TypeError: in method 'SpatialReference_ImportFromEPSG', argument 2 of type 'int'

[nevilamos]

I note this issue has already been raise at : #22 however in that case it was for a ,png with no projection data/EPSG number embedded.
I am encountering the same error trying to run on a geotiff which gdal info shows has spatial referencing:

my command is:
gdal2mbtiles -v masked.tif masked.mbtiles --min-resolution=7 --max-resolution=8

Traceback (most recent call last):
File "/home/nev/.local/bin/gdal2mbtiles", line 11, in
load_entry_point('gdal2mbtiles==2.1.2', 'console_scripts', 'gdal2mbtiles')()
File "/home/nev/.local/lib/python2.7/site-packages/gdal2mbtiles/main.py", line 309, in main
colors=colors, band=band)
File "/home/nev/.local/lib/python2.7/site-packages/gdal2mbtiles/helpers.py", line 194, in warp_mbtiles
validate_resolutions(resolution=dataset.GetNativeResolution(),
File "/home/nev/.local/lib/python2.7/site-packages/gdal2mbtiles/gdal.py", line 497, in GetNativeResolution
dst_ref = self.GetSpatialReference()
File "/home/nev/.local/lib/python2.7/site-packages/gdal2mbtiles/gdal.py", line 463, in GetSpatialReference
sr = sr.FromEPSG(sr.GetEPSGCode())
File "/home/nev/.local/lib/python2.7/site-packages/gdal2mbtiles/gdal.py", line 799, in FromEPSG
s.ImportFromEPSG(code)
File "/usr/lib/python2.7/dist-packages/osgeo/osr.py", line 797, in ImportFromEPSG
return _osr.SpatialReference_ImportFromEPSG(self, *args)
TypeError: in method 'SpatialReference_ImportFromEPSG', argument 2 of type 'int'

the gdalinfo on the file returns:
Driver: GTiff/GeoTIFF
Files: masked.tif
Size is 3620, 2530
Coordinate System is:
PROJCS["unnamed",
GEOGCS["unnamed ellipse",
DATUM["unknown",
SPHEROID["unnamed",6378137,0]],
PRIMEM["Greenwich",0],
UNIT["degree",0.0174532925199433]],
PROJECTION["Mercator_2SP"],
PARAMETER["standard_parallel_1",0],
PARAMETER["central_meridian",0],
PARAMETER["false_easting",0],
PARAMETER["false_northing",0],
UNIT["metre",1,
AUTHORITY["EPSG","9001"]]]
Origin = (15660855.904725419357419,-4021344.132019802927971)
Pixel Size = (289.432029319978540,-286.592914214417760)
Metadata:
AREA_OR_POINT=Area
Image Structure Metadata:
INTERLEAVE=PIXEL
Corner Coordinates:
Upper Left (15660855.905,-4021344.132) (140d41' 1.90"E, 33d56'39.98"S)
Lower Left (15660855.905,-4746424.205) (140d41' 1.90"E, 39d10'21.33"S)
Upper Right (16708599.851,-4021344.132) (150d 5'45.26"E, 33d56'39.98"S)
Lower Right (16708599.851,-4746424.205) (150d 5'45.26"E, 39d10'21.33"S)
Center (16184727.878,-4383884.169) (145d23'23.58"E, 36d36'10.04"S)
Band 1 Block=3620x1 Type=Byte, ColorInterp=Red
Band 2 Block=3620x1 Type=Byte, ColorInterp=Green
Band 3 Block=3620x1 Type=Byte, ColorInterp=Blue

[elfmanryan]

Hi sorry your having trouble, ad sorry for the delayed reply, issues on this repo have slipped past us.
I dont think your geotiff does have a geometry. I notice:
PROJCS["unnamed", GEOGCS["unnamed ellipse", DATUM["unknown",