Modify pyqtgraph exporters for use with pyinstaller so that exporting works.

exporters__init__.py

Exporters = []
from pyqtgraph import importModules
#from .. import frozenSupport
import os
d = os.path.split(__file__)[0]
#files = []
#for f in frozenSupport.listdir(d):
    #if frozenSupport.isdir(os.path.join(d, f)) and f != '__pycache__':
        #files.append(f)
    #elif f[-3:] == '.py' and f not in ['__init__.py', 'Exporter.py']:
        #files.append(f[:-3])
    
#for modName in files:
    #mod = __import__(modName, globals(), locals(), fromlist=['*'])
#for mod in importModules('', globals(), locals(), excludes=['Exporter']).values():
#    if hasattr(mod, '__all__'):
#        names = mod.__all__
#    else:
#        names = [n for n in dir(mod) if n[0] != '_']
#    for k in names:
#        if hasattr(mod, k):
#            Exporters.append(getattr(mod, k))

from . import CSVExporter
from . import SVGExporter
from . import Matplotlib
from . import PrintExporter
from . import ImageExporter

mods = [CSVExporter, SVGExporter, Matplotlib, PrintExporter, ImageExporter]
for mod in mods:
    if hasattr(mod, '__all__'):
        names = mod.__all__
    else:
        names = [n for n in dir(mod) if n[0] != '_']
    for k in names:
        if hasattr(mod, k):
            Exporters.append(getattr(mod, k))

def listExporters():
    return Exporters[:]

exporters_init_diff.py

15c15,34
< for mod in importModules('', globals(), locals(), excludes=['Exporter']).values():
---
> #for mod in importModules('', globals(), locals(), excludes=['Exporter']).values():
> #    if hasattr(mod, '__all__'):
> #        names = mod.__all__
> #    else:
> #        names = [n for n in dir(mod) if n[0] != '_']
> #    for k in names:
> #        if hasattr(mod, k):
> #            Exporters.append(getattr(mod, k))
> 
> from . import CSVExporter
> from . import SVGExporter
> from . import Matplotlib
> from . import PrintExporter
> from . import ImageExporter
> 
> mods = [CSVExporter, SVGExporter, Matplotlib, PrintExporter, ImageExporter]
> for mod in mods: