install and use unlzw3 by default

Author: valgur

setup.cfg

@@ -32,6 +32,7 @@ install_requires =
   numpy
   xarray>=0.11
   hatanaka
+  unlzw3
 package_dir=
   =src
 
@@ -64,5 +65,4 @@ plot =
   cartopy
 io =
   netcdf4
-  unlzw3
   psutil

src/georinex/rio.py

@@ -12,14 +12,10 @@
 from hatanaka import crx2rnx
 
 try:
-    from unlzw3 import unlzw
+    # The C-based unlzw lib is more efficient but also more difficult to install
+    from unlzw import unlzw
 except ImportError:
-    try:
-        from unlzw import unlzw
-    except ImportError:
-        unlzw = None
-
-from .hatanaka import opencrx
+    from unlzw3 import unlzw
 
 
 @contextmanager