本文实例讲述了Python实现的科学计算器功能。分享给大家供大家参考，具体如下：

import wximport reimport math# begin wxGlade: extracode# end wxGladeans=0ts=""class MyFrame(wx.Frame): def __init__(self, *args, **kwds): # begin wxGlade: MyFrame.__init__ kwds["style"] = wx.DEFAULT_FRAME_STYLE wx.Frame.__init__(self, *args, **kwds) self.text_ctrl_1 = wx.TextCtrl(self, -1, "" ,style=wx.TE_READONLY) self.text_ctrl_2 = wx.TextCtrl(self, -1, "", style=wx.TE_READONLY) self.button_37 = wx.Button(self, -1, "7") self.button_38 = wx.Button(self, -1, "8") self.button_39 = wx.Button(self, -1, "9") self.button_40 = wx.Button(self, -1, "+") self.button_41 = wx.Button(self, -1, "-") self.button_42 = wx.Button(self, -1, "4") self.button_43 = wx.Button(self, -1, "5") self.button_44 = wx.Button(self, -1, "6") self.button_45 = wx.Button(self, -1, "x") self.button_46 = wx.Button(self, -1, "/") self.button_47 = wx.Button(self, -1, "1") self.button_48 = wx.Button(self, -1, "2") self.button_49 = wx.Button(self, -1, "3") self.button_50 = wx.Button(self, -1, "(") self.button_51 = wx.Button(self, -1, ")") self.button_52 = wx.Button(self, -1, "0") self.button_53 = wx.Button(self, -1, ".") self.button_54 = wx.Button(self, -1, "ans") self.button_55 = wx.Button(self, -1, "clear") self.button_56 = wx.Button(self, -1, "=") self.button_57 = wx.Button(self, -1, "pi") self.button_58 = wx.Button(self, -1, "e") self.button_59 = wx.Button(self, -1, "1/x") self.button_60 = wx.Button(self, -1, "x^2") self.button_61 = wx.Button(self, -1, "x^y") self.button_62 = wx.Button(self, -1, "sqrt") self.button_63 = wx.Button(self, -1, "sin") self.button_64 = wx.Button(self, -1, "cos") self.button_65 = wx.Button(self, -1, "tan") self.button_66 = wx.Button(self, -1, "log") self.button_67 = wx.Button(self, -1, "ln") self.button_68 = wx.Button(self, -1, "n!") self.button_69 = wx.Button(self, -1, "mod") self.button_70 = wx.Button(self, -1, "int") self.button_71 = wx.Button(self, -1, "yu") self.button_72 = wx.Button(self, -1, "|") self.button_73 = wx.Button(self, -1, "~") self.button_74 = wx.Button(self, -1, "xor") self.__set_properties() self.__do_layout() self.Bind(wx.EVT_BUTTON, self.bu37, self.button_37) self.Bind(wx.EVT_BUTTON, self.bu38, self.button_38) self.Bind(wx.EVT_BUTTON, self.bu39, self.button_39) self.Bind(wx.EVT_BUTTON, self.bu40, self.button_40) self.Bind(wx.EVT_BUTTON, self.bu41, self.button_41) self.Bind(wx.EVT_BUTTON, self.bu42, self.button_42) self.Bind(wx.EVT_BUTTON, self.bu43, self.button_43) self.Bind(wx.EVT_BUTTON, self.bu44, self.button_44) self.Bind(wx.EVT_BUTTON, self.bu45, self.button_45) self.Bind(wx.EVT_BUTTON, self.bu46, self.button_46) self.Bind(wx.EVT_BUTTON, self.bu47, self.button_47) self.Bind(wx.EVT_BUTTON, self.bu48, self.button_48) self.Bind(wx.EVT_BUTTON, self.bu49, self.button_49) self.Bind(wx.EVT_BUTTON, self.bu50, self.button_50) self.Bind(wx.EVT_BUTTON, self.bu51, self.button_51) self.Bind(wx.EVT_BUTTON, self.bu52, self.button_52) self.Bind(wx.EVT_BUTTON, self.bu53, self.button_53) self.Bind(wx.EVT_BUTTON, self.bu54, self.button_54) self.Bind(wx.EVT_BUTTON, self.bu55, self.button_55) self.Bind(wx.EVT_BUTTON, self.bu56, self.button_56) self.Bind(wx.EVT_BUTTON, self.bu57, self.button_57) self.Bind(wx.EVT_BUTTON, self.bu58, self.button_58) self.Bind(wx.EVT_BUTTON, self.bu59, self.button_59) self.Bind(wx.EVT_BUTTON, self.bu60, self.button_60) self.Bind(wx.EVT_BUTTON, self.bu61, self.button_61) self.Bind(wx.EVT_BUTTON, self.bu62, self.button_62) self.Bind(wx.EVT_BUTTON, self.bu63, self.button_63) self.Bind(wx.EVT_BUTTON, self.bu64, self.button_64) self.Bind(wx.EVT_BUTTON, self.bu65, self.button_65) self.Bind(wx.EVT_BUTTON, self.bu66, self.button_66) self.Bind(wx.EVT_BUTTON, self.bu67, self.button_67) self.Bind(wx.EVT_BUTTON, self.bu68, self.button_68) self.Bind(wx.EVT_BUTTON, self.bu69, self.button_69) self.Bind(wx.EVT_BUTTON, self.bu70, self.button_70) self.Bind(wx.EVT_BUTTON, self.bu71, self.button_71) self.Bind(wx.EVT_BUTTON, self.bu72, self.button_72) self.Bind(wx.EVT_BUTTON, self.bu73, self.button_73) self.Bind(wx.EVT_BUTTON, self.bu74, self.button_74) # end wxGlade self.Show(True) def __set_properties(self): # begin wxGlade: MyFrame.__set_properties self.SetTitle("Python Calculater by CYG") self.text_ctrl_1.SetMinSize((500, 30)) self.text_ctrl_2.SetMinSize((500, 50)) self.button_37.SetMinSize((100, 60)) self.button_38.SetMinSize((100, 60)) self.button_39.SetMinSize((100, 60)) self.button_40.SetMinSize((100, 60)) self.button_41.SetMinSize((100, 60)) self.button_42.SetMinSize((100, 60)) self.button_43.SetMinSize((100, 60)) self.button_44.SetMinSize((100, 60)) self.button_46.SetMinSize((100, 60)) self.button_45.SetMinSize((100, 60)) self.button_47.SetMinSize((100, 60)) self.button_48.SetMinSize((100, 60)) self.button_49.SetMinSize((100, 60)) self.button_50.SetMinSize((100, 60)) self.button_51.SetMinSize((100, 60)) self.button_52.SetMinSize((100, 60)) self.button_53.SetMinSize((100, 60)) self.button_54.SetMinSize((100, 60)) self.button_55.SetMinSize((100, 60)) self.button_56.SetMinSize((100, 60)) self.button_57.SetMinSize((83, 50)) self.button_58.SetMinSize((83, 50)) self.button_59.SetMinSize((83, 50)) self.button_60.SetMinSize((83, 50)) self.button_61.SetMinSize((83, 50)) self.button_62.SetMinSize((83, 50)) self.button_63.SetMinSize((83, 50)) self.button_64.SetMinSize((83, 50)) self.button_65.SetMinSize((83, 50)) self.button_66.SetMinSize((83, 50)) self.button_67.SetMinSize((83, 50)) self.button_68.SetMinSize((83, 50)) self.button_69.SetMinSize((83, 50)) self.button_70.SetMinSize((83, 50)) self.button_71.SetMinSize((83, 50)) self.button_72.SetMinSize((83, 50)) self.button_73.SetMinSize((83, 50)) self.button_74.SetMinSize((83, 50)) # end wxGlade def __do_layout(self): # begin wxGlade: MyFrame.__do_layout sizer_2 = wx.BoxSizer(wx.VERTICAL) sizer_3 = wx.BoxSizer(wx.VERTICAL) grid_sizer_1 = wx.GridSizer(4, 5, 0, 0) grid_sizer_2 = wx.GridSizer(3, 6, 0, 0) sizer_3.Add(self.text_ctrl_2, 0, 0, 0) sizer_3.Add(self.text_ctrl_1, 0, 0, 0) grid_sizer_1.Add(self.button_37, 0, 0, 0) grid_sizer_1.Add(self.button_38, 0, 0, 0) grid_sizer_1.Add(self.button_39, 0, 0, 0) grid_sizer_1.Add(self.button_40, 0, 0, 0) grid_sizer_1.Add(self.button_41, 0, 0, 0) grid_sizer_1.Add(self.button_42, 0, 0, 0) grid_sizer_1.Add(self.button_43, 0, 0, 0) grid_sizer_1.Add(self.button_44, 0, 0, 0) grid_sizer_1.Add(self.button_45, 0, 0, 0) grid_sizer_1.Add(self.button_46, 0, 0, 0) grid_sizer_1.Add(self.button_47, 0, 0, 0) grid_sizer_1.Add(self.button_48, 0, 0, 0) grid_sizer_1.Add(self.button_49, 0, 0, 0) grid_sizer_1.Add(self.button_50, 0, 0, 0) grid_sizer_1.Add(self.button_51, 0, 0, 0) grid_sizer_1.Add(self.button_52, 0, 0, 0) grid_sizer_1.Add(self.button_53, 0, 0, 0) grid_sizer_1.Add(self.button_54, 0, 0, 0) grid_sizer_1.Add(self.button_55, 0, 0, 0) grid_sizer_1.Add(self.button_56, 0, 0, 0) grid_sizer_2.Add(self.button_57, 0, 0, 0) grid_sizer_2.Add(self.button_58, 0, 0, 0) grid_sizer_2.Add(self.button_59, 0, 0, 0) grid_sizer_2.Add(self.button_60, 0, 0, 0) grid_sizer_2.Add(self.button_61, 0, 0, 0) grid_sizer_2.Add(self.button_62, 0, 0, 0) grid_sizer_2.Add(self.button_63, 0, 0, 0) grid_sizer_2.Add(self.button_64, 0, 0, 0) grid_sizer_2.Add(self.button_65, 0, 0, 0) grid_sizer_2.Add(self.button_66, 0, 0, 0) grid_sizer_2.Add(self.button_67, 0, 0, 0) grid_sizer_2.Add(self.button_68, 0, 0, 0) grid_sizer_2.Add(self.button_69, 0, 0, 0) grid_sizer_2.Add(self.button_70, 0, 0, 0) grid_sizer_2.Add(self.button_71, 0, 0, 0) grid_sizer_2.Add(self.button_72, 0, 0, 0) grid_sizer_2.Add(self.button_73, 0, 0, 0) grid_sizer_2.Add(self.button_74, 0, 0, 0) sizer_3.Add(grid_sizer_1, 1, wx.EXPAND, 0) sizer_3.Add(grid_sizer_2, 1, wx.EXPAND, 0) sizer_2.Add(sizer_3, 1, wx.EXPAND, 0) self.SetSizer(sizer_2) sizer_2.Fit(self) self.Layout() # end wxGlade def bu37(self, event): # wxGlade: MyFrame.<event_handler> global ts ts+="7" self.text_ctrl_1.AppendText("7") event.Skip() def bu38(self, event): # wxGlade: MyFrame.<event_handler> global ts ts+="8" self.text_ctrl_1.AppendText("8") event.Skip() def bu39(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "9" self.text_ctrl_1.AppendText("9") event.Skip() def bu40(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "+" self.text_ctrl_1.AppendText("+") event.Skip() def bu41(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "-" self.text_ctrl_1.AppendText("-") event.Skip() def bu42(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "4" self.text_ctrl_1.AppendText("4") event.Skip() def bu43(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "5" self.text_ctrl_1.AppendText("5") event.Skip() def bu44(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "6" self.text_ctrl_1.AppendText("6") event.Skip() def bu45(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "*" self.text_ctrl_1.AppendText("*") event.Skip() def bu46(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "/" self.text_ctrl_1.AppendText("/") event.Skip() def bu47(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "1" self.text_ctrl_1.AppendText("1") event.Skip() def bu48(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "2" self.text_ctrl_1.AppendText("2") event.Skip() def bu49(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "3" self.text_ctrl_1.AppendText("3") event.Skip() def bu50(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "(" self.text_ctrl_1.AppendText("(") event.Skip() def bu51(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += ")" self.text_ctrl_1.AppendText(")") event.Skip() def bu52(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "0" self.text_ctrl_1.AppendText("0") event.Skip() def bu53(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "." self.text_ctrl_1.AppendText(".") event.Skip() def bu54(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "ans" self.text_ctrl_1.AppendText("ans") event.Skip() def bu55(self, event): # wxGlade: MyFrame.<event_handler> global ts self.text_ctrl_1.Clear() self.text_ctrl_2.Clear() ans=0 ts="" event.Skip() def minus_operation(self,expresstion): minus_operators = re.split("-", expresstion) calc_list = re.findall("[0-9]", expresstion) if minus_operators[0] == "": calc_list[0] = '-%s' % calc_list[0] res = reduce(lambda x, y: float(x) - float(y), calc_list) return res def del_duplicates(self,ts): ts = ts.replace("++", "+") ts = ts.replace("--", "-") ts = ts.replace("+-", "-") ts = ts.replace("--", "+") ts = ts.replace('- -', "+") return ts def mutiply_dividend(self,expresstion): calc_list = re.split("[*/]", expresstion) operators = re.findall("[*/]", expresstion) res = None for index, i in enumerate(calc_list): if res: if operators[index - 1] == '*': res *= float(i) elif operators[index - 1] == '/': res /= float(i) else: res = float(i) return res def special_features(self,plus_and_minus_operators, multiply_and_dividend): for index, i in enumerate(multiply_and_dividend): i = i.strip() if i.endswith("*") or i.endswith("/"): multiply_and_dividend[index] = multiply_and_dividend[index] + plus_and_minus_operators[index] + \ multiply_and_dividend[index + 1] del multiply_and_dividend[index + 1] del plus_and_minus_operators[index] return plus_and_minus_operators, multiply_and_dividend def minus_special(self,operator_list, calc_list): for index, i in enumerate(calc_list): if i == '': calc_list[index + 1] = i + calc_list[index + 1].strip() def figure_up(self,ts): ts = ts.strip("()") ts = self.del_duplicates(ts) plus_and_minus_operators = re.findall("[+-]", ts) multiply_and_dividend = re.split("[+-]", ts) if len(multiply_and_dividend[0].strip()) == 0: multiply_and_dividend[1] = plus_and_minus_operators[0] + multiply_and_dividend[1] del multiply_and_dividend[0] del plus_and_minus_operators[0] plus_and_minus_operators, multiply_and_dividend = self.special_features(plus_and_minus_operators, multiply_and_dividend) for index, i in enumerate(multiply_and_dividend): if re.search("[*/]", i): sub_res = self.mutiply_dividend(i) multiply_and_dividend[index] = sub_res #print(multiply_and_dividend, plus_and_minus_operators) final_res = None for index, item in enumerate(multiply_and_dividend): if final_res: if plus_and_minus_operators[index - 1] == '+': final_res += float(item) elif plus_and_minus_operators[index - 1] == '-': final_res -= float(item) else: final_res = float(item) return final_res def bu56(self, event): # wxGlade: MyFrame.<event_handler> global ans global ts if re.search("pi", ts): lists = re.findall("pi", ts) for i in range(0, len(lists)): te = str(math.pi) self.text_ctrl_2.SetValue(te) ts = re.sub("pi", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("e", ts): lists = re.findall("e", ts) for i in range(0, len(lists)): te = str(math.e) self.text_ctrl_2.SetValue(te) ts = re.sub("e", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("sin.*\)",ts): lists=re.findall("sin(.+?)",ts) for i in range(0,len(lists)): te=float(lists[i]) te=str(math.sin(te)) self.text_ctrl_2.SetValue(te) ts=re.sub("sin.*?\)",te,ts,1) #self.text_ctrl_1.SetValue(ts) if re.search("cos.*\)", ts): lists = re.findall("cos(.+?)", ts) for i in range(0, len(lists)): te = float(lists[i]) te = str(math.cos(te)) self.text_ctrl_2.SetValue(te) ts = re.sub("cos.*?\)", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("tan.*\)", ts): lists = re.findall("tan(.+?)", ts) for i in range(0, len(lists)): te = float(lists[i]) te = str(math.tan(te)) self.text_ctrl_2.SetValue(te) ts = re.sub("tan.*?\)", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("ln.*\)", ts): lists = re.findall("ln(.+?)", ts) for i in range(0, len(lists)): te = float(lists[i]) te = str(math.log(te)) self.text_ctrl_2.SetValue(te) ts = re.sub("ln.*?\)", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("log.*\)", ts): lists = re.findall("log(.+?)", ts) for i in range(0, len(lists)): te = float(lists[i]) te = str(math.log(te)/math.log(10)) self.text_ctrl_2.SetValue(te) ts = re.sub("log.*?\)", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("sqrt.*\)", ts): lists = re.findall("sqrt(.+?)", ts) for i in range(0, len(lists)): te = float(lists[i]) te = str(math.sqrt(te)) self.text_ctrl_2.SetValue(te) ts = re.sub("sqrt.*?\)", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("int.*\)", ts): lists = re.findall("int(.+?)", ts) for i in range(0, len(lists)): te=float(lists[i]) te=int(te) te = str(te) self.text_ctrl_2.SetValue(te) ts = re.sub("int.*?\)", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("ans", ts): lists = re.findall("ans", ts) for i in range(0, len(lists)): te = str(ans) self.text_ctrl_2.SetValue(te) ts = re.sub("ans", te, ts, 1) #self.text_ctrl_1.SetValue(ts) if re.search("?−?\d∗\.?\d∗?\^?−?\d∗\.?\d∗?", ts): lists1 = re.findall("?(−?\d∗\.?\d∗?)?\^", ts) lists2 = re.findall("\^?(−?\d∗\.?\d∗)?", ts) for i in range(0, len(lists1)): te1=float(lists1[i]) te2=float(lists2[i]) #print te1 #print te2 te=math.pow(te1,te2) te = str(te) self.text_ctrl_2.SetValue(te) ts = re.sub("?[0−9]∗\.?[0−9]∗??\^?[0−9]∗\.?[0−9]∗?", te, ts, 1) #self.text_ctrl_1.SetValue(ts) #ts = re.sub("?−?\d∗\.?\d∗?\^?−?\d∗\.?\d∗??", te, ts, 1) if re.search("?−?\d∗?\!", ts): lists = re.findall("?(−?\d+?)?\!", ts) for i in range(0, len(lists)): te = float(lists[i]) te = math.factorial(te) te = str(te) self.text_ctrl_2.SetValue(te) ts = re.sub("?−?\d+??\!", te, ts, 1) #self.text_ctrl_1.SetValue(ts) #print ts flag=True while flag: m = re.search("[()]∗", ts) if m: sub_res=self.figure_up(m.group()) ts=ts.replace(m.group(),str(sub_res)) else: ans=self.figure_up(ts) flag=False self.text_ctrl_2.SetValue(str(ans)) #ans= #self.text_ctrl_2.SetValue(str(ans)) # self.text_ctrl_1.Clear() event.Skip() def bu57(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "pi" self.text_ctrl_1.AppendText("pi") event.Skip() def bu58(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "e" self.text_ctrl_1.AppendText("e") event.Skip() def bu59(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "^(-1)" self.text_ctrl_1.AppendText("^(-1)") event.Skip() def bu60(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "^2" self.text_ctrl_1.AppendText("^2") event.Skip() def bu61(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "^" self.text_ctrl_1.AppendText("^") event.Skip() def bu62(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "sqrt(" self.text_ctrl_1.AppendText("sqrt(") event.Skip() def bu63(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "sin(" self.text_ctrl_1.AppendText("sin(") event.Skip() def bu64(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "cos(" self.text_ctrl_1.AppendText("cos(") event.Skip() def bu65(self, event): # wxGlade: MyFrame# .<event_handler> global ts ts += "tan(" self.text_ctrl_1.AppendText("tan(") event.Skip() def bu66(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "log(" self.text_ctrl_1.AppendText("log(") event.Skip() def bu67(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "ln(" self.text_ctrl_1.AppendText("ln(") event.Skip() def bu68(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "!" self.text_ctrl_1.AppendText("!") event.Skip() def bu69(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "m" self.text_ctrl_1.AppendText("m")#qumo event.Skip() def bu70(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "int(" self.text_ctrl_1.AppendText("int(") event.Skip() def bu71(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "u" self.text_ctrl_1.AppendText("u")#yu event.Skip() def bu72(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "|" self.text_ctrl_1.AppendText("|")#huo event.Skip() def bu73(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "n(" self.text_ctrl_1.AppendText("n(")#fei event.Skip() def bu74(self, event): # wxGlade: MyFrame.<event_handler> global ts ts += "x" self.text_ctrl_1.AppendText("x")#yihuo event.Skip() # end of class MyFrameif __name__ == "__main__": app=wx.App(False) myframe= MyFrame(None) app.MainLoop()

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