def test_tree_parsing(self):
# to avoid static method warnings in tests,
# that by construction of the unittest package have to be expressed in such way
self.dummy_variable = "dummy_value"
tree = pt_util.parse("->(X('a', 'b', tau), +('c', 'd'))")
# test log generation
log = pt_semantics.generate_log(tree)
def parse_process_tree(tree_string: str) -> ProcessTree:
"""
Parse a process tree from a string
Parameters
----------------
tree_string
String representing a process tree (e.g. '-> ( 'A', O ( 'B', 'C' ), 'D' )')
Operators are '->': sequence, '+': parallel, 'X': xor choice, '*': binary loop, 'O' or choice
Returns
----------------
tree
Process tree
"""
from pm4py.objects.process_tree.utils.generic import parse
return parse(tree_string)
def apply(net, im, fm, parameters=None):
"""
Transforms a WF-net to a process tree
Parameters
-------------
net
Petri net
im
Initial marking
fm
Final marking
Returns
-------------
tree
Process tree
"""
if parameters is None:
parameters = {}
debug = exec_utils.get_param_value(Parameters.DEBUG, parameters, False)
fold = exec_utils.get_param_value(Parameters.FOLD, parameters, True)
grouped_net = group_blocks_in_net(net, parameters=parameters)
if len(grouped_net.transitions) == 1:
pt_str = list(grouped_net.transitions)[0].label
pt = pt_util.parse(pt_str)
ret = pt_util.fold(pt) if fold else pt
tree_sort(ret)
return ret
else:
if debug:
from pm4py.visualization.petri_net import visualizer as pn_viz
pn_viz.view(pn_viz.apply(grouped_net, parameters={"format":
"svg"}))
raise ValueError('Parsing of WF-net Failed')