remove obselete import implementation #7287
This commit is contained in:
parent
6003ff7633
commit
aa96592a59
|
@ -1,123 +0,0 @@
|
|||
"""An Python re-implementation of hierarchical module import.
|
||||
|
||||
This code is intended to be read, not executed. However, it does work
|
||||
-- all you need to do to enable it is "import knee".
|
||||
|
||||
(The name is a pun on the klunkier predecessor of this module, "ni".)
|
||||
|
||||
"""
|
||||
|
||||
import sys, imp, builtins
|
||||
|
||||
|
||||
# Replacement for __import__()
|
||||
def import_hook(name, globals=None, locals=None, fromlist=None):
|
||||
parent = determine_parent(globals)
|
||||
q, tail = find_head_package(parent, name)
|
||||
m = load_tail(q, tail)
|
||||
if not fromlist:
|
||||
return q
|
||||
if hasattr(m, "__path__"):
|
||||
ensure_fromlist(m, fromlist)
|
||||
return m
|
||||
|
||||
def determine_parent(globals):
|
||||
if not globals or "__name__" not in globals:
|
||||
return None
|
||||
pname = globals['__name__']
|
||||
if "__path__" in globals:
|
||||
parent = sys.modules[pname]
|
||||
assert globals is parent.__dict__
|
||||
return parent
|
||||
if '.' in pname:
|
||||
i = pname.rfind('.')
|
||||
pname = pname[:i]
|
||||
parent = sys.modules[pname]
|
||||
assert parent.__name__ == pname
|
||||
return parent
|
||||
return None
|
||||
|
||||
def find_head_package(parent, name):
|
||||
if '.' in name:
|
||||
i = name.find('.')
|
||||
head = name[:i]
|
||||
tail = name[i+1:]
|
||||
else:
|
||||
head = name
|
||||
tail = ""
|
||||
if parent:
|
||||
qname = "%s.%s" % (parent.__name__, head)
|
||||
else:
|
||||
qname = head
|
||||
q = import_module(head, qname, parent)
|
||||
if q: return q, tail
|
||||
if parent:
|
||||
qname = head
|
||||
parent = None
|
||||
q = import_module(head, qname, parent)
|
||||
if q: return q, tail
|
||||
raise ImportError("No module named " + qname)
|
||||
|
||||
def load_tail(q, tail):
|
||||
m = q
|
||||
while tail:
|
||||
i = tail.find('.')
|
||||
if i < 0: i = len(tail)
|
||||
head, tail = tail[:i], tail[i+1:]
|
||||
mname = "%s.%s" % (m.__name__, head)
|
||||
m = import_module(head, mname, m)
|
||||
if not m:
|
||||
raise ImportError("No module named " + mname)
|
||||
return m
|
||||
|
||||
def ensure_fromlist(m, fromlist, recursive=0):
|
||||
for sub in fromlist:
|
||||
if sub == "*":
|
||||
if not recursive:
|
||||
try:
|
||||
all = m.__all__
|
||||
except AttributeError:
|
||||
pass
|
||||
else:
|
||||
ensure_fromlist(m, all, 1)
|
||||
continue
|
||||
if sub != "*" and not hasattr(m, sub):
|
||||
subname = "%s.%s" % (m.__name__, sub)
|
||||
submod = import_module(sub, subname, m)
|
||||
if not submod:
|
||||
raise ImportError("No module named " + subname)
|
||||
|
||||
def import_module(partname, fqname, parent):
|
||||
try:
|
||||
return sys.modules[fqname]
|
||||
except KeyError:
|
||||
pass
|
||||
try:
|
||||
fp, pathname, stuff = imp.find_module(partname,
|
||||
parent and parent.__path__)
|
||||
except ImportError:
|
||||
return None
|
||||
try:
|
||||
m = imp.load_module(fqname, fp, pathname, stuff)
|
||||
finally:
|
||||
if fp: fp.close()
|
||||
if parent:
|
||||
setattr(parent, partname, m)
|
||||
return m
|
||||
|
||||
|
||||
def reload(module):
|
||||
name = module.__name__
|
||||
if '.' not in name:
|
||||
return import_module(name, name, None)
|
||||
i = name.rfind('.')
|
||||
pname = name[:i]
|
||||
parent = sys.modules[pname]
|
||||
return import_module(name[i+1:], name, parent)
|
||||
|
||||
|
||||
# Save the original hooks
|
||||
original_import = builtins.__import__
|
||||
|
||||
# Now install our hooks
|
||||
builtins.__import__ = import_hook
|
Loading…
Reference in New Issue