| 1 | |
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| 2 | import sys |
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| 3 | import time |
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| 4 | from sans.data_util.calcthread import CalcThread |
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| 5 | |
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| 6 | def map_getattr(classInstance, classFunc, *args): |
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| 7 | """ |
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| 8 | Take an instance of a class and a function name as a string. |
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| 9 | Execute class.function and return result |
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| 10 | """ |
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| 11 | return getattr(classInstance,classFunc)(*args) |
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| 12 | |
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| 13 | def map_apply(arguments): |
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| 14 | return apply(arguments[0], arguments[1:]) |
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| 15 | |
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| 16 | class FitThread(CalcThread): |
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| 17 | """Thread performing the fit """ |
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| 18 | |
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| 19 | def __init__(self, |
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| 20 | fn, |
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| 21 | page_id, |
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| 22 | handler, |
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| 23 | batch_outputs, |
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| 24 | batch_inputs=None, |
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| 25 | pars=None, |
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| 26 | completefn = None, |
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| 27 | updatefn = None, |
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| 28 | yieldtime = 0.03, |
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| 29 | worktime = 0.03, |
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| 30 | ftol = None, |
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| 31 | reset_flag = False): |
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| 32 | CalcThread.__init__(self,completefn, |
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| 33 | updatefn, |
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| 34 | yieldtime, |
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| 35 | worktime) |
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| 36 | self.handler = handler |
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| 37 | self.fitter = fn |
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| 38 | self.pars = pars |
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| 39 | self.batch_inputs = batch_inputs |
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| 40 | self.batch_outputs = batch_outputs |
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| 41 | self.page_id = page_id |
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| 42 | self.starttime = time.time() |
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| 43 | self.updatefn = updatefn |
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| 44 | #Relative error desired in the sum of squares. |
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| 45 | self.ftol = ftol |
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| 46 | self.reset_flag = reset_flag |
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| 47 | |
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| 48 | def isquit(self): |
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| 49 | """ |
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| 50 | :raise KeyboardInterrupt: when the thread is interrupted |
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| 51 | |
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| 52 | """ |
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| 53 | try: |
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| 54 | CalcThread.isquit(self) |
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| 55 | except KeyboardInterrupt: |
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| 56 | msg = "Fitting: terminated by the user." |
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| 57 | raise KeyboardInterrupt, msg |
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| 58 | |
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| 59 | def compute(self): |
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| 60 | """ |
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| 61 | Perform a fit |
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| 62 | """ |
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| 63 | msg = "" |
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| 64 | try: |
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| 65 | import copy |
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| 66 | list_handler = [] |
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| 67 | list_curr_thread = [] |
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| 68 | list_ftol = [] |
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| 69 | list_reset_flag = [] |
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| 70 | list_map_get_attr = [] |
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| 71 | list_fit_function = [] |
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| 72 | list_q = [] |
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| 73 | for i in range(len(self.fitter)): |
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| 74 | list_handler.append(self.handler) |
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| 75 | list_q.append(None) |
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| 76 | list_curr_thread.append(self) |
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| 77 | list_ftol.append(self.ftol) |
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| 78 | list_reset_flag.append(self.reset_flag) |
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| 79 | list_fit_function.append('fit') |
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| 80 | list_map_get_attr.append(map_getattr) |
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| 81 | #from multiprocessing import Pool |
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| 82 | inputs = zip(list_map_get_attr,self.fitter, list_fit_function, |
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| 83 | list_q, list_q, list_handler,list_curr_thread,list_ftol, |
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| 84 | list_reset_flag) |
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| 85 | result = map(map_apply, inputs) |
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| 86 | |
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| 87 | self.complete(result=result, |
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| 88 | batch_inputs=self.batch_inputs, |
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| 89 | batch_outputs=self.batch_outputs, |
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| 90 | page_id=self.page_id, |
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| 91 | pars = self.pars, |
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| 92 | elapsed=time.time()-self.starttime) |
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| 93 | |
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| 94 | except KeyboardInterrupt, msg: |
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| 95 | # Thread was interrupted, just proceed and re-raise. |
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| 96 | # Real code should not print, but this is an example... |
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| 97 | #print "keyboard exception" |
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| 98 | #Stop on exception during fitting. Todo: need to put |
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| 99 | #some mssg and reset progress bar. |
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| 100 | |
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| 101 | if self.handler is not None: |
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| 102 | self.handler.stop(msg=msg) |
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| 103 | except: |
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| 104 | if self.handler is not None: |
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| 105 | self.handler.error(msg=str(sys.exc_value)) |
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| 106 | |
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| 107 | |
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| 108 | |
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