centralize python12 backwards compatibility function

bin/all_sky_search/pycbc_cut_merge_triggers_to_tmpltbank

@@ -26,19 +26,7 @@ import numpy
 import h5py
 import pycbc
 from pycbc.io import HFile
-
-import importlib.util
-import importlib.machinery
-
-def load_source(modname, filename):
-    loader = importlib.machinery.SourceFileLoader(modname, filename)
-    spec = importlib.util.spec_from_file_location(modname, filename, loader=loader)
-    module = importlib.util.module_from_spec(spec)
-    # The module is always executed and not cached in sys.modules.
-    # Uncomment the following line to cache the module.
-    # sys.modules[module.__name__] = module
-    loader.exec_module(module)
-    return module
+from pycbc import load_source
 
 parser = argparse.ArgumentParser(description=__doc__)
 pycbc.add_common_pycbc_options(parser)

bin/all_sky_search/pycbc_reduce_template_bank

@@ -26,19 +26,7 @@ import logging
 import argparse
 import pycbc
 from pycbc.io import HFile
-
-import importlib.util
-import importlib.machinery
-
-def load_source(modname, filename):
-    loader = importlib.machinery.SourceFileLoader(modname, filename)
-    spec = importlib.util.spec_from_file_location(modname, filename, loader=loader)
-    module = importlib.util.module_from_spec(spec)
-    # The module is always executed and not cached in sys.modules.
-    # Uncomment the following line to cache the module.
-    # sys.modules[module.__name__] = module
-    loader.exec_module(module)
-    return module
+from pycbc import load_source
 
 parser = argparse.ArgumentParser(description=__doc__)
 pycbc.add_common_pycbc_options(parser)

bin/pycbc_banksim_match_combine

@@ -32,19 +32,7 @@ from pycbc import pnutils
 from pycbc.waveform import TemplateBank
 from pycbc.io.ligolw import LIGOLWContentHandler
 from pycbc.io.hdf import HFile
-
-import importlib.util
-import importlib.machinery
-
-def load_source(modname, filename):
-    loader = importlib.machinery.SourceFileLoader(modname, filename)
-    spec = importlib.util.spec_from_file_location(modname, filename, loader=loader)
-    module = importlib.util.module_from_spec(spec)
-    # The module is always executed and not cached in sys.modules.
-    # Uncomment the following line to cache the module.
-    # sys.modules[module.__name__] = module
-    loader.exec_module(module)
-    return module
+from pycbc import load_source
 
 __author__  = "Ian Harry <[email protected]>"
 __version__ = pycbc.version.git_verbose_msg

pycbc/__init__.py

@@ -32,6 +32,8 @@
 import logging
 import random
 import string
+import importlib.util
+import importlib.machinery
 from datetime import datetime as dt
 
 try:
@@ -227,3 +229,15 @@ def gps_now():
     from astropy.time import Time
 
     return float(Time.now().gps)
+
+# This is needed as a backwards compatibility. The function was removed in 
+# python 3.12.
+def load_source(modname, filename):
+    loader = importlib.machinery.SourceFileLoader(modname, filename)
+    spec = importlib.util.spec_from_file_location(modname, filename, loader=loader)
+    module = importlib.util.module_from_spec(spec)
+    # The module is always executed and not cached in sys.modules.
+    # Uncomment the following line to cache the module.
+    # sys.modules[module.__name__] = module
+    loader.exec_module(module)
+    return module