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JobShopScheduling
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improve module

parser
Trolli Schmittlauch 2017-06-27 23:49:52 +02:00
parent 901472e8b5
commit c3953449ff
1 changed files with 3 additions and 1 deletions
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4
src/JobShopParser/__init__.py
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@ -1,6 +1,8 @@
from typing import List, Tuple, Sequence, Optional, Union
import arpeggio
__all__ = ["jobshop1_parser", "jobshop2_parser"]
grammar = """
# starting point for jobshop1 input file
job_shop1 = skip_preface
@ -78,7 +80,7 @@ class JobShopVisitor(arpeggio.PTNodeVisitor):
if len(job_numbers) % 2 ==1:
raise ParseError("Odd number of numbers in job data")
# returns list of (duration, machine) tuples
return list(zip(job_numbers[1::2], job_numbers[0::2]))
return list(zip(job_numbers[1::2], job_numbers[0::2])) # [::2] returns only every second element of the list
def visit_problem_data(self, node: arpeggio.ParseTreeNode, children: arpeggio.SemanticActionResults) -> JobShopProblem:
if self.debug: