def blitz(expr,local_dict=None, global_dict=None,check_size=1,verbose=0,**kw):
# this could call inline, but making a copy of the
# code here is more efficient for several reasons.
global function_catalog
# this grabs the local variables from the *previous* call
# frame -- that is the locals from the function that called
# inline.
call_frame = sys._getframe().f_back
if local_dict is None:
local_dict = call_frame.f_locals
if global_dict is None:
global_dict = call_frame.f_globals
# 1. Check the sizes of the arrays and make sure they are compatible.
# This is expensive, so unsetting the check_size flag can save a lot
# of time. It also can cause core-dumps if the sizes of the inputs
# aren't compatible.
if check_size and not size_check.check_expr(expr,local_dict,global_dict):
raise ValueError("inputs failed to pass size check.")
# 2. try local cache
try:
results = function_cache[expr](*(local_dict,global_dict))
return results
except:
pass
try:
results = attempt_function_call(expr,local_dict,global_dict)
# 3. build the function
except ValueError:
# This section is pretty much the only difference
# between blitz and inline
ast = parser.suite(expr)
ast_list = ast.tolist()
expr_code = ast_to_blitz_expr(ast_list)
arg_names = ast_tools.harvest_variables(ast_list)
module_dir = global_dict.get('__file__',None)
func = inline_tools.compile_function(expr_code,arg_names,local_dict,
global_dict,module_dir,
compiler='gcc',auto_downcast=1,
verbose=verbose,
type_converters=converters.blitz,
**kw)
function_catalog.add_function(expr,func,module_dir)
try:
results = attempt_function_call(expr,local_dict,global_dict)
except ValueError:
warnings.warn('compilation failed. Executing as python code',
BlitzWarning)
exec(expr, global_dict, local_dict)
def test_calculated_index2(self):
a = np.arange(10)
nx = 0
expr = 'a[1:5] + a[nx+1:5+nx]'
size_check.check_expr(expr, locals())
def test_calculated_index2(self):
a = np.arange(10)
nx = 0
expr = 'a[1:5] + a[nx+1:5+nx]'
size_check.check_expr(expr,locals())
def check_calculated_index(self):
a = arange(10)
nx = 0
expr = 'a[5] + a[nx+3]'
size_check.check_expr(expr,locals())
