asm

asm/venv/lib/python3.11/site-packages/spyder_kernels/utils/lazymodules.py

@@ -0,0 +1,69 @@
+# -*- coding: utf-8 -*-
+# -----------------------------------------------------------------------------
+# Copyright (c) 2009- Spyder Kernels Contributors
+#
+# Licensed under the terms of the MIT License
+# (see spyder_kernels/__init__.py for details)
+# -----------------------------------------------------------------------------
+
+"""
+Lazy modules.
+
+They are useful to not import big modules until it's really necessary.
+"""
+
+from spyder_kernels.utils.misc import is_module_installed
+
+
+# =============================================================================
+# Auxiliary classes
+# =============================================================================
+class FakeObject(object):
+    """Fake class used in replacement of missing objects"""
+    pass
+
+
+class LazyModule(object):
+    """Lazy module loader class."""
+
+    def __init__(self, modname, second_level_attrs=None):
+        """
+        Lazy module loader class.
+
+        Parameters
+        ----------
+        modname: str
+            Module name to lazy load.
+        second_level_attrs: list (optional)
+            List of second level attributes to add to the FakeObject
+            that stands for the module in case it's not found.
+        """
+        self.__spy_modname__ = modname
+        self.__spy_mod__ = FakeObject
+
+        # Set required second level attributes
+        if second_level_attrs is not None:
+            for attr in second_level_attrs:
+                setattr(self.__spy_mod__, attr, FakeObject)
+
+    def __getattr__(self, name):
+        if is_module_installed(self.__spy_modname__):
+            self.__spy_mod__ = __import__(self.__spy_modname__)
+        else:
+            return self.__spy_mod__
+
+        return getattr(self.__spy_mod__, name)
+
+
+# =============================================================================
+# Lazy modules
+# =============================================================================
+numpy = LazyModule('numpy', ['MaskedArray'])
+
+pandas = LazyModule('pandas')
+
+PIL = LazyModule('PIL.Image', ['Image'])
+
+bs4 = LazyModule('bs4', ['NavigableString'])
+
+scipy = LazyModule('scipy.io')