes +===== + + +CEL provides a number of runtime errors that are mapped to Python exceptions. + +- ``no_matching_overload``: this function has no overload for the types of the arguments. +- ``no_such_field``: a map or message does not contain the desired field. +- ``return error for overflow``: integer arithmetic overflows + +There are mapped to Python ``celpy.evaluation.EvalError`` exception. The args will have +a message similar to the CEL error message, as well as an underlying Python exception. + +In principle CEL can pre-check types. +However, see https://github.com/google/cel-spec/blob/master/doc/langdef.md#gradual-type-checking. +Rather than try to pre-check types, we'll rely on Python's implementation. + + +Contributing +============ + +See https://cloudcustodian.io/docs/contribute.html + + +Code of Conduct +=============== + +This project adheres to the `Open Code of Conduct <https://developer.capitalone.com/resources/code-of-conduct>`_. By +participating, you are expected to honor this code. + diff --git a/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/RECORD b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/RECORD new file mode 100644 index 00000000..75b124dd --- /dev/null +++ b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/RECORD @@ -0,0 +1,21 @@ +cel_python-0.2.0.dist-info/INSTALLER,sha256=zuuue4knoyJ-UwPPXg8fezS7VCrXJQrAP7zeNuwvFQg,4 +cel_python-0.2.0.dist-info/LICENSE,sha256=jK6QWvmedAMKK3fZ0futhSo-sj6eMKMnuCx7EVx_4Ig,11355 +cel_python-0.2.0.dist-info/METADATA,sha256=G0AyOJDIYmQE55e-36oNJKE54OTSCQVYM2OI1VClUT4,5965 +cel_python-0.2.0.dist-info/RECORD,, +cel_python-0.2.0.dist-info/WHEEL,sha256=Nq82e9rUAnEjt98J6MlVmMCZb-t9cYE2Ir1kpBmnWfs,88 +celpy/__init__.py,sha256=ElX1XBRNOdBZhF44vCkoJdwb7LSyECQ7hf1f0LgVCGo,10260 +celpy/__main__.py,sha256=7k_iyW1r-E30tvuOUIptKKfvpkWN8JYQB_sEKgAwfdc,16668 +celpy/__pycache__/__init__.cpython-312.pyc,, +celpy/__pycache__/__main__.cpython-312.pyc,, +celpy/__pycache__/adapter.cpython-312.pyc,, +celpy/__pycache__/c7nlib.cpython-312.pyc,, +celpy/__pycache__/celparser.cpython-312.pyc,, +celpy/__pycache__/celtypes.cpython-312.pyc,, +celpy/__pycache__/evaluation.cpython-312.pyc,, +celpy/adapter.py,sha256=bmsP8GdAvQDUHIqCrDlC23TGUyzeD99VSoTLQWlDtms,5435 +celpy/c7nlib.py,sha256=Kuoe21q-NhKJdA41l1Uw7roZw_76XnhkAQpFbl84u5M,53426 +celpy/cel.lark,sha256=gLc1UE_N-OmNfo0W7U-Qt00pBk5qymaLwt5aKXpQsA8,6246 +celpy/celparser.py,sha256=UdiI1HSsg01hCLeYR7WmiIzO1rXYSbcPqPmgwSEO21U,12917 +celpy/celtypes.py,sha256=vU_ysYF5h5r18vFFJCy7ITNlIvxsuFF46G7VP5E-BcM,49423 +celpy/evaluation.py,sha256=f_moQJ02EC3N0hceJyB34jvRRfs9d9Ez6jWG9gIzqc8,97741 +celpy/py.typed,sha256=47DEQpj8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU,0 diff --git a/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/WHEEL b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/WHEEL new file mode 100644 index 00000000..8b9b3a1b --- /dev/null +++ b/.venv/lib/python3.12/site-packages/cel_python-0.2.0.dist-info/WHEEL @@ -0,0 +1,4 @@ +Wheel-Version: 1.0 +Generator: poetry-core 1.9.1 +Root-Is-Purelib: true +Tag: py3-none-any |