twisted.python.reflect

Standardized versions of various cool and/or strange things that you can do with Python's reflection capabilities.

Function	fullyQualifiedName	Return the fully qualified name of a module, class, method or function. Classes and functions need to be module level ones to be correctly qualified.
Function	prefixedMethodNames	Given a class object `classObj`, returns a list of method names that match the string `prefix`.
Function	addMethodNamesToDict	This goes through `classObj` (and its bases) and puts method names starting with 'prefix' in 'dict' with a value of 1. if baseClass isn't None, methods will only be added if classObj is-a baseClass
Function	prefixedMethods	Given an object `obj`, returns a list of method objects that match the string `prefix`.
Function	accumulateMethods	Given an object `obj`, add all methods that begin with `prefix`.
Function	namedModule	Return a module given its name.
Function	namedObject	Get a fully named module-global object.
Function	requireModule	Try to import a module given its name, returning `default` value if `ImportError` is raised during import.
Class	InvalidName	The given name is not a dot-separated list of Python objects.
Class	ModuleNotFound	The module associated with the given name doesn't exist and it can't be imported.
Class	ObjectNotFound	The object associated with the given name doesn't exist and it can't be imported.
Function	namedAny	No summary
Function	filenameToModuleName	Convert a name in the filesystem to the name of the Python module it is.
Function	qual	Return full import path of a class.
Function	safe_repr	Returns a string representation of an object, or a string containing a traceback, if that object's __repr__ raised an exception.
Function	safe_str	Returns a string representation of an object, or a string containing a traceback, if that object's __str__ raised an exception.
Class	QueueMethod	I represent a method that doesn't exist yet.
Function	fullFuncName	Undocumented
Function	getClass	Return the class or type of object 'obj'. Returns sensible result for oldstyle and newstyle instances and types.
Function	accumulateClassDict	Accumulate all attributes of a given name in a class hierarchy into a single dictionary.
Function	accumulateClassList	Accumulate all attributes of a given name in a class hierarchy into a single list.
Function	isSame	Undocumented
Function	isLike	Undocumented
Function	modgrep	Undocumented
Function	isOfType	Undocumented
Function	findInstances	Undocumented
Function	objgrep	An insanely CPU-intensive process for finding stuff.
Class	_NoModuleFound	No module was found because none exists.
Function	_importAndCheckStack	No summary
Function	_determineClass	Undocumented
Function	_determineClassName	Undocumented
Function	_safeFormat	Helper function for `safe_repr` and `safe_str`.

def fullyQualifiedName(obj):

Return the fully qualified name of a module, class, method or function. Classes and functions need to be module level ones to be correctly qualified.

Returns (type: str.)

def prefixedMethodNames(classObj, prefix):

Given a class object classObj, returns a list of method names that match the string prefix.

Parameters	classObj	A class object from which to collect method names.
	prefix	A native string giving a prefix. Each method with a name which begins with this prefix will be returned. (type: `str`)
Returns	A list of the names of matching methods of `classObj` (and base classes of `classObj`). (type: `list` of `str`)

def addMethodNamesToDict(classObj, dict, prefix, baseClass=None):

This goes through classObj (and its bases) and puts method names starting with 'prefix' in 'dict' with a value of 1. if baseClass isn't None, methods will only be added if classObj is-a baseClass

If the class in question has the methods 'prefix_methodname' and 'prefix_methodname2', the resulting dict should look something like: {"methodname": 1, "methodname2": 1}.

Parameters	classObj	A class object from which to collect method names.
	dict	A `dict` which will be updated with the results of the accumulation. Items are added to this dictionary, with method names as keys and `1` as values. (type: `dict`)
	prefix	A native string giving a prefix. Each method of `classObj` (and base classes of `classObj`) with a name which begins with this prefix will be returned. (type: `str`)
	baseClass	A class object at which to stop searching upwards for new methods. To collect all method names, do not pass a value for this parameter.
Returns	`None`

def prefixedMethods(obj, prefix=''):

Given an object obj, returns a list of method objects that match the string prefix.

Parameters	obj	An arbitrary object from which to collect methods.
	prefix	A native string giving a prefix. Each method of `obj` with a name which begins with this prefix will be returned. (type: `str`)
Returns	A list of the matching method objects. (type: `list`)

def accumulateMethods(obj, dict, prefix='', curClass=None):

Given an object obj, add all methods that begin with prefix.

Parameters	obj	An arbitrary object to collect methods from.
	dict	A `dict` which will be updated with the results of the accumulation. Items are added to this dictionary, with method names as keys and corresponding instance method objects as values. (type: `dict`)
	prefix	A native string giving a prefix. Each method of `obj` with a name which begins with this prefix will be returned. (type: `str`)
	curClass	The class in the inheritance hierarchy at which to start collecting methods. Collection proceeds up. To collect all methods from `obj`, do not pass a value for this parameter.
Returns	`None`

def namedModule(name):

Return a module given its name.

def namedObject(name):

Get a fully named module-global object.

def requireModule(name, default=None):

Try to import a module given its name, returning default value if ImportError is raised during import.

Parameters	name	Module name as it would have been passed to `import`. (type: `str`.)
	default	Value returned in case `ImportError` is raised while importing the module.
Returns	Module or default value.

def _importAndCheckStack(importName):

Import the given name as a module, then walk the stack to determine whether the failure was the module not existing, or some code in the module (for example a dependent import) failing. This can be helpful to determine whether any actual application code was run. For example, to distiguish administrative error (entering the wrong module name), from programmer error (writing buggy code in a module that fails to import).

Parameters	importName	The name of the module to import. (type: `str`)
Raises	Exception	if something bad happens. This can be any type of exception, since nobody knows what loading some arbitrary code might do.
	_NoModuleFound	if no module was found.

def namedAny(name):

Retrieve a Python object by its fully qualified name from the global Python module namespace. The first part of the name, that describes a module, will be discovered and imported. Each subsequent part of the name is treated as the name of an attribute of the object specified by all of the name which came before it. For example, the fully-qualified name of this object is 'twisted.python.reflect.namedAny'.

Parameters	name	The name of the object to return. (type: `str`)
Returns	the Python object identified by 'name'.
Raises	InvalidName	If the name is an empty string, starts or ends with a '.', or is otherwise syntactically incorrect.
	ModuleNotFound	If the name is syntactically correct but the module it specifies cannot be imported because it does not appear to exist.
	ObjectNotFound	If the name is syntactically correct, includes at least one '.', but the module it specifies cannot be imported because it does not appear to exist.
	AttributeError	If an attribute of an object along the way cannot be accessed, or a module along the way is not found.

def filenameToModuleName(fn):

Convert a name in the filesystem to the name of the Python module it is.

This is aggressive about getting a module name back from a file; it will always return a string. Aggressive means 'sometimes wrong'; it won't look at the Python path or try to do any error checking: don't use this method unless you already know that the filename you're talking about is a Python module.

Parameters	fn	A filesystem path to a module or package; `bytes` on Python 2, `bytes` or `unicode` on Python 3.
Returns	A hopefully importable module name. (type: `str`)

def qual(clazz):

Return full import path of a class.

def _determineClass(x):

Undocumented

def _determineClassName(x):

Undocumented

def _safeFormat(formatter, o):

Helper function for safe_repr and safe_str.

Called when repr or str fail. Returns a string containing info about o and the latest exception.

Parameters	formatter	`str` or `repr`. (type: `type`)
	o	Any object.
Returns	A string containing information about `o` and the raised exception. (type: `str`)

def safe_repr(o):

Returns a string representation of an object, or a string containing a traceback, if that object's __repr__ raised an exception.

Parameters	o	Any object.
Returns	(type: `str`)

def safe_str(o):

Returns a string representation of an object, or a string containing a traceback, if that object's __str__ raised an exception.

Parameters	o	Any object.
Returns	(type: `str`)

def fullFuncName(func):

Undocumented

def getClass(obj):

Return the class or type of object 'obj'. Returns sensible result for oldstyle and newstyle instances and types.

def accumulateClassDict(classObj, attr, adict, baseClass=None):

Accumulate all attributes of a given name in a class hierarchy into a single dictionary.

Assuming all class attributes of this name are dictionaries. If any of the dictionaries being accumulated have the same key, the one highest in the class hierarchy wins. (XXX: If "highest" means "closest to the starting class".)

Ex:

 class Soy:
   properties = {"taste": "bland"}

 class Plant:
   properties = {"colour": "green"}

 class Seaweed(Plant):
   pass

 class Lunch(Soy, Seaweed):
   properties = {"vegan": 1 }

 dct = {}

 accumulateClassDict(Lunch, "properties", dct)

 print(dct)

{"taste": "bland", "colour": "green", "vegan": 1}

def accumulateClassList(classObj, attr, listObj, baseClass=None):

Accumulate all attributes of a given name in a class hierarchy into a single list.

Assuming all class attributes of this name are lists.

def isSame(a, b):

Undocumented

def isLike(a, b):

Undocumented

def modgrep(goal):

Undocumented

def isOfType(start, goal):

Undocumented

def findInstances(start, t):

Undocumented

def objgrep(start, goal, eq=isLike, path='', paths=None, seen=None, showUnknowns=0, maxDepth=None):

An insanely CPU-intensive process for finding stuff.

API Documentation for twisted, generated by pydoctor at 2020-03-25 17:34:30.

twisted.python.reflect module documentation

`twisted.python.reflect` module documentation