Fixing more relative import statements

gerber/common.py

@@ -30,9 +30,9 @@ def read(filename):
         CncFile object representing the file, either GerberFile or
         ExcellonFile. Returns None if file is not an Excellon or Gerber file.
     """
-    import rs274x
-    import excellon
-    from utils import detect_file_format
+    from . import rs274x
+    from . import excellon
+    from .utils import detect_file_format
     fmt = detect_file_format(filename)
     if fmt == 'rs274x':
         return rs274x.read(filename)

gerber/render/__init__.py

@@ -24,5 +24,5 @@ SVG is the only supported format.
 """
 
 
-from svgwrite_backend import GerberSvgContext
-from cairo_backend import GerberCairoContext
+from .svgwrite_backend import GerberSvgContext
+from .cairo_backend import GerberCairoContext