用python简单代码做一个计算器

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用python简单代码做一个计算器

用python简单代码做一个计算器 import tkinter as tk class Calc(tk.Tk): """计算器窗体类""" def __init__(self): """初始化实例""" tk.Tk.__init__(self) self.title("计算器") self.memory = 0 # 暂存数值 self.create() def create(self): """创建界面""" btn_list = ["C", "M->", "->M", "/", "7", "8", "9", "*", "4", "5", "6", "-", "1", "2", "3", "+", "+/-", "0", ".", "="] r = 1 c = 0 for b in btn_list: self.button = tk.Button(self, text=b, width=5, command=(lambda x=b: self.click(x))) self.button.grid(row=r, column=c, padx=3, pady=6) c += 1 if c > 3: c = 0 r += 1 self.entry = tk.Entry(self, width=24, borderwidth=2, bg="yellow", font=("Consolas", 12)) self.entry.grid(row=0, column=0, columnspan=4, padx=8, pady=6) def click(self, key): """响应按钮""" if key == "=": # 输出结果 result = eval(self.entry.get()) self.entry.insert(tk.END, " = " + str(result)) elif key == "C": # 清空输入框 self.entry.delete(0, tk.END) elif key == "->M": # 存入数值 self.memory = self.entry.get() if "=" in self.memory: ix = self.memory.find("=") self.memory = self.memory[ix + 2:] self.title("M=" + self.memory) elif key == "M->": # 取出数值 if self.memory: self.entry.insert(tk.END, self.memory) elif key == "+/-": # 正负翻转 if "=" in self.entry.get(): self.entry.delete(0, tk.END) elif self.entry.get()[0] == "-": self.entry.delete(0) else: self.entry.insert(0, "-") else: # 其他键 if "=" in self.entry.get(): self.entry.delete(0, tk.END) self.entry.insert(tk.END, key) if __name__ == "__main__": Calc().mainloop()

结果展示：

小编在这里是用jupyter 运行成功的。 有什么问题可以在评论中指出哦，小编会一一回答你们的。

本文标签： 做一个计算器代码简单Python