Python實現(xiàn)簡易計算器的示例代碼
上次我用我學習的python做一個簡易的計算器,我對計算器進行了,更改優(yōu)化,變成了一個真正的計算器
實現(xiàn)流程
1.計算機布局
2.計算機執(zhí)行
首先導入模塊:
Tkinter 作為 Python GUI 開發(fā)工具之一,它具有 GUI 軟件包的必備的常用功能。比如,它提供了十多種不同類型的窗口控件、窗口布局管理器、事件處理機制等,加之其開發(fā)效率高、代碼簡潔易讀
import tkinter as tk #Python3標準安裝包中自帶tkinter,即不用安裝,導入即可使用。 #可以從命令行運行python -m tkinter會打開一個窗口 #演示一個簡單的Tk接口,證明tkinter已正確安裝在系統(tǒng)上. #python -m tkinter
計算器布局
1、先完成整個計算機的布局及其它輸出結果的一欄
前面完成整體布局就細化計算器中的按鈕
1、前四行代碼是定義按鈕的符號、長寬、字體、顏色
2、后四行是按鈕的間距
root = tk.Tk() root.title('計算器') root.geometry('295x280+100+100') #邊距 font = ('宋體', 20) font_16 = ('宋體', 16) root.attributes("-alpha", 0.9) #設置透明度 result_num = tk.StringVar() #賦予可變變量 result_num.set('') tk.Label(root, textvariable=result_num, font=font, height=2, width=20, justify=tk.LEFT, anchor=tk.SE ).grid(row=1, column=1, columnspan=4) #顯示結果的布局 button_clear = tk.Button(root, text='C', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') #定義按鈕的符號、長寬、字體、顏色 button_back = tk.Button(root, text='←', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') #定義按鈕的符號、長寬、字體、顏色 button_division = tk.Button(root, text='÷', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') #定義按鈕的符號、長寬、字體、顏色 button_multiplication = tk.Button(root, text='×', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') #定義按鈕的符號、長寬、字體、顏色 button_clear.grid(row=2, column=1, padx=4, pady=2) button_back.grid(row=2, column=2, padx=4, pady=2) button_division.grid(row=2, column=3, padx=4, pady=2) button_multiplication.grid(row=2, column=4, padx=4, pady=2) #定義按鈕位置 #依葫蘆畫瓢 button_seven = tk.Button(root, text='7', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_eight = tk.Button(root, text='8', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_nine = tk.Button(root, text='9', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_subtraction = tk.Button(root, text='-', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_seven.grid(row=3, column=1, padx=4, pady=2) button_eight.grid(row=3, column=2, padx=4, pady=2) button_nine.grid(row=3, column=3, padx=4, pady=2) button_subtraction.grid(row=3, column=4, padx=4, pady=2) #依葫蘆畫瓢 button_four = tk.Button(root, text='4', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_five = tk.Button(root, text='5', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_six = tk.Button(root, text='6', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_addition = tk.Button(root, text='+', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_four.grid(row=4, column=1, padx=4, pady=2) button_five.grid(row=4, column=2, padx=4, pady=2) button_six.grid(row=4, column=3, padx=4, pady=2) button_addition.grid(row=4, column=4, padx=4, pady=2) #依葫蘆畫瓢 button_one = tk.Button(root, text='1', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_two = tk.Button(root, text='2', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_three = tk.Button(root, text='3', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_equal = tk.Button(root, text='=', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_one.grid(row=5, column=1, padx=4, pady=2) button_two.grid(row=5, column=2, padx=4, pady=2) button_three.grid(row=5, column=3, padx=4, pady=2) button_equal.grid(row=5, column=4, padx=4, pady=2) button_zero1 = tk.Button(root, text=' ', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_zero = tk.Button(root, text='0', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_dot = tk.Button(root, text='.', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_equal2 = tk.Button(root, text=' ', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_zero1.grid(row=6, column=1, padx=4, pady=2) button_zero.grid(row=6, column=2, padx=4, pady=2) button_dot.grid(row=6, column=3, padx=4, pady=2) button_equal2.grid(row=6, column=4, padx=4, pady=2)
計算機執(zhí)行
計算器布局完成后(主體和細節(jié)) 賦予計算器計算能力
1、點擊按鈕實現(xiàn)出現(xiàn)結果輸出欄及計算器的輸出欄
2、賦予事件能力
def click_button(x): print('X:\t', x) result_num.set(result_num.get() + x)
點擊按鈕可以輸入所對應的結果 并且調用lambda函數(shù)計算輸入結果并反饋
ambda 函數(shù)是匿名的: 所謂匿名函數(shù),通俗地說就是沒有名字的函數(shù)。lambda函數(shù)沒有名字。 lambda 函數(shù)有輸入和輸出: 輸入是傳入到參數(shù)列表argument_list的值,輸出是根據(jù)表達式expression計算得到的值。
button_one.config(command=lambda: click_button('1')) button_two.config(command=lambda: click_button('2')) button_three.config(command=lambda: click_button('3')) button_four.config(command=lambda: click_button('4')) button_five.config(command=lambda: click_button('5')) button_six.config(command=lambda: click_button('6')) button_seven.config(command=lambda: click_button('7')) button_eight.config(command=lambda: click_button('8')) button_nine.config(command=lambda: click_button('9')) button_zero.config(command=lambda: click_button('0')) button_dot.config(command=lambda: click_button('.')) button_addition.config(command=lambda: click_button('+')) button_subtraction.config(command=lambda: click_button('-')) button_multiplication.config(command=lambda: click_button('*')) button_division.config(command=lambda: click_button('/')) button_clear.config(command=lambda: btnClearDisplay()) button_equal.config(command=calculation)
調用calculation時間用來計算輸入結果 其中str來轉化字符串.
調用btnClearDisplay清除來清空輸入結果
def calculation(): opt_str = result_num.get() result = eval(opt_str) result_num.set(str(result)) def btnClearDisplay(): opt_str = result_num.get() result = eval(str(opt_str)) result_num.set("")
最后一行代碼不需要觸發(fā)lambda 因為不需要匿名函數(shù)也不用傳遞參數(shù)
button_clear.config(command=lambda: btnClearDisplay()) button_equal.config(command=calculation)
代碼展示
import tkinter as tk root = tk.Tk() root.title('計算器') root.geometry('295x280+100+100') font = ('宋體', 20) font_16 = ('宋體', 16) root.attributes("-alpha", 0.9) result_num = tk.StringVar() result_num.set('') tk.Label(root, textvariable=result_num, font=font, height=2, width=20, justify=tk.LEFT, anchor=tk.SE ).grid(row=1, column=1, columnspan=4) button_clear = tk.Button(root, text='C', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_back = tk.Button(root, text='←', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_division = tk.Button(root, text='÷', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_multiplication = tk.Button(root, text='×', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_clear.grid(row=2, column=1, padx=4, pady=2) button_back.grid(row=2, column=2, padx=4, pady=2) button_division.grid(row=2, column=3, padx=4, pady=2) button_multiplication.grid(row=2, column=4, padx=4, pady=2) button_seven = tk.Button(root, text='7', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_eight = tk.Button(root, text='8', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_nine = tk.Button(root, text='9', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_subtraction = tk.Button(root, text='-', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_seven.grid(row=3, column=1, padx=4, pady=2) button_eight.grid(row=3, column=2, padx=4, pady=2) button_nine.grid(row=3, column=3, padx=4, pady=2) button_subtraction.grid(row=3, column=4, padx=4, pady=2) button_four = tk.Button(root, text='4', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_five = tk.Button(root, text='5', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_six = tk.Button(root, text='6', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_addition = tk.Button(root, text='+', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_four.grid(row=4, column=1, padx=4, pady=2) button_five.grid(row=4, column=2, padx=4, pady=2) button_six.grid(row=4, column=3, padx=4, pady=2) button_addition.grid(row=4, column=4, padx=4, pady=2) button_one = tk.Button(root, text='1', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_two = tk.Button(root, text='2', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_three = tk.Button(root, text='3', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_equal = tk.Button(root, text='=', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_one.grid(row=5, column=1, padx=4, pady=2) button_two.grid(row=5, column=2, padx=4, pady=2) button_three.grid(row=5, column=3, padx=4, pady=2) button_equal.grid(row=5, column=4, padx=4, pady=2) button_zero1 = tk.Button(root, text=' ', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_zero = tk.Button(root, text='0', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_dot = tk.Button(root, text='.', width=5, font=font_16, relief=tk.FLAT, bg='#eacda1') button_equal2 = tk.Button(root, text=' ', width=5, font=font_16, relief=tk.FLAT, bg='#b1b2b2') button_zero1.grid(row=6, column=1, padx=4, pady=2) button_zero.grid(row=6, column=2, padx=4, pady=2) button_dot.grid(row=6, column=3, padx=4, pady=2) button_equal2.grid(row=6, column=4, padx=4, pady=2) def click_button(x): print('X:\t', x) result_num.set(result_num.get() + x) def calculation(): opt_str = result_num.get() result = eval(opt_str) result_num.set(str(result)) def btnClearDisplay(): opt_str = result_num.get() result = eval(str(opt_str)) result_num.set("") button_one.config(command=lambda: click_button('1')) button_two.config(command=lambda: click_button('2')) button_three.config(command=lambda: click_button('3')) button_four.config(command=lambda: click_button('4')) button_five.config(command=lambda: click_button('5')) button_six.config(command=lambda: click_button('6')) button_seven.config(command=lambda: click_button('7')) button_eight.config(command=lambda: click_button('8')) button_nine.config(command=lambda: click_button('9')) button_zero.config(command=lambda: click_button('0')) button_dot.config(command=lambda: click_button('.')) button_addition.config(command=lambda: click_button('+')) button_subtraction.config(command=lambda: click_button('-')) button_multiplication.config(command=lambda: click_button('*')) button_division.config(command=lambda: click_button('/')) button_clear.config(command=lambda: btnClearDisplay()) button_equal.config(command=calculation) root.mainloop()
運行展示
可以看到計算器的頁面特別好看,跟著我一起學python,成就感滿滿 ?。?!
到此這篇關于Python實現(xiàn)簡易計算器的示例代碼的文章就介紹到這了,更多相關Python計算器內(nèi)容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家!
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