Source code for bw2parameters.utils

from typing import Union
import ast
import importlib.metadata




def isidentifier(ident):
    """Determines, if string is valid Python identifier.

    Stolen from http://stackoverflow.com/questions/12700893/how-to-check-if-a-string-is-a-valid-python-identifier-including-keyword-check"""

    if not isinstance(ident, str):
        raise TypeError("expected str, but got {!r}".format(type(ident)))

    # Resulting AST of simple identifier is <Module [<Expr <Name "foo">>]>
    try:
        root = ast.parse(ident)
    except SyntaxError:
        return False

    if (
        not isinstance(root, ast.Module)
        or len(root.body) != 1
        or not isinstance(root.body[0], ast.Expr)
        or not isinstance(root.body[0].value, ast.Name)
        or root.body[0].value.id != ident
    ):
        return False
    return True





def get_version_tuple() -> tuple:
    def as_integer(x: str) -> Union[int, str]:
        try:
            return int(x)
        except ValueError:
            return x

    return tuple(
        as_integer(v)
        for v in importlib.metadata.version("bw2parameters")
        .strip()
        .split(".")
    )