"""CherryPy Library"""
import sys as _sys
def modules(modulePath):
"""Load a module and retrieve a reference to that module."""
try:
mod = _sys.modules[modulePath]
if mod is None:
raise KeyError()
except KeyError:
# The last [''] is important.
mod = __import__(modulePath, globals(), locals(), [''])
return mod
def attributes(full_attribute_name):
"""Load a module and retrieve an attribute of that module."""
# Parse out the path, module, and attribute
last_dot = full_attribute_name.rfind(u".")
attr_name = full_attribute_name[last_dot + 1:]
mod_path = full_attribute_name[:last_dot]
mod = modules(mod_path)
# Let an AttributeError propagate outward.
try:
attr = getattr(mod, attr_name)
except AttributeError:
raise AttributeError("'%s' object has no attribute '%s'"
% (mod_path, attr_name))
# Return a reference to the attribute.
return attr
# public domain "unrepr" implementation, found on the web and then improved.
class _Builder:
def build(self, o):
m = getattr(self, 'build_' + o.__class__.__name__, None)
if m is None:
raise TypeError("unrepr does not recognize %s" %
repr(o.__class__.__name__))
return m(o)
def build_Subscript(self, o):
expr, flags, subs = o.getChildren()
expr = self.build(expr)
subs = self.build(subs)
return expr[subs]
def build_CallFunc(self, o):
children = map(self.build, o.getChildren())
callee = children.pop(0)
kwargs = children.pop() or {}
starargs = children.pop() or ()
args = tuple(children) + tuple(starargs)
return callee(*args, **kwargs)
def build_List(self, o):
return map(self.build, o.getChildren())
def build_Const(self, o):
return o.value
def build_Dict(self, o):
d = {}
i = iter(map(self.build, o.getChildren()))
for el in i:
d[el] = i.next()
return d
def build_Tuple(self, o):
return tuple(self.build_List(o))
def build_Name(self, o):
if o.name == 'None':
return None
if o.name == 'True':
return True
if o.name == 'False':
return False
# See if the Name is a package or module. If it is, import it.
try:
return modules(o.name)
except ImportError:
pass
# See if the Name is in __builtin__.
try:
import __builtin__
return getattr(__builtin__, o.name)
except AttributeError:
pass
raise TypeError("unrepr could not resolve the name %s" % repr(o.name))
def build_Add(self, o):
left, right = map(self.build, o.getChildren())
return left + right
def build_Getattr(self, o):
parent = self.build(o.expr)
return getattr(parent, o.attrname)
def build_NoneType(self, o):
return None
def build_UnarySub(self, o):
return -self.build(o.getChildren()[0])
def build_UnaryAdd(self, o):
return self.build(o.getChildren()[0])
def unrepr(s):
"""Return a Python object compiled from a string."""
if not s:
return s
try:
import compiler
except ImportError:
# Fallback to eval when compiler package is not available,
# e.g. IronPython 1.0.
return eval(s)
p = compiler.parse("__tempvalue__ = " + s)
obj = p.getChildren()[1].getChildren()[0].getChildren()[1]
return _Builder().build(obj)
def file_generator(input, chunkSize=65536):
"""Yield the given input (a file object) in chunks (default 64k). (Core)"""
chunk = input.read(chunkSize)
while chunk:
yield chunk
chunk = input.read(chunkSize)
input.close()
def file_generator_limited(fileobj, count, chunk_size=65536):
"""Yield the given file object in chunks, stopping after `count`
bytes has been emitted. Default chunk size is 64kB. (Core)
"""
remaining = count
while remaining > 0:
chunk = fileobj.read(min(chunk_size, remaining))
chunklen = len(chunk)
if chunklen == 0:
return
remaining -= chunklen
yield chunk
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