python3.5 + PyQt5 +Eric6 實現(xiàn)的一個計算器代碼

更新時間：2017年03月11日 14:51:08 作者：北漂的雷子

這篇文章主要介紹了python3.5 + PyQt5 +Eric6 實現(xiàn)的一個計算器代碼，在windows7 32位系統(tǒng)可以完美運行計算器，有興趣的可以了解一下。

目前可以實現(xiàn)簡單的計算。計算前請重置，設(shè)計的時候默認(rèn)數(shù)字是0，學(xué)了半天就做出來個這么個結(jié)果，bug不少。 python3.5 + PyQt5 +Eric6 在windows7 32位系統(tǒng)可以完美運行計算器，簡單學(xué)了半天就畫個圖實現(xiàn)的存在bug，部分按鈕還未實現(xiàn)，后續(xù)優(yōu)化。

代碼結(jié)構(gòu)如圖：

jisuan.py

import re
#匹配整數(shù)或小數(shù)的乘除法，包括了開頭存在減號的情況
mul_div=re.compile("(-?\d+)(\.\d+)?(\*|/)(-?\d+)(\.\d+)?")
#匹配整數(shù)或小數(shù)的加減法，包括了開頭存在減號的情況
plus_minus = re.compile("(-?\d+)(\.\d+)?(-|\+)(-?\d+)(\.\d+)?")
#匹配括號
bracket=re.compile("\([^()]*\)")
#匹配乘法的時候出現(xiàn)乘以負(fù)數(shù)的情況，包括了開頭存在減號的情況
mul_minus_minus = re.compile("(-?\d+)(\.\d+)?(\*-)(\d+)(\.\d+)?")
#匹配除法的時候出現(xiàn)乘以負(fù)數(shù)的情況，包括了開頭存在減號的情況
div_minus_minus = re.compile("(-?\d+)(\.\d+)?(/-)(\d+)(\.\d+)?")
#定義一個兩位數(shù)的加減乘除法的運算，匹配左邊的右邊的數(shù)字和左邊的數(shù)字，然后進行計算
def touble_cale(str_expire):
  if str_expire.count("+") == 1:
    right_num = float(str_expire[(str_expire.find("+")+1):])
    left_num = float(str_expire[:str_expire.find("+")])
    return str(right_num+left_num)
  elif str_expire[1:].count("-") == 1:
    right_num = float(str_expire[:str_expire.find("-",1)])
    left_num = float(str_expire[(str_expire.find("-", 1) + 1):])
    return str(right_num - left_num)
  elif str_expire.count("*") == 1:
    right_num = float(str_expire[:str_expire.find("*")])
    left_num = float(str_expire[(str_expire.find("*")+1):])
    return str(right_num * left_num)
  elif str_expire.count("/") == 1:
    right_num = float(str_expire[:str_expire.find("/")])
    left_num = float(str_expire[(str_expire.find("/") + 1):])
    return str(right_num / left_num)


#定義一個方法用于判斷是否存在乘以負(fù)數(shù)和除以負(fù)數(shù)的情況
def judge_mul_minus(str_expire):
  #判斷公式中乘以負(fù)數(shù)的部分
  if len(re.findall("(\*-)", str_expire)) != 0:
    #調(diào)用上面的正則取得*-的公式
    temp_mul_minus = mul_minus_minus.search(str_expire).group()
    #將匹配的部分的*-換成*并將-放到前面
    temp_mul_minus_2 = temp_mul_minus.replace(temp_mul_minus,"-" + temp_mul_minus.replace("*-","*"))
    #經(jīng)更改的的部分與原來的部分進行替換
    str_expire=str_expire.replace(temp_mul_minus,temp_mul_minus_2)
    return judge_mul_minus(str_expire)
    #return str_expire
  # 判斷公式中除以負(fù)數(shù)的部分
  elif len(re.findall(r"(/-)", str_expire)) != 0:
    # 調(diào)用上面的正則取得/-的公式
    temp_dev_minus = div_minus_minus.search(str_expire).group()
    # 將匹配的部分的/-換成/并將-放到前面
    temp_dev_minus_2 = temp_dev_minus.replace(temp_dev_minus,"-" + temp_dev_minus.replace("/-","/"))
    # 經(jīng)更改的的部分與原來的部分進行替換
    str_expire = str_expire.replace(temp_dev_minus,temp_dev_minus_2)
    return judge_mul_minus(str_expire)
  #調(diào)用change_sign將公式中的++換成= +-換成-
  return change_sign(str_expire)

#定義一個方法取將--更改為+ +-改為-
def change_sign(str_expire):
  if len(re.findall(r"(\+-)", str_expire)) != 0:
    str_expire = str_expire.replace("+-", "-")
    return change_sign(str_expire)
  elif len(re.findall(r"(--)", str_expire)) != 0:
    str_expire = str_expire.replace("--", "+")
    return change_sign(str_expire)
  return str_expire


#定義一個方法用于計算只有加減乘除的公式，優(yōu)先處理乘法
def cale_mix(str_expire):
  #如果公式中出現(xiàn)符號數(shù)字的情況即+5 -6 *8 /8的這種情況直接放回數(shù)字否則則先計算乘除在處理加減
  while len(re.findall("[-+*/]",str_expire[1:])) != 0:
    if len(re.findall("(\*|/)",str_expire)) != 0:
      str_expire = str_expire.replace(mul_div.search(str_expire).group(),touble_cale(mul_div.search(str_expire).group()))
    elif len(re.findall("(\+|-)",str_expire)) !=0:
      str_expire = str_expire.replace(plus_minus.search(str_expire).group(),touble_cale(plus_minus.search(str_expire).group()))
  return str_expire

#定義一個方法用于去括號,并調(diào)用上述的方法進行計算
def remove_bracket(str_expire):
  #判斷公式中是否有括號
  if len(bracket.findall(str_expire)) == 0:
    return cale_mix(judge_mul_minus(str_expire))
  elif len(bracket.findall(str_expire))!=0:
    while len(bracket.findall(str_expire)) !=0:
      #print(bracket.search(str_expire).group())
      #只有存在括號優(yōu)先處理括號中的內(nèi)容并對內(nèi)容進行替換，直到?jīng)]有括號位置
      str_expire = str_expire.replace(bracket.search(str_expire).group(),cale_mix(judge_mul_minus(bracket.search(str_expire).group()[1:-1])))
    str_expire = cale_mix(judge_mul_minus(str_expire))
    return str_expire
if __name__ == "__main__":
  while True:
    user_input_expire = input("請輸入你的公式:(不要帶空格,q表示退出):")
    print("%s=%s" %(user_input_expire,remove_bracket(user_input_expire)))
    continue

untitled.py

# -*- coding: utf-8 -*-
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5 import QtCore, QtGui, QtWidgets
from Ui_untitled import Ui_Dialog
from jisuan import remove_bracket
class Dialog(QDialog, Ui_Dialog):
  def __init__(self, parent=None):
    super(Dialog, self).__init__(parent)
    self.setupUi(self)
  @pyqtSlot()
  def on_Button_6_clicked(self):
    self.Edit_xianshi.insertPlainText('6')
  @pyqtSlot()
  def on_Button_2_clicked(self):
    self.Edit_xianshi.insertPlainText('2')
  @pyqtSlot()
  def on_Button_3_clicked(self):
    self.Edit_xianshi.insertPlainText('3')
  @pyqtSlot()
  def on_Button_pingfang_clicked(self):
    me=self.Edit_xianshi.toPlainText()
    m=int(me) *int(me)
    self.Edit_xianshi.clear()
    self.Edit_xianshi.append(str(m))
  @pyqtSlot()
  def on_Button_add_clicked(self):
    h=self.Edit_xianshi.toPlainText()
    self.Edit_xianshi.clear()
    self.Edit_xianshi.append(h+'+')
  @pyqtSlot()
  def on_Button_jian_clicked(self):
    h = self.Edit_xianshi.toPlainText()
    self.Edit_xianshi.clear()
    self.Edit_xianshi.append(h + '-')
  @pyqtSlot()
  def on_Button_9_clicked(self):
    self.Edit_xianshi.insertPlainText('9')
  @pyqtSlot()
  def on_Button_chu_clicked(self):
    h = self.Edit_xianshi.toPlainText()
    self.Edit_xianshi.clear()
    self.Edit_xianshi.append(h + '/')
  @pyqtSlot()
  def on_Button_cheng_clicked(self):
    h = self.Edit_xianshi.toPlainText()
    self.Edit_xianshi.clear()
    self.Edit_xianshi.append(h + '*')
  @pyqtSlot()
  def on_Button_8_clicked(self):
    self.Edit_xianshi.insertPlainText('8')
  @pyqtSlot()
  def on_Button_4_clicked(self):
    self.Edit_xianshi.insertPlainText('4')
  @pyqtSlot()
  def on_Button_esc_clicked(self):
    self.Edit_xianshi.clear()
  @pyqtSlot()
  def on_Button_7_clicked(self):
    self.Edit_xianshi.insertPlainText('7')
  @pyqtSlot()
  def on_Button_1_clicked(self):
    self.Edit_xianshi.insertPlainText('1')
  @pyqtSlot()
  def on_Button_5_clicked(self):
    self.Edit_xianshi.insertPlainText('5')
  @pyqtSlot()
  def on_Button_xiaoshu_clicked(self):
    self.Edit_xianshi.insertPlainText('.')
  @pyqtSlot()
  def on_Button_0_clicked(self):
    self.Edit_xianshi.insertPlainText('0')
  @pyqtSlot()
  def on_Button_dengyu_clicked(self):
    pe=self.Edit_xianshi.toPlainText()
    m=remove_bracket(pe)
    self.Edit_xianshi.clear()
    self.Edit_xianshi.append(str(m))

  def on_Button_fenzhi_clicked(self):
    pe = self.Edit_xianshi.toPlainText()
    if int(pe) ==0:
      QMessageBox.information(self,u'提示',u'零不能作為分母')
      Dialog()
    else:
      m=1/(int(pe))
      self.Edit_xianshi.clear()
      self.Edit_xianshi.append(str(m))
      Dialog()
if __name__ =="__main__":
  import sys
  app = QtWidgets.QApplication(sys.argv)
  app.processEvents()
  ui = Dialog()
  ui.show()

  sys.exit(app.exec_())

Ui_untitled.py

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'C:\Users\Administrator\Desktop\pyqt5\untitled.ui'
#
# Created by: PyQt5 UI code generator 5.5
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Dialog(object):
  def setupUi(self, Dialog):
    Dialog.setObjectName("Dialog")
    Dialog.resize(357, 320)
    Dialog.setStyleSheet("font: 75 16pt \"Aharoni\";\n"
"background-color: rgb(206, 255, 251);")
    self.label = QtWidgets.QLabel(Dialog)
    self.label.setGeometry(QtCore.QRect(201, 210, 301, 21))
    self.label.setText("")
    self.label.setObjectName("label")
    self.Edit_xianshi = QtWidgets.QTextEdit(Dialog)
    self.Edit_xianshi.setGeometry(QtCore.QRect(0, 0, 351, 41))
    self.Edit_xianshi.setStyleSheet("font: 75 16pt \"Aharoni\";")
    self.Edit_xianshi.setObjectName("Edit_xianshi")
    self.gridLayoutWidget = QtWidgets.QWidget(Dialog)
    self.gridLayoutWidget.setGeometry(QtCore.QRect(0, 30, 351, 281))
    self.gridLayoutWidget.setObjectName("gridLayoutWidget")
    self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
    self.gridLayout.setObjectName("gridLayout")
    self.Button_6 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_6.setObjectName("Button_6")
    self.gridLayout.addWidget(self.Button_6, 2, 2, 1, 1)
    self.Button_2 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_2.setObjectName("Button_2")
    self.gridLayout.addWidget(self.Button_2, 3, 1, 1, 1)
    self.Button_3 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_3.setObjectName("Button_3")
    self.gridLayout.addWidget(self.Button_3, 3, 2, 1, 1)
    self.Button_fenzhi = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_fenzhi.setObjectName("Button_fenzhi")
    self.gridLayout.addWidget(self.Button_fenzhi, 1, 3, 1, 1)
    self.Button_pingfang = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_pingfang.setObjectName("Button_pingfang")
    self.gridLayout.addWidget(self.Button_pingfang, 0, 3, 1, 1)
    self.Button_add = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_add.setObjectName("Button_add")
    self.gridLayout.addWidget(self.Button_add, 2, 3, 1, 1)
    self.Button_jian = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_jian.setObjectName("Button_jian")
    self.gridLayout.addWidget(self.Button_jian, 3, 3, 1, 1)
    self.Button_9 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_9.setObjectName("Button_9")
    self.gridLayout.addWidget(self.Button_9, 1, 2, 1, 1)
    self.Button_chu = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_chu.setObjectName("Button_chu")
    self.gridLayout.addWidget(self.Button_chu, 0, 2, 1, 1)
    self.Button_cheng = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_cheng.setObjectName("Button_cheng")
    self.gridLayout.addWidget(self.Button_cheng, 0, 1, 1, 1)
    self.Button_8 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_8.setObjectName("Button_8")
    self.gridLayout.addWidget(self.Button_8, 1, 1, 1, 1)
    self.Button_4 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_4.setObjectName("Button_4")
    self.gridLayout.addWidget(self.Button_4, 2, 0, 1, 1)
    self.Button_esc = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_esc.setObjectName("Button_esc")
    self.gridLayout.addWidget(self.Button_esc, 0, 0, 1, 1)
    self.Button_7 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_7.setObjectName("Button_7")
    self.gridLayout.addWidget(self.Button_7, 1, 0, 1, 1)
    self.Button_1 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_1.setObjectName("Button_1")
    self.gridLayout.addWidget(self.Button_1, 3, 0, 1, 1)
    self.Button_5 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_5.setObjectName("Button_5")
    self.gridLayout.addWidget(self.Button_5, 2, 1, 1, 1)
    self.pushButton_17 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.pushButton_17.setText("")
    self.pushButton_17.setObjectName("pushButton_17")
    self.gridLayout.addWidget(self.pushButton_17, 4, 0, 1, 1)
    self.Button_xiaoshu = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_xiaoshu.setObjectName("Button_xiaoshu")
    self.gridLayout.addWidget(self.Button_xiaoshu, 4, 1, 1, 1)
    self.Button_0 = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_0.setStyleSheet("")
    self.Button_0.setObjectName("Button_0")
    self.gridLayout.addWidget(self.Button_0, 4, 2, 1, 1)
    self.Button_dengyu = QtWidgets.QPushButton(self.gridLayoutWidget)
    self.Button_dengyu.setObjectName("Button_dengyu")
    self.gridLayout.addWidget(self.Button_dengyu, 4, 3, 1, 1)

    self.retranslateUi(Dialog)
    QtCore.QMetaObject.connectSlotsByName(Dialog)

  def retranslateUi(self, Dialog):
    _translate = QtCore.QCoreApplication.translate
    Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
    self.Edit_xianshi.setHtml(_translate("Dialog", "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0//EN\" \"http://www.w3.org/TR/REC-html40/strict.dtd\">\n"
"<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
"p, li { white-space: pre-wrap; }\n"
"</style></head><body style=\" font-family:\'Aharoni\'; font-size:16pt; font-weight:72; font-style:normal;\">\n"
"<p style=\" margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;\"><span style=\" font-family:\'SimSun\'; font-weight:400;\">0</span></p></body></html>"))
    self.Button_6.setText(_translate("Dialog", "6"))
    self.Button_2.setText(_translate("Dialog", "2"))
    self.Button_3.setText(_translate("Dialog", "3"))
    self.Button_fenzhi.setText(_translate("Dialog", "1/^"))
    self.Button_pingfang.setText(_translate("Dialog", "^2"))
    self.Button_add.setText(_translate("Dialog", "+"))
    self.Button_jian.setText(_translate("Dialog", "-"))
    self.Button_9.setText(_translate("Dialog", "9"))
    self.Button_chu.setText(_translate("Dialog", "/"))
    self.Button_cheng.setText(_translate("Dialog", "*"))
    self.Button_8.setText(_translate("Dialog", "8"))
    self.Button_4.setText(_translate("Dialog", "4"))
    self.Button_esc.setText(_translate("Dialog", "esc"))
    self.Button_7.setText(_translate("Dialog", "7"))
    self.Button_1.setText(_translate("Dialog", "1"))
    self.Button_5.setText(_translate("Dialog", "5"))
    self.Button_xiaoshu.setText(_translate("Dialog", "."))
    self.Button_0.setText(_translate("Dialog", "0"))
    self.Button_dengyu.setText(_translate("Dialog", "="))


if __name__ == "__main__":
  import sys
  app = QtWidgets.QApplication(sys.argv)
  Dialog = QtWidgets.QDialog()
  ui = Ui_Dialog()
  ui.setupUi(Dialog)
  Dialog.show()
  sys.exit(app.exec_())

效果圖：