fixes #215

fastcore/_nbdev.py

@@ -103,17 +103,17 @@
          "instantiate": "01_basics.ipynb",
          "using_attr": "01_basics.ipynb",
          "Self": "01_basics.ipynb",
+         "copy_func": "01_basics.ipynb",
+         "patch_to": "01_basics.ipynb",
+         "patch": "01_basics.ipynb",
+         "patch_property": "01_basics.ipynb",
          "Stateful": "01_basics.ipynb",
          "PrettyString": "01_basics.ipynb",
          "even_mults": "01_basics.ipynb",
          "num_cpus": "01_basics.ipynb",
          "defaults.cpus": "01_basics.ipynb",
          "add_props": "01_basics.ipynb",
          "typed": "01_basics.ipynb",
-         "copy_func": "02_foundation.ipynb",
-         "patch_to": "02_foundation.ipynb",
-         "patch": "02_foundation.ipynb",
-         "patch_property": "02_foundation.ipynb",
          "working_directory": "02_foundation.ipynb",
          "add_docs": "02_foundation.ipynb",
          "docs": "02_foundation.ipynb",

fastcore/basics.py

@@ -10,11 +10,12 @@
            'filter_keys', 'filter_values', 'cycle', 'zip_cycle', 'sorted_ex', 'negate_func', 'argwhere', 'filter_ex',
            'range_of', 'renumerate', 'first', 'nested_attr', 'nested_idx', 'val2idx', 'uniqueify', 'num_methods',
            'rnum_methods', 'inum_methods', 'fastuple', 'arg0', 'arg1', 'arg2', 'arg3', 'arg4', 'bind', 'map_ex',
-           'compose', 'maps', 'partialler', 'instantiate', 'using_attr', 'Self', 'Self', 'Stateful', 'PrettyString',
-           'even_mults', 'num_cpus', 'add_props', 'typed']
+           'compose', 'maps', 'partialler', 'instantiate', 'using_attr', 'Self', 'Self', 'copy_func', 'patch_to',
+           'patch', 'patch_property', 'Stateful', 'PrettyString', 'even_mults', 'num_cpus', 'add_props', 'typed']
 
 # Cell
 from .imports import *
+import builtins
 
 # Cell
 defaults = SimpleNamespace()
@@ -688,6 +689,48 @@ def __call__(self,*args,**kwargs): return self.__getattr__('_call')(*args,**kwar
 # Cell
 #nbdev_comment _all_ = ['Self']
 
+# Cell
+def copy_func(f):
+    "Copy a non-builtin function (NB `copy.copy` does not work for this)"
+    if not isinstance(f,FunctionType): return copy(f)
+    fn = FunctionType(f.__code__, f.__globals__, f.__name__, f.__defaults__, f.__closure__)
+    fn.__kwdefaults__ = f.__kwdefaults__
+    fn.__dict__.update(f.__dict__)
+    return fn
+
+# Cell
+def patch_to(cls, as_prop=False, cls_method=False):
+    "Decorator: add `f` to `cls`"
+    if not isinstance(cls, (tuple,list)): cls=(cls,)
+    def _inner(f):
+        for c_ in cls:
+            nf = copy_func(f)
+            nm = f.__name__
+            # `functools.update_wrapper` when passing patched function to `Pipeline`, so we do it manually
+            for o in functools.WRAPPER_ASSIGNMENTS: setattr(nf, o, getattr(f,o))
+            nf.__qualname__ = f"{c_.__name__}.{nm}"
+            if cls_method:
+                setattr(c_, nm, MethodType(nf, c_))
+            else:
+                setattr(c_, nm, property(nf) if as_prop else nf)
+        # Avoid clobbering existing functions
+        return globals().get(nm, builtins.__dict__.get(nm, None))
+    return _inner
+
+# Cell
+def patch(f=None, *, as_prop=False, cls_method=False):
+    "Decorator: add `f` to the first parameter's class (based on f's type annotations)"
+    if f is None: return partial(patch, as_prop=as_prop, cls_method=cls_method)
+    cls = next(iter(f.__annotations__.values()))
+    return patch_to(cls, as_prop=as_prop, cls_method=cls_method)(f)
+
+# Cell
+def patch_property(f):
+    "Deprecated; use `patch(as_prop=True)` instead"
+    warnings.warn("`patch_property` is deprecated and will be removed; use `patch(as_prop=True)` instead")
+    cls = next(iter(f.__annotations__.values()))
+    return patch_to(cls, as_prop=True)(f)
+
 # Cell
 class Stateful:
     "A base class/mixin for objects that should not serialize all their state"

fastcore/foundation.py

@@ -1,8 +1,7 @@
 # AUTOGENERATED! DO NOT EDIT! File to edit: nbs/02_foundation.ipynb (unless otherwise specified).
 
-__all__ = ['copy_func', 'patch_to', 'patch', 'patch_property', 'working_directory', 'add_docs', 'docs', 'coll_repr',
-           'is_bool', 'mask2idxs', 'cycle', 'zip_cycle', 'is_indexer', 'GetAttr', 'delegate_attr', 'CollBase', 'L',
-           'save_config_file', 'read_config_file', 'Config']
+__all__ = ['working_directory', 'add_docs', 'docs', 'coll_repr', 'is_bool', 'mask2idxs', 'cycle', 'zip_cycle',
+           'is_indexer', 'GetAttr', 'delegate_attr', 'CollBase', 'L', 'save_config_file', 'read_config_file', 'Config']
 
 # Cell
 from .imports import *
@@ -13,46 +12,6 @@
 from configparser import ConfigParser
 import random,pickle
 
-# Cell
-def copy_func(f):
-    "Copy a non-builtin function (NB `copy.copy` does not work for this)"
-    if not isinstance(f,FunctionType): return copy(f)
-    fn = FunctionType(f.__code__, f.__globals__, f.__name__, f.__defaults__, f.__closure__)
-    fn.__kwdefaults__ = f.__kwdefaults__
-    fn.__dict__.update(f.__dict__)
-    return fn
-
-# Cell
-def patch_to(cls, as_prop=False, cls_method=False):
-    "Decorator: add `f` to `cls`"
-    if not isinstance(cls, (tuple,list)): cls=(cls,)
-    def _inner(f):
-        for c_ in cls:
-            nf = copy_func(f)
-            # `functools.update_wrapper` when passing patched function to `Pipeline`, so we do it manually
-            for o in functools.WRAPPER_ASSIGNMENTS: setattr(nf, o, getattr(f,o))
-            nf.__qualname__ = f"{c_.__name__}.{f.__name__}"
-            if cls_method:
-                setattr(c_, f.__name__, MethodType(nf, c_))
-            else:
-                setattr(c_, f.__name__, property(nf) if as_prop else nf)
-        return f
-    return _inner
-
-# Cell
-def patch(f=None, *, as_prop=False, cls_method=False):
-    "Decorator: add `f` to the first parameter's class (based on f's type annotations)"
-    if f is None: return partial(patch, as_prop=as_prop, cls_method=cls_method)
-    cls = next(iter(f.__annotations__.values()))
-    return patch_to(cls, as_prop=as_prop, cls_method=cls_method)(f)
-
-# Cell
-def patch_property(f):
-    "Deprecated; use `patch(as_prop=True)` instead"
-    warnings.warn("`patch_property` is deprecated and will be removed; use `patch(as_prop=True)` instead")
-    cls = next(iter(f.__annotations__.values()))
-    return patch_to(cls, as_prop=True)(f)
-
 # Cell
 @contextmanager
 def working_directory(path):

fastcore/xtras.py

@@ -299,14 +299,15 @@ def _socket_det(port,host,dgram):
     return family,addr,(socket.SOCK_STREAM,socket.SOCK_DGRAM)[dgram]
 
 # Cell
-def start_server(port, host=None, dgram=False, n_queue=None):
+def start_server(port, host=None, dgram=False, reuse_addr=True, n_queue=None):
     "Create a `socket` server on `port`, with optional `host`, of type `dgram`"
     listen_args = [n_queue] if n_queue else []
     family,addr,typ = _socket_det(port,host,dgram)
     if family==socket.AF_UNIX:
         if os.path.exists(addr): os.unlink(addr)
         assert not os.path.exists(addr), f"{addr} in use"
     s = socket.socket(family, typ)
+    if reuse_addr and family==socket.AF_INET: s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
     s.bind(addr)
     s.listen(*listen_args)
     return s