回答編集履歴
1
追記
test
CHANGED
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@@ -69,3 +69,99 @@
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69
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root.mainloop()
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```
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---
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追記：
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74
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sym.solveset() の戻り値は数式みたいだから eval() で計算してみたわ。
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でもこのコードだと解が虚数のときは解けないわ。
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78
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整数のみで表示する方法だけれど、float型の変数が整数かどうかをis_integer()で調べて、Trueの場合はint型に変換してみたわ。
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80
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Classを使った理由は見やすくするためよ。
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```
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from tkinter import *
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from tkinter import ttk
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from tkinter import messagebox
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import sympy as sym
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from numpy import sqrt
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def isOk(diff):
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if not diff.encode('utf-8').isdigit():
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# 妥当でない（半角数字でない）場合はFalseを返却
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return False
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# 妥当（半角数字である）の場合はTrueを返却
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return True
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root = Tk()
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tcl_isOk = root.register(isOk)
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root.title("Quadratic Equations Calculator")
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root.geometry('400x400')
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la1 = ttk.Label(root, text ='ax^2 + bx + c = 0')
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la1.pack(pady=20)
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la2 = ttk.Label(root, text ='Enter values for a, b and c:')
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la2.pack(pady=20)
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la3 = ttk.Label(root, text ='a =')
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la3.pack()
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en3 = ttk.Entry(root, validate='key', validatecommand=(tcl_isOk, '%S'))
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en3.pack()
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la4 = ttk.Label(root, text ='b =')
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la4.pack()
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en4 = ttk.Entry(root, validate='key', validatecommand=(tcl_isOk, '%S'))
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en4.pack()
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la5 = ttk.Label(root, text ='c =')
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la5.pack()
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en5 = ttk.Entry(root, validate='key', validatecommand=(tcl_isOk, '%S'))
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en5.pack()
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def compute_button():
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a = en3.get()
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b = en4.get()
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c = en5.get()
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c = -1
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#sym.init_printing()
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a, b, c, x = sym.symbols("{} {} {} x".format(a, b, c))
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ans = sym.solveset(a*x**2 + b*x + c, x)
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ans_1 = eval(str(list(ans)[0]))
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ans_2 = eval(str(list(ans)[1]))
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if ans_1.is_integer():
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la6.configure(text = "x = " + str(int(ans_1)))
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else:
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la6.configure(text = "x = " + str(ans_1))
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if ans_1.is_integer():
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la6.configure(text = "x = " + str(int(ans_2)))
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else:
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la6.configure(text = "x = " + str(ans_2))
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computebutton = ttk.Button(root, text ='Compute', command = compute_button)
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computebutton.pack()
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def help_button():
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messagebox.showinfo('Help', 'You can only enter integers.')
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helpbutton = ttk.Button(root, text ='Help', command = help_button)
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helpbutton.pack(pady=3)
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def quit_button():
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root.destroy()
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quitbutton = ttk.Button(root, text ='Quit', command = quit_button)
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quitbutton.pack(pady=3)
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la6 = ttk.Label(root, text ='x = ')
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la6.pack()
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la7 = ttk.Label(root, text ='x = ')
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la7.pack()
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root.mainloop()
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```
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