BIM: Fix Python 3.12 run time error with importers

Fixes #16137

Similar to this fix:
https://github.com/FreeCAD/FreeCAD/pull/13337#discussion_r1564806896

src/Mod/BIM/importers/exportIFC.py

@@ -32,6 +32,7 @@ import os
 import time
 import tempfile
 import math
+from builtins import open as pyopen
 
 import FreeCAD
 import Part
@@ -54,10 +55,6 @@ __title__  = "FreeCAD IFC export"
 __author__ = ("Yorik van Havre", "Jonathan Wiedemann", "Bernd Hahnebach")
 __url__    = "https://www.freecad.org"
 
-# Save the Python open function because it will be redefined
-if open.__module__ in ['__builtin__', 'io']:
-    pyopen = open
-
 # Templates and other definitions ****
 # Specific FreeCAD <-> IFC slang translations
 translationtable = {

src/Mod/BIM/importers/importIFC.py

@@ -55,10 +55,6 @@ __url__    = "https://www.freecad.org"
 DEBUG = False  # Set to True to see debug messages. Otherwise, totally silent
 ZOOMOUT = True  # Set to False to not zoom extents after import
 
-# Save the Python open function because it will be redefined
-if open.__module__ in ['__builtin__', 'io']:
-    pyopen = open
-
 # Templates and other definitions ****
 # which IFC type must create which FreeCAD type
 

src/Mod/BIM/importers/importIFClegacy.py

@@ -27,6 +27,7 @@
 
 
 import FreeCAD, Arch, Draft, os, sys, time, Part, DraftVecUtils, uuid, math, re
+from builtins import open as pyopen
 from draftutils import params
 from draftutils.translate import translate
 
@@ -54,9 +55,6 @@ supportedIfcTypes = ["IfcSite", "IfcBuilding", "IfcBuildingStorey", "IfcBeam", "
                      "IfcPile", "IfcFooting", "IfcReinforcingBar", "IfcTendon"]
 # TODO : shading device not supported?
 
-if open.__module__ in ['__builtin__','io']:
-    pyopen = open # because we'll redefine open below
-
 def open(filename,skip=None):
     "called when freecad opens a file"
     docname = os.path.splitext(os.path.basename(filename))[0]

src/Mod/BIM/importers/importJSON.py

@@ -22,6 +22,7 @@
 """FreeCAD JSON exporter"""
 
 import json
+from builtins import open as pyopen
 
 import FreeCAD
 import Draft
@@ -37,10 +38,6 @@ else:
     def translate(ctxt, txt): return txt
 
 
-if open.__module__ in ['__builtin__','io']:
-    pythonopen = open
-
-
 def export(exportList, filename):
     "exports the given objects to a .json file"
 
@@ -52,7 +49,7 @@ def export(exportList, filename):
         }
 
     # Write file
-    outfile = pythonopen(filename, "w")
+    outfile = pyopen(filename, "w")
     json.dump(data, outfile, separators = (',', ':'))
     outfile.close()
 

src/Mod/BIM/importers/importOBJ.py

@@ -22,7 +22,7 @@
 import os
 import codecs
 import ntpath
-# import numpy as np
+from builtins import open as pyopen
 
 import FreeCAD
 import Arch
@@ -50,9 +50,6 @@ else:
 #  and supports exporting faces with more than 3 vertices
 #  and supports object colors / materials
 
-if open.__module__ in ['__builtin__','io']:
-    pythonopen = open
-
 def findVert(aVertex,aList):
     "finds aVertex in aList, returns index"
     p = Draft.precision()
@@ -260,7 +257,7 @@ def export(exportList,filename,colors=None):
     outfile.close()
     FreeCAD.Console.PrintMessage(translate("Arch","Successfully written") + " " + filename + "\n")
     if materials:
-        outfile = pythonopen(filenamemtl,"w")
+        outfile = pyopen(filenamemtl,"w")
         outfile.write("# FreeCAD v" + ver[0] + "." + ver[1] + " build" + ver[2] + " Arch module\n")
         outfile.write("# https://www.freecad.org\n")
         kinds = {"AmbientColor":"Ka ","DiffuseColor":"Kd ","SpecularColor":"Ks ","EmissiveColor":"Ke ","Transparency":"Tr ","Dissolve":"d "}
@@ -306,7 +303,7 @@ def insert(filename,docname):
         doc = FreeCAD.newDocument(docname)
     FreeCAD.ActiveDocument = doc
 
-    with pythonopen(filename,"r",encoding="utf8") as infile:
+    with pyopen(filename,"r",encoding="utf8") as infile:
         verts = []
         facets = []
         activeobject = None
@@ -327,7 +324,7 @@ def insert(filename,docname):
         if line[:7] == "mtllib ":
             matlib = os.path.join(os.path.dirname(filename),line[7:])
             if os.path.exists(matlib):
-                with pythonopen(matlib,"r") as matfile:
+                with pyopen(matlib,"r") as matfile:
                     mname = None
                     color = None
                     trans = None

src/Mod/BIM/importers/importSH3D.py

@@ -28,6 +28,7 @@ import os
 import tempfile
 import xml.sax
 import zipfile
+from builtins import open as pyopen
 
 import FreeCAD
 import Arch
@@ -43,9 +44,6 @@ import Part
 
 DEBUG = True
 
-if open.__module__ in ['__builtin__','io']:
-    pyopen = open # because we'll redefine open below
-
 
 def open(filename):
     "called when freecad wants to open a file"

src/Mod/BIM/importers/importSHP.py

@@ -21,12 +21,11 @@
 #***************************************************************************
 
 import os
+from builtins import open as pyopen
+
 import FreeCAD
 translate = FreeCAD.Qt.translate
 
-if open.__module__ in ['__builtin__','io']:
-    pythonopen = open
-
 def open(filename):
 
     """opens a SHP/SHX/DBF file in a new FreeCAD document"""
@@ -142,7 +141,7 @@ def checkShapeFileLibrary():
                     return False
                 b = u.read()
                 fp = os.path.join(FreeCAD.getUserMacroDir(True),"shapefile.py")
-                f = pythonopen(fp,"wb")
+                f = pyopen(fp,"wb")
                 f.write(b)
                 f.close()
                 try:

src/Mod/BIM/importers/importWebGL.py

@@ -44,6 +44,7 @@ import Part
 import OfflineRenderingUtils
 import json
 import textwrap
+from builtins import open as pyopen
 
 if FreeCAD.GuiUp:
     import FreeCADGui
@@ -52,8 +53,6 @@ else:
     FreeCADGui = None
     def translate(ctxt, txt): return txt
 
-if open.__module__ in ['__builtin__','io']: pythonopen = open
-
 ## @package importWebGL
 #  \ingroup ARCH
 #  \brief FreeCAD WebGL Exporter
@@ -868,7 +867,7 @@ def export( exportList, filename, colors = None, camera = None ):
 
     html = html.replace('$data', json.dumps(data, separators=(',', ':')) ) # Shape Data
 
-    outfile = pythonopen(filename, "w")
+    outfile = pyopen(filename, "w")
     outfile.write( html )
     outfile.close()
     FreeCAD.Console.PrintMessage( translate("Arch", "Successfully written") + ' ' + filename + "\n" )