Cleanup

pointCollection/ATL06/data.py

@@ -33,6 +33,7 @@ def __init__(self, fields=None, SRS_proj4=None, field_dict=None, beam_pair=2, co
             self.fields=list(fields)
         self.fields=fields
         self.SRS_proj4=SRS_proj4
+        self.coordinates=['longitude','latitude']
         self.columns=columns
         self.shape=(0,2)
         self.size=0

pointCollection/CS2/data.py

@@ -35,7 +35,6 @@
 
 import numpy as np
 import pointCollection as pc
-import netCDF4
 import re
 import os
 
@@ -918,6 +917,7 @@ def cryosat_baseline_D(self, full_filename, unpack=False):
         """
         Read L2 MDS variables for CryoSat Baseline D (netCDF4)
         """
+        import netCDF4
         # open netCDF4 file for reading
         fid = netCDF4.Dataset(os.path.expanduser(full_filename),'r')
         # use original unscaled units unless unpack=True

pointCollection/CS2_wfm/data.py

@@ -32,7 +32,6 @@
 
 import numpy as np
 import pointCollection as pc
-import netCDF4
 import re
 import os
 
@@ -1461,6 +1460,7 @@ def cryosat_baseline_D(self, full_filename, unpack=False):
         """
         Read L1b MDS variables for CryoSat Baseline D (netCDF4)
         """
+        import netCDF4
         # open netCDF4 file for reading
         fid = netCDF4.Dataset(os.path.expanduser(full_filename),'r')
         # use original unscaled units unless unpack=True

pointCollection/__init__.py

@@ -10,21 +10,21 @@
 from .tile import tile
 from .tilingSchema import tilingSchema
 from .geoIndex import geoIndex
-# data classes
-from pointCollection import ATM_Qfit
-from pointCollection import ATM_ICESSN
-from pointCollection import CS2_wfm
-from pointCollection import CS2
-from pointCollection import CS2_retracked_POCA
-from pointCollection import CS2_retracked_SW
-from pointCollection import ATL06
-from pointCollection import indexedH5
-from pointCollection import ATM_WF
-from pointCollection import glah12
-from pointCollection import glah06
-from pointCollection import ATL11
-from pointCollection import ATL11_prerelease
 from pointCollection import grid
+# data classes — loaded lazily on first access (e.g. pc.ATL06, pc.ATM_Qfit)
+_SUBPACKAGES = frozenset({
+    'ATM_Qfit', 'ATM_ICESSN', 'CS2_wfm', 'CS2', 'CS2_retracked_POCA',
+    'CS2_retracked_SW', 'ATL06', 'indexedH5', 'ATM_WF', 'glah12',
+    'glah06', 'ATL11', 'grid',
+})
+
+def __getattr__(name):
+    if name in _SUBPACKAGES:
+        import importlib
+        mod = importlib.import_module(f'pointCollection.{name}')
+        globals()[name] = mod
+        return mod
+    raise AttributeError(f"module 'pointCollection' has no attribute {name!r}")
 
 # utilities
 from .tools.bin_rows import bin_rows
@@ -44,4 +44,3 @@
 from .xover_search import cross_tracks
 from pointCollection.ps_scale_for_lat import ps_scale_for_lat
 from pointCollection.reconstruct_ATL06_tracks import reconstruct_ATL06_tracks
-#from pointCollection.dataPicker import dataPicker