fixed issue #401

:Problem: idf.run() does a saveas("in.idf") and does NOT go back to original name
:Solution: do saveas("ranmdomname.idf") and go back to original name

.gitignore

@@ -1,3 +1,4 @@
+*.swp
 tags
 *~
 *.pyc

eppy/modeleditor.py

@@ -1055,14 +1055,46 @@ def run(self, **kwargs):
 
         """
         # write the IDF to the current directory
-        self.saveas("in.idf")
+        import uuid
+        t_suffix = uuid.uuid4().hex
+        temp_name = f"{t_suffix}.idf"
+
+        idfname = self.idfname
+        idfabsname = self.idfabsname
+
+
+        self.saveas(temp_name)
+
+
         # if `idd` is not passed explicitly, use the IDF.iddname
         idd = kwargs.pop("idd", self.iddname)
         epw = kwargs.pop("weather", self.epw)
         try:
             run(self, weather=epw, idd=idd, **kwargs)
         finally:
-            os.remove("in.idf")
+            self.idfname = idfname
+            self.idfabsname = idfabsname
+            os.remove(temp_name)
+
+    def runfile(self, **kwargs):
+        """Run an IDF file on the disk with a given EnergyPlus weather file. This is a
+        wrapper for the EnergyPlus command line interface.
+        
+        This is different from run() which can run a file that is only in memory
+
+        Parameters
+        ----------
+        kwargs :
+            See eppy.runner.functions.run()
+
+        """
+        idd = kwargs.pop("idd", self.iddname)
+        epw = kwargs.pop("weather", self.epw)
+        try:
+            run(self, weather=epw, idd=idd, **kwargs)
+        finally:
+            # os.remove("in.idf")
+            pass
 
     def getiddgroupdict(self):
         """Return a idd group dictionary

eppy/runningnotes.txt

@@ -1,3 +1,47 @@
+
+
+
+2022-11-26
+----------
+
+Plan:
+
+- don't change existing functions - idf.run and runIDFs
+- make new functions that will run files from the disk
+- idf.run -> idf.runfile
+- runIDFs -> runIDFfiles
+
+Status:
+
+- OK .. both of the above are working
+- TODO
+    - duplicate the tests
+    - Update doc strings for new function
+    - include these functions in user documentation.
+- need to restore idf.idfname to the original name
+- see
+- https://stackoverflow.com/questions/8577137/how-can-i-create-a-tmp-file-in-python
+- for temporary file names.
+
+
+2022-11-25
+----------
+
+- removed saveas("in.idf") from idf.run()
+- runs works and runIDFs() works
+- tests are failing - fix them.
+
+notes:
+
+- idf.run() should work only on a file that is on disk
+- So a file has to be saved onto disk before it can be run
+- The tests in tests_runner do not have this expaection. So they fail
+- ######
+- the fact that they have to saved has to in the documentation.
+- both function doc and readthedocs 
+
+
+
 2022-11-24
 ----------
 

tests/test_runner.py

@@ -271,6 +271,17 @@ def test_run(self, test_idf):
         files = os.listdir("run_outputs")
         assert set(files) == set(self.expected_files)
 
+    def test_run_retain_idfname(self, test_idf):
+        """
+        idf.run() changes idfname. Confirm that the name is restored
+
+        """
+        idfname = test_idf.idfname
+        idfabsname = test_idf.idfabsname
+        test_idf.run(output_directory="run_outputs")
+        assert test_idf.idfname == idfname
+        assert test_idf.idfabsname == idfabsname
+
     def test_run_readvars(self, test_idf):
         """
         End to end test of idf.run function with readvars set True.