Use warnings package to issue user warnings

climlab/__init__.py

@@ -7,7 +7,7 @@
 has been documented for a comprehensive understanding and traceability.
 '''
 
-__version__ = '0.7.1'
+__version__ = '0.7.2.dev0'
 
 # this should ensure that we can still import constants.py as climlab.constants
 from .utils import constants, thermo, legendre

climlab/convection/emanuel_convection.py

@@ -4,13 +4,14 @@
 from __future__ import absolute_import
 
 import numpy as np
+import warnings
 from climlab.process import TimeDependentProcess
 from climlab.utils.thermo import qsat
 from climlab import constants as const
 try:
     from ._emanuel_convection import emanuel_convection as convect
 except:
-    print('Cannot import EmanuelConvection fortran extension, this module will not be functional.')
+    warnings.warn('Cannot import EmanuelConvection fortran extension, this module will not be functional.')
 # The array conversion routines we are borrowing from the RRTMG wrapper
 from climlab.radiation.rrtm.utils import _climlab_to_rrtm as _climlab_to_convect
 from climlab.radiation.rrtm.utils import _rrtm_to_climlab as _convect_to_climlab

climlab/domain/xarray.py

@@ -2,6 +2,7 @@
 from builtins import str
 from builtins import object
 from xarray import Dataset, DataArray
+import warnings
 
 
 def Field_to_xarray(field):
@@ -55,7 +56,7 @@ def state_to_xarray(state):
                 except:
                     pass
         else:
-            print('{} excluded from Dataset because it is not a Field variable.'.format(name))
+            warnings.warn('{} excluded from Dataset because it is not a Field variable.'.format(name))
     return ds
 
 def to_xarray(input):

climlab/radiation/cam3/cam3.py

@@ -37,16 +37,8 @@
 from climlab import constants as const
 from climlab.utils.thermo import vmr_to_mmr
 from climlab.radiation.radiation import _Radiation_SW, _Radiation_LW
-import os
-#  Wrapping these imports in try/except to avoid failures during documentation building on readthedocs
-try:
-    from . import _cam3
-except:
-    print('Cannot import compiled Fortran extension, CAM3 module will not be functional.')
-try:
-    import xarray as xr
-except:
-    print('Cannot import xarray. Will not be able to properly initialize the CAM3 module.')
+import os, warnings
+import xarray as xr
 
 
 def init_cam3(mod):
@@ -61,10 +53,13 @@ def init_cam3(mod):
         setattr(mod, field, data[field].transpose())
     data.close()
 
+#  Wrapping these imports in try/except to avoid failures during documentation building on readthedocs
 try:
+    from . import _cam3
     init_cam3(_cam3.absems)
 except:
-    print('Cannot initialize the CAM3 module.')
+    warnings.warn('Cannot import and initialize compiled Fortran extension, CAM3 module will not be functional.')
+
 
 class CAM3(_Radiation_SW, _Radiation_LW):
     '''

climlab/radiation/radiation.py

@@ -79,11 +79,12 @@
 import os
 from climlab import constants as const
 from climlab.domain.field import Field
+import warnings
 try:
     import xarray as xr
 except:
-    print('Cannot import xarray. Will not be able to initialize ozone from data file.')
-
+    warnings.warn('Cannot import `xarray`. Will not be able to initialize ozone from data file.',
+                FutureWarning, stacklevel=2)
 
 def default_specific_humidity(Tatm):
     '''Initialize a specific humidity distribution

climlab/radiation/rrtm/rrtmg_lw.py

@@ -1,7 +1,6 @@
-from __future__ import division
-from __future__ import print_function
-from __future__ import absolute_import
+from __future__ import division, print_function, absolute_import
 import numpy as np
+import warnings
 from climlab import constants as const
 from climlab.radiation.radiation import _Radiation_LW
 from .utils import _prepare_general_arguments
@@ -16,7 +15,7 @@
     #  Initialize absorption data
     _rrtmg_lw.climlab_rrtmg_lw_ini(const.cp)
 except:
-    print('Cannot import and initialize compiled Fortran extension, RRTMG_LW module will not be functional.')
+    warnings.warn('Cannot import and initialize compiled Fortran extension, RRTMG_LW module will not be functional.')
 
 
 class RRTMG_LW(_Radiation_LW):

climlab/radiation/rrtm/rrtmg_sw.py

@@ -1,5 +1,6 @@
 from __future__ import division, print_function, absolute_import
 import numpy as np
+import warnings
 from climlab import constants as const
 from climlab.radiation.radiation import _Radiation_SW
 from .utils import _prepare_general_arguments
@@ -15,7 +16,7 @@
     #  Initialize absorption data
     _rrtmg_sw.climlab_rrtmg_sw_ini(const.cp)
 except:
-    print('Cannot import and initialize compiled Fortran extension, RRTMG_SW module will not be functional.')
+    warnings.warn('Cannot import and initialize compiled Fortran extension, RRTMG_SW module will not be functional.')
 
 
 class RRTMG_SW(_Radiation_SW):

conda-recipe/meta.yaml

@@ -1,5 +1,5 @@
 {% set name = "climlab" %}
-{% set version = "0.7.1" %}
+{% set version = "0.7.2.dev0" %}
 
 package:
   name: {{ name|lower }}
@@ -10,7 +10,7 @@ source:
 
 build:
   skip: True  # [win32 or (win and py27)]
-  number: 3
+  number: 0
 
 requirements:
   build:

setup.py

@@ -1,7 +1,7 @@
 import os, sys
 import textwrap
 
-VERSION = '0.7.1'
+VERSION = '0.7.2.dev0'
 
 # BEFORE importing setuptools, remove MANIFEST. Otherwise it may not be
 # properly updated when the contents of directories change (true for distutils,