Created
January 5, 2018 00:02
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Advanced class utilities
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# -*- coding: utf-8 -*- | |
import importlib | |
import inspect | |
import pkgutil | |
import re | |
def is_match(entry, pattern): | |
"""Identify entry match. | |
Args: | |
entry: String entry to evaluate regex with. | |
pattern: Regular expression for matching. | |
Returns: | |
True or False. | |
""" | |
return re.search(pattern, entry) | |
def identify_matches(entries, pattern): | |
"""Identify entry matches. | |
Args: | |
entries: List of string entries to evaluate regex with. | |
pattern: Regular expression for matching. | |
Returns: | |
The list of items that satisfy regex pattern. | |
""" | |
matches = [] | |
for entry in entries: | |
if is_match(entry, pattern): | |
matches.append(entry) | |
return matches | |
def identify_classes(package, criteria): | |
"""Identify classes from given package. | |
Helpful links: | |
* https://stackoverflow.com/questions/1707709/list-all-the-modules-that-are-part-of-a-python-package | |
* https://stackoverflow.com/questions/22119850/get-all-class-names-in-a-python-package | |
Args: | |
package: Actual package from an import statement. | |
criteria: Function for injecting criteria that expects name as input. | |
Returns: | |
Set of Analyzer subclasses discovered in package. | |
""" | |
classes = set() | |
path = package.__path__ | |
prefix = package.__name__ + '.' | |
for importer, modname, ispkg in pkgutil.iter_modules(path, prefix): | |
if ispkg: | |
continue | |
mod = importlib.import_module(modname) | |
for name, kls in inspect.getmembers(mod, inspect.isclass): | |
if criteria(name) is True: | |
classes.add(kls) | |
return classes |
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# -*- coding: utf-8 -*- | |
# https://stackoverflow.com/questions/452969/does-python-have-an-equivalent-to-java-class-forname | |
def get_class(kls): | |
parts = kls.split('.') | |
module = ".".join(parts[:-1]) | |
m = __import__(module) | |
for comp in parts[1:]: | |
m = getattr(m, comp) | |
return m |
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