Remove import_from and SequenceLoader again

k4FWCore/python/k4FWCore/utils.py

@@ -19,53 +19,7 @@
 #
 import os
 from io import TextIOWrapper
-from typing import Union, Optional, Dict, Any
-import importlib.util
-import importlib.abc
-from importlib.machinery import SourceFileLoader
-
-
-def import_from(
-    filename: Union[str, os.PathLike],
-    module_name: Optional[str] = None,
-    global_vars: Optional[Dict[str, Any]] = None,
-) -> Any:
-    """Dynamically imports a module from the specified file path.
-
-    This function imports a module from a given filename, with the option to
-    specify the module's name and inject global variables into the module before
-    it is returned. If `module_name` is not provided, the filename is used as
-    the module name after replacing '.' with '_'. Global variables can be passed
-    as a dictionary to `global_vars`, which will be injected into the module's
-    namespace.
-
-    Args:
-        filename (str): The path to the file from which to import the module.
-        module_name (Optional[str]): The name to assign to the module. Defaults
-            to None, in which case the filename is used as the module name.
-        global_vars (Optional[Dict[str, Any]]): A dictionary of global variables
-            to inject into the module's namespace. Defaults to None.
-
-    Returns:
-        Any: The imported module with the specified modifications.
-
-    Raises:
-        FileNotFoundError: If the specified file does not exist.
-        ImportError: If there is an error during the import process.
-
-    """
-    filename = os.path.abspath(filename)
-    if not os.path.exists(filename):
-        raise FileNotFoundError(f"No such file: '{filename}'")
-
-    module_name = module_name or os.path.basename(filename).replace(".", "_")
-    loader = SourceFileLoader(module_name, filename)
-    spec = importlib.util.spec_from_loader(loader.name, loader)
-    module = importlib.util.module_from_spec(spec)
-    if global_vars:
-        module.__dict__.update(global_vars)
-    loader.exec_module(module)
-    return module
+from typing import Union
 
 
 def load_file(opt_file: Union[TextIOWrapper, str, os.PathLike]) -> None:
@@ -95,65 +49,3 @@ def load_file(opt_file: Union[TextIOWrapper, str, os.PathLike]) -> None:
         code = compile(opt_file.read(), opt_file.name, "exec")
 
     exec(code, globals())
-
-
-class SequenceLoader:
-    """A class for loading algorithm sequences onto a list of algorithms
-
-    It dynamically loads algorithms from Python files based on the given
-    sequence names. In the import process it will look for a Sequence of
-    algorithms which might have configuration constants that depend on some
-    global calibration configuration. These constants are provided during the
-    import of a sequence, such that the imported python files do not need to
-    define all of them.
-    """
-
-    def __init__(self, alg_list: list, global_vars: Optional[Dict[str, Any]] = None) -> None:
-        """Initialize the SequenceLoader
-
-        This initializes a SequenceLoader with the list of algorithms to which
-        dynamically loaded algorithms should be appended to. It optionally takes
-        some global calibration constants that should be injected during import
-        of the sequence files
-
-        Args:
-            alg_list (List): A list to store loaded sequence algorithms.
-            global_vars (Optional[Dict[str, Any]]): A dictionary of global
-                variables for the sequences. Defaults to None. The keys in this
-                dictionary will be the available variables in the imported
-                module and the values will be the values of these variables.
-        """
-        self.alg_list = alg_list
-        self.global_vars = global_vars
-
-    def load(self, sequence: str) -> None:
-        """Loads a sequence algorithm from a specified Python file and appends
-        it to the algorithm list
-
-        The method constructs the filename from the sequence parameter name and
-        imports the sequence from the imported module.
-
-        Args:
-            sequence (str): The name of the sequence to load. The sequence name
-                should correspond to a Python file and class name following the
-                pattern `{sequence}.py` and `{sequence}Sequence`, respectively.
-
-        Examples:
-            >>> alg_list = []
-            >>> seq_loader = SequenceLoader(alg_list)
-            >>> seq_loader.load("Tracking/TrackingDigi")
-
-            This will import the file `Tracking/TrackingDigi.py` and add the
-            sequence of algorithms that is defined in `TrackingDigiSequence` in
-            that file to the alg_list
-        """
-        filename = f"{sequence}.py"
-        seq_name = f"{sequence.split('/')[-1]}Sequence"
-
-        seq_module = import_from(
-            filename,
-            global_vars=self.global_vars,
-        )
-
-        seq = getattr(seq_module, seq_name)
-        self.alg_list.extend(seq)