Use flake8 for coding standards checking

Remove the pep8 test as it is no longer needed.

.travis.yml

@@ -2,7 +2,7 @@ language: python
 
 env:
     global:
-        - PACKAGES_STANDARD="setuptools pytest pep8 numpy pyspharm"
+        - PACKAGES_STANDARD="setuptools pytest numpy pyspharm"
     matrix:
         - NAME="Python 2.7 (standard)"
           PYTHON_VERSION=2.7

examples/cdms/rws_example.py

@@ -12,13 +12,13 @@
 import cartopy.crs as ccrs
 import cdms2
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
-import numpy as np
 
 from windspharm.cdms import VectorWind
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the cdms2 module
 # from CDAT. The components are in separate files.

examples/cdms/sfvp_example.py

@@ -14,13 +14,13 @@
 import cartopy.crs as ccrs
 import cdms2
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
-import numpy as np
 
 from windspharm.cdms import VectorWind
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the cdms2 module
 # from CDAT. The components are in separate files.

examples/iris/rws_example.py

@@ -16,13 +16,13 @@
 import iris.plot as iplt
 from iris.coord_categorisation import add_month
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
-import numpy as np
 
 from windspharm.iris import VectorWind
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the iris module.
 # The components are in separate files. We catch warnings here because the

examples/iris/sfvp_example.py

@@ -18,13 +18,13 @@
 import iris.plot as iplt
 from iris.coord_categorisation import add_month
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
-import numpy as np
 
 from windspharm.iris import VectorWind
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the iris module.
 # The components are in separate files. We catch warnings here because the

examples/standard/rws_example.py

@@ -13,15 +13,15 @@
 from cartopy.mpl.ticker import LongitudeFormatter, LatitudeFormatter
 from cartopy.util import add_cyclic_point
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
 from netCDF4 import Dataset
-import numpy as np
 
 from windspharm.standard import VectorWind
 from windspharm.tools import prep_data, recover_data, order_latdim
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the cdms2 module
 # from CDAT. The components are defined on pressure levels and are in separate

examples/standard/sfvp_example.py

@@ -15,15 +15,15 @@
 from cartopy.mpl.ticker import LongitudeFormatter, LatitudeFormatter
 from cartopy.util import add_cyclic_point
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
 from netCDF4 import Dataset
-import numpy as np
 
 from windspharm.standard import VectorWind
 from windspharm.tools import prep_data, recover_data, order_latdim
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the netCDF4
 # module. The components are defined on pressure levels and are in separate

examples/xarray/rws_example.py

@@ -11,14 +11,14 @@
 """
 import cartopy.crs as ccrs
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
-import numpy as np
 import xarray as xr
 
 from windspharm.xarray import VectorWind
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the xarray module.
 # The components are in separate files.

examples/xarray/sfvp_example.py

@@ -13,14 +13,14 @@
 """
 import cartopy.crs as ccrs
 import matplotlib as mpl
-mpl.rcParams['mathtext.default'] = 'regular'
 import matplotlib.pyplot as plt
-import numpy as np
 import xarray as xr
 
 from windspharm.xarray import VectorWind
 from windspharm.examples import example_data_path
 
+mpl.rcParams['mathtext.default'] = 'regular'
+
 
 # Read zonal and meridional wind components from file using the xarray module.
 # The components are in separate files.

lib/windspharm/cdms.py

@@ -20,7 +20,6 @@
 # THE SOFTWARE.
 from __future__ import absolute_import
 
-import numpy as np
 import cdms2
 
 from . import standard
@@ -771,7 +770,6 @@ def truncate(self, field, truncation=None):
         field = field(latitude=(90, -90))
         # Record the shape and axes in the API order.
         ishape = field.shape
-        axes = field.getAxisList()
         # Extract the data from the field in the correct shape for the API.
         fielddata = to3d(field.asma())
         # Apply the truncation.

lib/windspharm/iris.py

@@ -20,10 +20,8 @@
 # THE SOFTWARE.
 from __future__ import absolute_import
 
-import numpy as np
 from iris.cube import Cube
 from iris.util import reverse
-from spharm import gaussian_lats_wts
 
 from . import standard
 from ._common import get_apiorder, inspect_gridtype, to3d
@@ -744,7 +742,6 @@ def truncate(self, field, truncation=None):
         field = field.copy()
         field.transpose(apiorder)
         ishape = field.shape
-        coords = field.dim_coords
         fielddata = to3d(field.data)
         fieldtrunc = self._api.truncate(fielddata, truncation=truncation)
         field.data = fieldtrunc.reshape(ishape)

lib/windspharm/tests/reference.py

@@ -22,15 +22,6 @@
 import os
 
 import numpy as np
-try:
-    import cdms2
-except ImportError:
-    pass
-try:
-    from iris.cube import Cube
-    from iris.coords import DimCoord
-except ImportError:
-    pass
 from spharm import gaussian_lats_wts