How to create a calculator - Part 2 (Phoenix)
Keywords : Calculator.
Demonstrating :
Tested py3.x, wx4.x and Win10.
Are you ready to use some samples ? 
Test, modify, correct, complete, improve and share your discoveries ! 
Sample one
1 # sample_one.py
2 # Author : komoto48g
3 # https://discuss.wxpython.org/t/i-made-a-calculator-with-20-lines-of-code-using-wx/35453
4
5 """
6
7 I made a Calculator with 20 lines of code using wx.
8
9 I upgraded this within 20 lines
10 (I had to ignored PEP8:multiple imports on one line).
11
12 """
13
14 import wx, wx.py.shell
15
16 def pack(items, orient=wx.HORIZONTAL):
17 sizer = wx.BoxSizer(orient)
18 for item in items:
19 sizer.Add(item, 1, wx.EXPAND|wx.ALL, 0)
20 return sizer
21
22 def bt_press(key):
23 if key == 'C': disp.clearCommand()
24 elif key == '<': disp.DeleteBack()
25 elif key == '=': disp.Execute(disp.getCommand())
26 else : disp.write(key)
27
28 app = wx.App()
29 self = wx.Frame(None, title="wxcalc ver.2")
30
31 keys = '()C<789/456*123-.0=+'
32 btns = [[wx.Button(self, label=c) for c in keys[i:i+4]] for i in range(0,20,4)]
33 disp = wx.py.shell.Shell(self)
34
35 self.Bind(wx.EVT_BUTTON, lambda v: bt_press(v.EventObject.Label) or disp.SetFocus())
36 self.SetSizer(pack([disp] + [pack(x) for x in btns], orient=wx.VERTICAL))
37 self.Show()
38 app.MainLoop()
Sample two
1 # sample_two.py
2 # Author : da-dada
3 # https://discuss.wxpython.org/t/i-made-a-calculator-with-20-lines-of-code-using-wx/35453
4
5 """
6
7 I made a Calculator with 20 lines of code using wx.
8
9 I upgraded this within 20 lines
10 (I had to ignored PEP8:multiple imports on one line).
11
12 """
13
14 import wx
15
16 def pack(items, orient=wx.HORIZONTAL):
17 sizer = wx.BoxSizer(orient)
18 sizer.AddMany([(i, 1, wx.EXPAND | wx.ALL, 0) for i in items])
19 return sizer
20
21 def bt_press(key):
22 disp.Value = {'C': lambda v: '', '<': lambda v: v[:-1], '=': lambda v: str(round(eval(v),16))}[key](disp.Value) if key in ['C','=','<'] else (disp.Value + key)
23
24 app, self = wx.App(), wx.Frame(None, title="wxcalc")
25 disp = wx.TextCtrl(self)
26
27 self.Bind(wx.EVT_BUTTON, lambda v: bt_press(v.EventObject.Label))
28 self.SetSizer(pack([disp] + [pack(x) for x in [[wx.Button(self, label=c) for c in '()C<789/456*123-.0=+'[i:i+4]] for i in range(0,20,4)]], orient=wx.VERTICAL))
29 self.Show()
30 app.MainLoop()
Sample three
1 # !/usr/bin/env python3
2 # -*- coding : utf-8 -*-
3
4 # sample_three.py
5 # Megumi221
6 # https://ideal-user-interface.hatenablog.com/entry/20090711/1247328263
7
8 # BritishUnit.py (2009/07/11 23:58:30)
9 #------------------------------------------------------------------------
10 import wx
11 import os, sys
12 import time
13
14 # French conversion :
15 # Length = Longueur
16 # Area = Aire
17 # Velocity = Vitesse
18 # Mass = Masse
19 # Energy = Énergie
20 # Temperature = Température
21 # Density = Densité
22 # Mass flux = Flux massique
23 # Enthalpy = Enthalpie
24 # Pressure = Pression
25 # Heat = Chaleur
26
27
28 ChoiceList = ["Length [ft]", "Area [ft^2]", "Velocity [ft/s]",
29 "Mass [lbm]", "Energy [Btu]", "Temperature [F]",
30 "Density [lbm/ft^3]", "Mass flux [lbm/s]", "Enthalpy [Btu/lbm]",
31 "Pressure [psia]", "Pressure [lbf/ft^2]", "Heat [Btu/s]"]
32
33 SIList = ["[m]", "[m^2]", "[m/s]",
34 "[kg]", "[kJ]", "[C]",
35 "[kg/m^3]", "[kg/s]", "[kJ/kg]",
36 "[Pa]", "[Pa]", "[W]"]
37
38 coeff = [0.3048, 0.3048**2, 0.3048,
39 0.45359237, 1.055, 5.0/9.0,
40 0.45359237/(0.3048)**3, 0.45359237, 1.055/0.45359237,
41 703.07*9806.65, 4.44822/(0.3048)**2, 1055.0]
42
43 bb = [0.0, 0.0, 0.0,
44 0.0, 0.0, 32.0,
45 0.0, 0.0, 0.0,
46 0.0, 0.0, 0.0]
47
48
49 class MainFrame(wx.Frame):
50 def __init__(self, id, title):
51 width, height = 480,130
52 wx.Frame.__init__(self, id, title="Changing unit",
53 size=wx.Size(width, height))
54
55 _icon = wx.Icon('icons/wxwin.ico', wx.BITMAP_TYPE_ICO)
56 self.SetIcon(_icon)
57
58 Pan = wx.Panel(self, -1)
59
60 self.Chce = wx.Choice(Pan, -1, choices=ChoiceList)
61 self.TxtCtl = wx.TextCtrl(Pan, -1, "Enter a value", size=(130,-1))
62 self.StTxt1 = wx.StaticText(Pan, -1, " = ")
63 self.Btn = wx.Button(Pan, -1, "&Convert") # 換算する
64
65 self.Chce.Bind(wx.EVT_CHOICE, self.OnChoice)
66 self.Btn.Bind(wx.EVT_BUTTON, self.ConvUnit)
67
68 vsizer0 = wx.BoxSizer(wx.VERTICAL)
69 hsizer1 = wx.BoxSizer(wx.HORIZONTAL)
70 hsizer1.Add(self.TxtCtl, 0, wx.ALIGN_LEFT|wx.ALL, 5)
71 hsizer1.Add(self.Chce, 0, wx.ALIGN_LEFT|wx.ALL, 5)
72 hsizer1.Add(self.StTxt1, 0, wx.ALIGN_LEFT|wx.ALL, 5)
73 vsizer0.Add(hsizer1,0, wx.ALIGN_LEFT|wx.ALL, 5)
74 vsizer0.Add(self.Btn,0, wx.ALIGN_LEFT|wx.ALL, 10)
75 Pan.SetSizer(vsizer0)
76 vsizer0.Fit(Pan)
77
78
79 def OnChoice(self, event):
80 pass
81
82
83 def ConvUnit(self, event):
84 BtVal= float(self.TxtCtl.GetValue())
85 CNum = self.Chce.GetSelection()
86 SiVal= (BtVal-bb[CNum])*coeff[CNum]
87 newString = "= " + str(SiVal) + SIList[CNum]
88 self.StTxt1.SetLabel(newString)
89
90
91 class Application(wx.App):
92 def OnInit(self):
93 frame = MainFrame(None, -1)
94 frame.Show(True)
95 self.SetTopWindow(frame)
96 return True
97
98
99 def main():
100 app = Application(0)
101 app.MainLoop()
102
103
104 if __name__ == '__main__':
105 main()
Sample four
1 # sample_four.py
2 # https://codingshiksha.com/python/python-3-wxpython-temperature-converter-celsius-kelvin-fahrenheit-gui-script-desktop-app-full-project-for-beginners/
3
4 import wx
5
6 def temperature_converter(value, convert_from, convert_to):
7
8 def celsius_converter(value, convert_to):
9 """
10 Converts from Celsius to Fahrenheit or Kelvin.
11 """
12 if convert_to == "°F":
13 return f"{str((round(value * 9/5 + 32, 2)))} {convert_to}"
14 elif convert_to == "K":
15 return f"{str(round((value + 273.15), 2))} {convert_to}"
16
17 def fahrenheit_converter(value, convert_to):
18 """
19 Converts from Fahrenheit to Celsius or Kelvin.
20 """
21 if convert_to == "°C":
22 return f"{str(round((value - 32) * 5/9, 2))} {convert_to}"
23 elif convert_to == "K":
24 return f"{str(round((value - 32) * 5/9 + 273.15, 2))} {convert_to}"
25
26 def kelvin_converter(value, convert_to):
27 """
28 Converts from Kelvin to Celsius or Fahrenheit.
29 """
30 if convert_to == "°C":
31 return f"{str(round(value - 273.15, 2))} {convert_to}"
32 elif convert_to == "°F":
33 return f"{str(round((value - 273.15) * 9/5 + 32, 2))} {convert_to}"
34
35 converters = {"°C": celsius_converter(value, convert_to),
36 "°F": fahrenheit_converter(value, convert_to),
37 "K": kelvin_converter(value, convert_to)
38 }
39 return converters[convert_from]
40
41 #-------------------------------------------------------------------------------
42
43 class TempConverterInterface(wx.Frame):
44 def __init__(self, parent, style, title):
45 super().__init__(parent, style=style, title=title, size=(310, 200))
46
47 self.InitUI()
48 self.Centre()
49 self.Show()
50
51 def InitUI(self):
52
53 panel = wx.Panel(self)
54 font = wx.SystemSettings.GetFont(wx.SYS_SYSTEM_FONT)
55 font.SetPointSize(9)
56 hbox = wx.BoxSizer(wx.VERTICAL)
57
58 fgs = wx.FlexGridSizer(rows=4, cols=2, vgap=10, hgap=15)
59
60 temp_value = wx.StaticText(panel, label="Temperature Value : ")
61 temp_value.SetFont(font)
62 from_temp = wx.StaticText(panel, label="From : ")
63 from_temp.SetFont(font)
64 to_temp = wx.StaticText(panel, label="To : ")
65 to_temp.SetFont(font)
66 calc_button = wx.Button(panel, label="&Calculate")
67 calc_button.Bind(wx.EVT_BUTTON, self.on_press_calculate)
68 self.result = wx.StaticText(panel, label='', pos=(10, 10))
69 font.SetPointSize(14)
70 self.result.SetFont(font)
71
72 self.tc1 = wx.TextCtrl(panel)
73 self.tc2_combo = wx.ComboBox(
74 panel, choices=["°C", "°F", "K"], style=wx.CB_READONLY)
75 self.tc3_combo = wx.ComboBox(
76 panel, choices=["°C", "°F", "K"], style=wx.CB_READONLY)
77
78 fgs.AddMany([(temp_value), (self.tc1, 1, wx.EXPAND), (from_temp),
79 (self.tc2_combo, 1, wx.EXPAND), (to_temp, 1,
80 wx.EXPAND), (self.tc3_combo, 1, wx.EXPAND), (calc_button),
81 (self.result, 1, wx.RIGHT)])
82
83 hbox.Add(fgs, proportion=1, flag=wx.ALL | wx.EXPAND, border=15)
84
85 panel.SetSizer(hbox)
86
87 def ShowValueErrorMessage(self):
88 wx.MessageBox('You entered an invalid value.', 'Value Error',
89 style=wx.OK | wx.ICON_ERROR)
90
91 def ShowTypeErrorMessage(self):
92 wx.MessageBox('Origin and final temperature units must be different.', 'Unit Type Error',
93 style=wx.OK | wx.ICON_ERROR)
94
95 def on_press_calculate(self, event):
96 try:
97 self.result.Label = temperature_converter(value=float(self.tc1.GetValue()),
98 convert_from=self.tc2_combo.GetValue(),
99 convert_to=self.tc3_combo.GetValue())
100 except ValueError:
101 self.ShowValueErrorMessage()
102 except TypeError:
103 self.ShowTypeErrorMessage()
104
105 #-------------------------------------------------------------------------------
106
107 def main():
108
109 app = wx.App()
110 frame = TempConverterInterface(None, style=wx.MINIMIZE_BOX |
111 wx.SYSTEM_MENU | wx.CAPTION |
112 wx.CLOSE_BOX,
113 title='Temperature Converter')
114 frame.Show()
115 app.MainLoop()
116
117
118 if __name__ == '__main__':
119 main()
Sample five
1 # sample_five.py
2
3 '''
4 Created on Dec 30, 2013
5
6 @author: Tuna
7 '''
8
9 import wx
10
11 title1 = """
12 This program will calculate your BMI
13 (Body Mass Index) based on
14 your height and weight.
15 """
16
17 title2 = """
18 Here is the BMI Range :
19 Very severely underweight : 0-14.9
20 Severly underweight : 15-15.9
21 Underweight : 16-17.9
22 Normal (healthy weight) : 18-24.9
23 Overweight : 25-29.9
24 Moderately obese : 30-34.9
25 Severely obese : 35-39.9
26 Very severely obese : 40+
27 """
28
29 #-------------------------------------------------------------------------------
30
31 class User():
32
33 def __init__(self):
34 self.bmi_dict = {
35 'very severely underweight': [0,150],
36 'severly underweight':[150,160],
37 'underweight':[160,180],
38 'normal (healthy weight)':[180,250],
39 'overweight':[250,300],
40 'moderately obese':[300,350],
41 'severely obese':[350,400],
42 'very severely obese':[400,1000]
43 }
44
45 def bmi_calc(self):
46 if self.height=='0':
47 return 0
48 else:
49 return (float(self.weight)/(float(self.height)**2))*703
50
51 def category(self):
52 for cat in self.bmi_dict:
53 updbmi = int(round(self.bmi*10))
54 if updbmi in range(self.bmi_dict[cat][0],self.bmi_dict[cat][1]):
55 return cat
56 return None
57
58 #===============================================================================
59 # test1=User()
60 # test1.weight=270
61 # test1.height=73
62 # test1.bmi=test1.bmi_calc()
63 # test1.bmi=int(round(test1.bmi,0))
64 # assert(test1.bmi==36)
65 # test1.bmi_category=test1.category()
66 # assert(test1.bmi_category=='severely obese')
67 #
68 # test2=User()
69 # test2.weight=130
70 # test2.height=65
71 # test2.bmi=test2.bmi_calc()
72 # test2.bmi=int(round(test2.bmi,0))
73 # assert(test2.bmi==22)
74 # test2.bmi_category=test2.category()
75 # assert(test2.bmi_category=='normal (healthy weight)')
76 #===============================================================================
77
78 class RootApp(wx.Frame):
79 def closewindow(self, event):
80 '''Upon click of red X'''
81 self.Destroy()
82
83
84 def bmiFind(self, event):
85 self.user = User()
86 self.weight = self.tc3.GetValue()
87 self.user.weight = self.weight
88 self.height = self.tc4.GetValue()
89 self.user.height = self.height
90 self.bmi = self.user.bmi_calc()
91 self.user.bmi = self.bmi
92 self.st5.SetLabel("Your BMI is " + str(int(self.bmi)) + ".")
93 self.category = self.user.category()
94 self.st6.SetLabel("You are " + self.category + ".")
95
96
97 def __init__(self, parent, id):
98 wx.Frame.__init__(self, parent, id, title="BMI Calculator v0.1", size=(250, 385))
99
100 panel = wx.Panel(self)
101 vbox = wx.BoxSizer(wx.VERTICAL)
102
103 '''Create BMI.User object'''
104
105 st8 = wx.StaticText(panel, label=title1, style=wx.ALIGN_CENTRE_HORIZONTAL)
106
107 st9 = wx.StaticText(panel, label=title2)
108
109 '''Name'''
110
111 '''Age'''
112
113 '''Weight'''
114
115 hbox3 = wx.BoxSizer(wx.HORIZONTAL)
116 st3a = wx.StaticText(panel, label='Weight :')
117 hbox3.Add(st3a, flag=wx.RIGHT, border=80)
118 self.tc3 = wx.TextCtrl(panel, value='0')
119 hbox3.Add(self.tc3, proportion=1, flag=wx.LEFT|wx.RIGHT, border=10)
120 st3b = wx.StaticText(panel, label='lbs')
121 hbox3.Add(st3b, flag=wx.RIGHT, border=10)
122
123 '''Height'''
124
125 hbox4 = wx.BoxSizer(wx.HORIZONTAL)
126 st4a = wx.StaticText(panel, label='Height :')
127 hbox4.Add(st4a, flag=wx.RIGHT, border=83)
128 self.tc4 = wx.TextCtrl(panel, value='0')
129 hbox4.Add(self.tc4, proportion=1, flag=wx.LEFT|wx.RIGHT, border=10)
130 st4b = wx.StaticText(panel, label='inches')
131 hbox4.Add(st4b, flag=wx.RIGHT, border=10)
132
133 '''BMI result'''
134
135 hbox5 = wx.BoxSizer(wx.HORIZONTAL)
136 self.st5 = wx.StaticText(panel, label='')
137 hbox5.Add(self.st5)
138
139 '''BMI Category result'''
140
141 hbox6 = wx.BoxSizer(wx.HORIZONTAL)
142 self.st6 = wx.StaticText(panel, label='')
143 hbox6.Add(self.st6)
144
145 '''Calculate Button'''
146
147 hbox7 = wx.BoxSizer(wx.HORIZONTAL)
148 buttonCalc = wx.Button(panel, wx.ID_ANY, label='&Calculate BMI', size=(220,25))
149 hbox7.Add(buttonCalc, flag=wx.EXPAND)
150
151 '''Bind Buttons'''
152
153 self.Bind(wx.EVT_CLOSE, self.closewindow)
154 self.Bind(wx.EVT_BUTTON, self.bmiFind, source=buttonCalc)
155
156 '''Add horizontal boxes to vertical box'''
157
158 vbox.Add(st8, flag=wx.EXPAND|wx.TOP|wx.LEFT|wx.BOTTOM, border=10)
159 vbox.Add(st9, flag=wx.EXPAND|wx.TOP|wx.LEFT, border=10)
160 vbox.Add((-1,10))
161 vbox.Add(hbox3, flag=wx.EXPAND|wx.LEFT|wx.BOTTOM, border=10)
162 vbox.Add(hbox4, flag=wx.EXPAND|wx.LEFT|wx.BOTTOM, border=10)
163 vbox.Add(hbox5, flag=wx.EXPAND|wx.LEFT|wx.BOTTOM, border=10)
164 vbox.Add(hbox6, flag=wx.EXPAND|wx.LEFT|wx.BOTTOM, border=10)
165 vbox.Add(hbox7, flag=wx.EXPAND|wx.LEFT|wx.BOTTOM, border=10)
166 panel.SetSizer(vbox)
167
168 #-------------------------------------------------------------------------------
169
170 if __name__=='__main__':
171 app = wx.App()
172 frame = RootApp(parent=None, id=-1)
173 frame.SetSize(500, 500)
174 frame.CentreOnScreen()
175 #frame.Move((1450,500))
176 frame.Show()
177 app.MainLoop()
Sample six
![[ATTACH]](/How%20to%20create%20a%20calculator%20-%20Part%202%20%28Phoenix%29?action=AttachFile&do=upload_form&ticket=00676871ab.8b7aeca4681f972f34227dcc92e80c2eb3cac4ee&target=img_sample_six.png "[ATTACH]"){kind=small}
1 # sample_six.py
Sample seven
![[ATTACH]](/How%20to%20create%20a%20calculator%20-%20Part%202%20%28Phoenix%29?action=AttachFile&do=upload_form&ticket=00676871ab.8b7aeca4681f972f34227dcc92e80c2eb3cac4ee&target=img_sample_seven.png "[ATTACH]"){kind=small}
1 # sample_seven.py
Sample eight
![[ATTACH]](/How%20to%20create%20a%20calculator%20-%20Part%202%20%28Phoenix%29?action=AttachFile&do=upload_form&ticket=00676871ab.8b7aeca4681f972f34227dcc92e80c2eb3cac4ee&target=img_sample_eight.png "[ATTACH]"){kind=small}
1 # sample_eight.py
Sample nine
![[ATTACH]](/How%20to%20create%20a%20calculator%20-%20Part%202%20%28Phoenix%29?action=AttachFile&do=upload_form&ticket=00676871ab.8b7aeca4681f972f34227dcc92e80c2eb3cac4ee&target=img_sample_nine.png "[ATTACH]"){kind=small}
1 # sample_nine.py
Sample ten
![[ATTACH]](/How%20to%20create%20a%20calculator%20-%20Part%202%20%28Phoenix%29?action=AttachFile&do=upload_form&ticket=00676871ab.8b7aeca4681f972f34227dcc92e80c2eb3cac4ee&target=img_sample_ten.png "[ATTACH]"){kind=small}
1 # sample_ten.py
Sample eleven
![[ATTACH]](/How%20to%20create%20a%20calculator%20-%20Part%202%20%28Phoenix%29?action=AttachFile&do=upload_form&ticket=00676871ab.8b7aeca4681f972f34227dcc92e80c2eb3cac4ee&target=img_sample_eleven.png "[ATTACH]"){kind=small}
1 # sample_eleven.py
Download source
Additional Information
Link :
- - - - -
https://wiki.wxpython.org/TitleIndex
Thanks to
komoto48g (sample_one.py coding), da-dada (sample_two.py coding), Megumi221 (sample_three.py), codingshiksha (sample_four.py), Tuna (sample_five.py), the wxPython community...
About this page
Date(d/m/y) Person (bot) Comments :
14/01/23 - Ecco (Created page for wxPython Phoenix).
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