updated to only have one PJ_CONTEXT per pyproj session (#376)

* updated to only have one PJ_CONTEXT per pyproj session

* updated tests to unset datadir

docs/history.rst

@@ -12,7 +12,7 @@ Change Log
   (:meth:`~pyproj.geod.Geod.geometry_area_perimeter` & :meth:`~pyproj.geod.Geod.geometry_length`)
   (pull #366)
 * Removed deprecated functions `Proj.proj_version`, `CRS.is_valid`, and `CRS.to_geodetic()` (pull #371)
-
+* Updated to only have one PJ_CONTEXT per pyproj session (issue #374)
 
 2.2.2
 ~~~~~

pyproj/_crs.pxd

@@ -10,7 +10,7 @@ cdef class Axis:
     cdef readonly object unit_code
 
     @staticmethod
-    cdef create(PJ_CONTEXT* projcontext, PJ* projobj, int index)
+    cdef create(PJ* projobj, int index)
 
 cdef class AreaOfUse:
     cdef readonly double west
@@ -20,12 +20,11 @@ cdef class AreaOfUse:
     cdef readonly object name
 
     @staticmethod
-    cdef create(PJ_CONTEXT* projcontext, PJ* projobj)
+    cdef create(PJ* projobj)
 
 
 cdef class Base:
     cdef PJ *projobj
-    cdef PJ_CONTEXT *projctx
     cdef readonly object name
 
 
@@ -75,7 +74,7 @@ cdef class Param:
     cdef readonly object unit_category
 
     @staticmethod
-    cdef create(PJ_CONTEXT* projcontext, PJ* projobj, int param_idx)
+    cdef create(PJ* projobj, int param_idx)
 
 
 cdef class Grid:
@@ -88,7 +87,7 @@ cdef class Grid:
     cdef readonly object available
 
     @staticmethod
-    cdef create(PJ_CONTEXT* projcontext, PJ* projobj, int grid_idx)
+    cdef create(PJ* projobj, int grid_idx)
 
 
 cdef class CoordinateOperation(Base):
@@ -109,7 +108,6 @@ cdef class CoordinateOperation(Base):
 cdef class _CRS(Base):
     cdef PJ_TYPE _type
     cdef PJ_PROJ_INFO projpj_info
-    cdef char *pjinitstring
     cdef readonly object srs
     cdef readonly object type_name
     cdef object _ellipsoid
@@ -121,4 +119,4 @@ cdef class _CRS(Base):
     cdef object _target_crs
     cdef object _geodetic_crs
     cdef object _coordinate_system
-    cdef object _coordinate_operation
+    cdef object _coordinate_operation