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# Generic helpers for working with a Python executable.

import hashlib

from pyperformance import _pythoninfo

def get_id(python=None, prefix=None, *, short=True):

"""Return a string that uniquely identifies the given Python executable."""

if isinstance(python, str):

python = _pythoninfo.get_info(python)

data = [

# "executable" represents the install location

# (and build, to an extent).

python.sys.executable,

# sys.version encodes version, git info, build_date, and build_tool.

python.sys.version,

python.sys.implementation.name.lower(),

".".join(str(v) for v in python.sys.implementation.version),

str(python.sys.api_version),

python.pyc_magic_number.hex(),

]

# XXX Add git info if a dev build.

h = hashlib.sha256()

for value in data:

h.update(value.encode("utf-8"))

# XXX Also include the sorted output of "python -m pip freeze"?

py_id = h.hexdigest()

if short:

py_id = py_id[:12]

if prefix:

if prefix is True:

major, minor = python.sys.version_info[:2]

py_id = f"{python.sys.implementation.name}{major}.{minor}-{py_id}"

else:

py_id = prefix + py_id

return py_id

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