maturin 0.7.2

Build and publish crates with pyo3, rust-cpython and cffi bindings as well as rust binaries as python packages
Documentation 
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import json
import platform
import sys
import sysconfig

metadata = {
    "major": sys.version_info.major,
    "minor": sys.version_info.minor,
    "abiflags": sysconfig.get_config_var("ABIFLAGS"),
    "interpreter": platform.python_implementation().lower(),
    "ext_suffix": sysconfig.get_config_var("EXT_SUFFIX"),
    "abi_tag": (sysconfig.get_config_var("SOABI") or "-").split("-")[1] or None,
    "m": sysconfig.get_config_var("WITH_PYMALLOC") == 1,
    "u": sysconfig.get_config_var("Py_UNICODE_SIZE") == 4,
    "d": sysconfig.get_config_var("Py_DEBUG") == 1,
    # This one isn't technically necessary, but still very useful for sanity checks
    "platform": platform.system().lower(),
}

print(json.dumps(metadata))