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Flow Based Programming Experiments
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import inspect | |
import functools | |
def multiply(x, y): | |
return x * y | |
def add(x, y): | |
return x + y | |
def x(): | |
return 1 | |
def resolve_methods(connections, methods, resolved_methods): | |
""" | |
First iteration will give methods without any arguments and | |
methods that uses these argumentless methods. | |
Second iteration will yield A, because B and C are resolved. | |
Need to pass in resolved methods for other methods to use. | |
""" | |
result_length = len(resolved_methods.keys()) | |
mapped_methods = {} | |
for method in methods: | |
data = {"method": method, "arguments": {}} | |
for arg in inspect.getargspec(method).args: | |
data["arguments"][arg] = None | |
mapped_methods[method.__name__] = data | |
for connection in connections: | |
out_connection = connection[0] | |
in_connection, argument = connection[1].split(".") | |
data = mapped_methods[out_connection] | |
# Methods without any arguments can be passed straight as resolved | |
if not data["arguments"].keys(): | |
resolved_methods[data["method"].__name__] = data["method"] | |
# Fill in arguments from resolved_methods | |
if out_connection in resolved_methods.keys(): | |
arguments = mapped_methods[in_connection]["arguments"] | |
arguments[argument] = resolved_methods[out_connection] | |
# Add fully resolved methods to results | |
for name, data in mapped_methods.iteritems(): | |
resolved = True | |
for key, value in data["arguments"].iteritems(): | |
if value is None: | |
resolved = False | |
if resolved and name not in resolved_methods: | |
arguments = [] | |
for arg in inspect.getargspec(data["method"]).args: | |
for key, value in data["arguments"].iteritems(): | |
if key == arg: | |
arguments.append(value()) | |
resolved_methods[name] = functools.partial( | |
data["method"], *arguments | |
) | |
if result_length == len(resolved_methods.keys()): | |
return resolved_methods | |
else: | |
return resolve_methods(connections, methods, resolved_methods) | |
registered_methods = [add, multiply, x] | |
# Need unique ids for components in graph. Ei. instead of "add", its needs to be "unique-id". | |
# UUIDs might be a good option. | |
# Or we could describe the connections with classes. | |
class component(object): | |
def __init__(self, method): | |
self.method = method | |
for arg in inspect.getargspec(method).args: | |
self.__dict__[arg] = None | |
x1 = component(x) | |
add1 = component(add) | |
add2 = component(add) | |
connections = [ | |
(x1, add1.x), | |
(x1, add1.y), | |
(x1, add2.x), | |
(add1, add2.y) | |
] | |
""" | |
connections = [ | |
("x", "add.x"), ("x", "add.y"), | |
] | |
resolved_methods = {} | |
resolved_methods = resolve_methods( | |
connections, registered_methods, resolved_methods | |
) | |
print resolved_methods["add"]() | |
""" |
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