add library parse function for jobshop2

- clean up 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()