#Debugging
if get_exec_pars().args is None:
    """
    PRE_ACTIONS = {"motor2":0.1}
    POSITIONERS = ["master", "motor"]
    START = [0.0,0.0]
    STOP = [1.0,1.0]
    STEPS = [3, 5]
    SENSORS = ["scienta.dataMatrix", "sin"]
    SETTLING_TIME = 0.1 
    PASSES = 1
    ZIGZAG = True
    COMPRESSION = True
    """
    NAME="Test"
    print "Debug"


import json
def load_parameters(name):
    filename = get_context().setup.expandPath("{home}/scans/" + name + ".json")        
    with open(filename) as config_file:  
        config = json.load(config_file)
        for key in config.keys():
             globals()[key] = config[key]
             print str(key), " = ", config[key]
if NAME:
    load_parameters(NAME)

    

#Enforece parameter types
positioners = string_to_obj(POSITIONERS)        
sensors = string_to_obj(SENSORS)
start = list(to_array(START, 'd'))
end = list(to_array(STOP, 'd'))
steps = list(to_array(STEPS, 'i'))
latency = SETTLING_TIME
passes = int(PASSES)
zigzag = bool(ZIGZAG)


#Execute pre-actions
for key in PRE_ACTIONS.keys():
    dev = string_to_obj(key)    
    if isinstance(dev, Writable):
        log("Setting " + dev.name + " to: " + str(PRE_ACTIONS[key]))
        dev.write(PRE_ACTIONS[key])

for key in PRE_ACTIONS.keys():
    dev = string_to_obj(key)
    if isinstance(dev, Device):
        log("Waiting  " + dev.name)    
        dev.waitReady(-1)


#Run scan    
if COMPRESSION:
    set_exec_pars(compression=[scienta.dataMatrix])


def before_read(pos, scan):    
    trigger_scienta()

    
def after_read(rec, scan):
    pass
    #handle_diagnostics(rec)

try:
    ret= ascan(positioners, sensors, start, end, steps, \
        latency = latency, relative = False, passes = passes, zigzag = zigzag, \
        before_read = before_read, after_read = after_read,
        snaps = diag_channels)  
finally:
    scienta.zeroSupplies()