calc.py · 刘申/calc

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calc

calc.py

calc.py 3.95 KB

#coding:utf-8
import sys
from PyQt5 import uic
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindow

class Calc(QMainWindow):
 def __init__(self):
 QMainWindow.__init__(self)

self.x = None
 self.y = None
 self.result = None
 self.operator = None
 self.equal = None
 self.upOperator = None
 # self.clear = None

uic.loadUi('calc.ui',self)
 
 btns = [
 self.pushButton0,
 self.pushButton1,
 self.pushButton2,
 self.pushButton3,
 self.pushButton4,
 self.pushButton5,
 self.pushButton6,
 self.pushButton7,
 self.pushButton8,
 self.pushButton9,
 self.pushButton_clear,
 self.pushButton_add,
 self.pushButton_sub,
 self.pushButton_div,
 self.pushButton_mul,
 self.pushButton_dot,
 self.pushButton_equal
 ]
 map(lambda btn:btn.clicked.connect(self.click_on_button),btns)#映射
 
 def calculate(self):
 """
 如果x,y,operater不为空,计算结果。
 """
 if self.x and self.y and self.operator:
 self.result = str(eval("%s%s%s"%(self.x
 ,self.operator,self.y)))
 self.text_result.setText(self.result)

def click_on_button(self):

print "点击按钮前:",self.x,self.operator,self.y
 value = self.sender().text()

#如果点击的是数字,print改数字
 if value in '0123456789.':
 print "你点的数字是:",value
 try:
 if self.operator is None:
 #如果点击的是数字的话,保存到x或追加到x
 if self.x is None:
 if value != '0':
 self.x = value 
 else:
 self.x += value
 if self.x is not None:
 self.text_result.setText(self.x)
 else:
 
 if self.y is None:
 if value != '0':
 self.y = value 
 else:
 self.y += value
 if self.y is not None:
 self.text_result.setText(self.y)
 
 except Exception ,e:
 print e
 
 #如果点击的是运算符,print改运算符
 elif value in '+-*/':
 print "你点击的运算符是:",value
 self.operator = value
 if self.upOperator is not None:
 print "上一个运算符是:",self.upOperator
 self.x = self.x + self.upOperator +self.y
 self.y = None
 # else:
 # self.x = self.x + self.upOperator + self.y
 self.upOperator = value
 # self.y = None
 self.text_result.setText(" ")

elif value == "=":
 print "你点击的是:=",value

self.calculate()
 self.text_result.setText(self.result)
 self.x = self.result
 self.y = None
 self.upOperator = None
 #如果点击的是clear,执行clear()方法
 else :
 print "你点击的是C"
 self.clear()
 print "点击按钮后:",self.x,self.operator,self.y

def clear(self):
 self.x = None
 self.y = None
 self.result = None
 self.operator = None
 self.text_result.setText(" ")

if __name__ == '__main__': 
 app = QApplication(sys.argv)
 calc = Calc()
 calc.show()
 # calc.x = '25'
 # calc.y = '2'
 # calc.operator = '*'
 # calc.calculate()
 app.exec_()

一键复制编辑原始数据按行查看历史

刘申提交于 2017年04月01日 17:28 +08:00 . 1.实现混合运算

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#coding:utf-8
import sys
from PyQt5 import uic
from PyQt5.QtWidgets import QApplication
from PyQt5.QtWidgets import QMainWindow

class Calc(QMainWindow):
 def __init__(self):
 QMainWindow.__init__(self)

 self.x = None
 self.y = None
 self.result = None
 self.operator = None
 self.equal = None
 self.upOperator = None
 # self.clear = None

 uic.loadUi('calc.ui',self)
 
 btns = [
 self.pushButton0,
 self.pushButton1,
 self.pushButton2,
 self.pushButton3,
 self.pushButton4,
 self.pushButton5,
 self.pushButton6,
 self.pushButton7,
 self.pushButton8,
 self.pushButton9,
 self.pushButton_clear,
 self.pushButton_add,
 self.pushButton_sub,
 self.pushButton_div,
 self.pushButton_mul,
 self.pushButton_dot,
 self.pushButton_equal
 ]
 map(lambda btn:btn.clicked.connect(self.click_on_button),btns)#映射
 
 def calculate(self):
 """
 如果x,y,operater不为空,计算结果。
 """
 if self.x and self.y and self.operator:
 self.result = str(eval("%s%s%s"%(self.x
 ,self.operator,self.y)))
 self.text_result.setText(self.result)

 def click_on_button(self):

 print "点击按钮前:",self.x,self.operator,self.y
 value = self.sender().text()

 #如果点击的是数字,print改数字
 if value in '0123456789.':
 print "你点的数字是:",value
 try:
 if self.operator is None:
 #如果点击的是数字的话,保存到x或追加到x
 if self.x is None:
 if value != '0':
 self.x = value 
 else:
 self.x += value
 if self.x is not None:
 self.text_result.setText(self.x)
 else:
 
 if self.y is None:
 if value != '0':
 self.y = value 
 else:
 self.y += value
 if self.y is not None:
 self.text_result.setText(self.y)
 
 except Exception ,e:
 print e
 
 #如果点击的是运算符,print改运算符
 elif value in '+-*/':
 print "你点击的运算符是:",value
 self.operator = value
 if self.upOperator is not None:
 print "上一个运算符是:",self.upOperator
 self.x = self.x + self.upOperator +self.y
 self.y = None
 # else:
 # self.x = self.x + self.upOperator + self.y
 self.upOperator = value
 # self.y = None
 self.text_result.setText(" ")


 elif value == "=":
 print "你点击的是:=",value

 self.calculate()
 self.text_result.setText(self.result)
 self.x = self.result
 self.y = None
 self.upOperator = None
 #如果点击的是clear,执行clear()方法
 else :
 print "你点击的是C"
 self.clear()
 print "点击按钮后:",self.x,self.operator,self.y

 def clear(self):
 self.x = None
 self.y = None
 self.result = None
 self.operator = None
 self.text_result.setText(" ")
 

if __name__ == '__main__': 
 app = QApplication(sys.argv)
 calc = Calc()
 calc.show()
 # calc.x = '25'
 # calc.y = '2'
 # calc.operator = '*'
 # calc.calculate()
 app.exec_()