Fixed #24979 -- Removed usage of inspect.getargspec().

1 files changed, 80 insertions, 0 deletions

diff --git a/django/utils/inspect.py b/django/utils/inspect.py
new file mode 100644
index 0000000000..3e3ad0ac23
--- /dev/null
+++ b/django/utils/inspect.py
@@ -0,0 +1,80 @@
+from __future__ import absolute_import
+
+import inspect
+
+from django.utils import six
+
+
+def getargspec(func):
+    if six.PY2:
+        return inspect.getargspec(func)
+
+    sig = inspect.signature(func)
+    args = [
+        p.name for p in sig.parameters.values()
+        if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD
+    ]
+    varargs = [
+        p.name for p in sig.parameters.values()
+        if p.kind == inspect.Parameter.VAR_POSITIONAL
+    ]
+    varargs = varargs[0] if varargs else None
+    varkw = [
+        p.name for p in sig.parameters.values()
+        if p.kind == inspect.Parameter.VAR_KEYWORD
+    ]
+    varkw = varkw[0] if varkw else None
+    defaults = [
+        p.default for p in sig.parameters.values()
+        if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD and p.default is not p.empty
+    ] or None
+    return args, varargs, varkw, defaults
+
+
+def get_func_args(func):
+    if six.PY2:
+        argspec = inspect.getargspec(func)
+        return argspec.args[1:]  # ignore 'self'
+
+    sig = inspect.signature(func)
+    return [
+        arg_name for arg_name, param in sig.parameters.items()
+        if param.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD
+    ]
+
+
+def func_accepts_kwargs(func):
+    if six.PY2:
+        # Not all callables are inspectable with getargspec, so we'll
+        # try a couple different ways but in the end fall back on assuming
+        # it is -- we don't want to prevent registration of valid but weird
+        # callables.
+        try:
+            argspec = inspect.getargspec(func)
+        except TypeError:
+            try:
+                argspec = inspect.getargspec(func.__call__)
+            except (TypeError, AttributeError):
+                argspec = None
+        return not argspec or argspec[2] is not None
+
+    return any(
+        p for p in inspect.signature(func).parameters.values()
+        if p.kind == p.VAR_KEYWORD
+    )
+
+
+def func_has_no_args(func):
+    args = inspect.getargspec(func)[0] if six.PY2 else [
+        p for p in inspect.signature(func).parameters.values()
+        if p.kind == p.POSITIONAL_OR_KEYWORD and p.default is p.empty
+    ]
+    return len(args) == 1
+
+
+def func_supports_parameter(func, parameter):
+    if six.PY3:
+        return parameter in inspect.signature(func).parameters
+    else:
+        args, varargs, varkw, defaults = inspect.getargspec(func)
+        return parameter in args