add library parse function for jobshop2

- clean up problem_data

src/JobShopParser/common.py

@@ -46,8 +46,8 @@ class JobShopProblem:
         self.machines = machines
         self.jobs = jobs
 
-    def __str__() -> str:
-        return name
+    def __str__(self) -> str:
+        return self.name
 
 class JobShopVisitor(arpeggio.PTNodeVisitor):
     """contains visitor functions needed for both jobshop1 (list of instances)
@@ -83,7 +83,8 @@ class JobShopVisitor(arpeggio.PTNodeVisitor):
     def visit_problem_data(self, node: arpeggio.ParseTreeNode, children: arpeggio.SemanticActionResults) -> JobShopProblem:
         if self.debug:
             print("problem_data\nchildren:", children)
-        problem_data: List[List[Tuple(int, int)]] = [ children[i] for i in range(2, len(children))]
+        cleaned_data = list(filter(lambda x: type(x) is not str, children))
+        problem_data: List[List[Tuple(int, int)]] = [ cleaned_data[i] for i in range(2, len(cleaned_data))]
         return JobShopProblem(children[0], children[1], problem_data)
 
 

src/JobShopParser/jobshop2_parser.py

@@ -1,11 +1,25 @@
+import arpeggio
 from arpeggio.cleanpeg import ParserPEG
+from typing import List, Tuple, Sequence, Optional, Union
 
-from common import grammar
+from common import grammar, JobShopVisitor, JobShopProblem
 
-parser = ParserPEG(grammar, "problem_data", skipws=False,debug=True)
+class JobShop2Visitor(JobShopVisitor):
+    pass
 
-with open('./inputdata/jobshop2/ta13') as jobdatafile:
-    jobdata : str = jobdatafile.read()
-    print("zu parsender String:\n\v\v", jobdata)
-    parse_tree = parser.parse(jobdata)
-    print(parse_tree)
+def parse_jobshop2_file(filename: Union[str, bytes]) -> JobShopProblem:
+    """Open file with jobshop2-formatted data (single problem instance, no name & description),
+    parse it and return JobShopProblem"""
+
+    with open(filename) as datafile:
+        inputdata: str = datafile.read()
+        parse_tree = parser.parse(inputdata)
+        return arpeggio.visit_parse_tree(parse_tree, JobShop2Visitor(debug=True))
+
+def main():
+    print(parse_jobshop2_file('./inputdata/jobshop2/ta13').problem_data)
+ 
+parser = ParserPEG(grammar, "problem_data", skipws=False)
+
+if __name__ == "__main__":
+    main()