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python通过PyQt5和Eric6制作简单计算器

时间:2021-07-01 10:21:17 帮助过:27人阅读

这篇文章主要介绍了python3.5 + PyQt5 +Eric6 实现的一个计算器代码,在windows7 32位系统可以完美运行 计算器,有兴趣的可以了解一下。

目前可以实现简单的计算。计算前请重置,设计的时候默认数字是0,学了半天就做出来个这么个结果,bug不少。 python3.5 + PyQt5 +Eric6 在windows7 32位系统可以完美运行 计算器,简单学了半天就画个图实现的存在bug,部分按钮还未实现,后续优化。

代码结构如图:

jisuan.py


  1. import re
  2. #匹配整数或小数的乘除法,包括了开头存在减号的情况
  3. mul_p=re.compile("(-?\d+)(\.\d+)?(\*|/)(-?\d+)(\.\d+)?")
  4. #匹配整数或小数的加减法,包括了开头存在减号的情况
  5. plus_minus = re.compile("(-?\d+)(\.\d+)?(-|\+)(-?\d+)(\.\d+)?")
  6. #匹配括号
  7. bracket=re.compile("\([^()]*\)")
  8. #匹配乘法的时候出现乘以负数的情况,包括了开头存在减号的情况
  9. mul_minus_minus = re.compile("(-?\d+)(\.\d+)?(\*-)(\d+)(\.\d+)?")
  10. #匹配除法的时候出现乘以负数的情况,包括了开头存在减号的情况
  11. p_minus_minus = re.compile("(-?\d+)(\.\d+)?(/-)(\d+)(\.\d+)?")
  12. #定义一个两位数的加减乘除法的运算,匹配左边的右边的数字和左边的数字,然后进行计算
  13. def touble_cale(str_expire):
  14. if str_expire.count("+") == 1:
  15. right_num = float(str_expire[(str_expire.find("+")+1):])
  16. left_num = float(str_expire[:str_expire.find("+")])
  17. return str(right_num+left_num)
  18. elif str_expire[1:].count("-") == 1:
  19. right_num = float(str_expire[:str_expire.find("-",1)])
  20. left_num = float(str_expire[(str_expire.find("-", 1) + 1):])
  21. return str(right_num - left_num)
  22. elif str_expire.count("*") == 1:
  23. right_num = float(str_expire[:str_expire.find("*")])
  24. left_num = float(str_expire[(str_expire.find("*")+1):])
  25. return str(right_num * left_num)
  26. elif str_expire.count("/") == 1:
  27. right_num = float(str_expire[:str_expire.find("/")])
  28. left_num = float(str_expire[(str_expire.find("/") + 1):])
  29. return str(right_num / left_num)
  30. #定义一个方法用于判断是否存在乘以负数和除以负数的情况
  31. def judge_mul_minus(str_expire):
  32. #判断公式中乘以负数的部分
  33. if len(re.findall("(\*-)", str_expire)) != 0:
  34. #调用上面的正则取得*-的公式
  35. temp_mul_minus = mul_minus_minus.search(str_expire).group()
  36. #将匹配的部分的*-换成*并将-放到前面
  37. temp_mul_minus_2 = temp_mul_minus.replace(temp_mul_minus,"-" + temp_mul_minus.replace("*-","*"))
  38. #经更改的的部分与原来的部分进行替换
  39. str_expire=str_expire.replace(temp_mul_minus,temp_mul_minus_2)
  40. return judge_mul_minus(str_expire)
  41. #return str_expire
  42. # 判断公式中除以负数的部分
  43. elif len(re.findall(r"(/-)", str_expire)) != 0:
  44. # 调用上面的正则取得/-的公式
  45. temp_dev_minus = p_minus_minus.search(str_expire).group()
  46. # 将匹配的部分的/-换成/并将-放到前面
  47. temp_dev_minus_2 = temp_dev_minus.replace(temp_dev_minus,"-" + temp_dev_minus.replace("/-","/"))
  48. # 经更改的的部分与原来的部分进行替换
  49. str_expire = str_expire.replace(temp_dev_minus,temp_dev_minus_2)
  50. return judge_mul_minus(str_expire)
  51. #调用change_sign将公式中的++换成= +-换成-
  52. return change_sign(str_expire)
  53. #定义一个方法取将--更改为+ +-改为-
  54. def change_sign(str_expire):
  55. if len(re.findall(r"(\+-)", str_expire)) != 0:
  56. str_expire = str_expire.replace("+-", "-")
  57. return change_sign(str_expire)
  58. elif len(re.findall(r"(--)", str_expire)) != 0:
  59. str_expire = str_expire.replace("--", "+")
  60. return change_sign(str_expire)
  61. return str_expire
  62. #定义一个方法用于计算只有加减乘除的公式,优先处理乘法
  63. def cale_mix(str_expire):
  64. #如果公式中出现符号数字的情况即+5 -6 *8 /8的这种情况直接放回数字否则则先计算乘除在处理加减
  65. while len(re.findall("[-+*/]",str_expire[1:])) != 0:
  66. if len(re.findall("(\*|/)",str_expire)) != 0:
  67. str_expire = str_expire.replace(mul_p.search(str_expire).group(),touble_cale(mul_p.search(str_expire).group()))
  68. elif len(re.findall("(\+|-)",str_expire)) !=0:
  69. str_expire = str_expire.replace(plus_minus.search(str_expire).group(),touble_cale(plus_minus.search(str_expire).group()))
  70. return str_expire
  71. #定义一个方法用于去括号,并调用上述的方法进行计算
  72. def remove_bracket(str_expire):
  73. #判断公式中是否有括号
  74. if len(bracket.findall(str_expire)) == 0:
  75. return cale_mix(judge_mul_minus(str_expire))
  76. elif len(bracket.findall(str_expire))!=0:
  77. while len(bracket.findall(str_expire)) !=0:
  78. #print(bracket.search(str_expire).group())
  79. #只有存在括号优先处理括号中的内容并对内容进行替换,直到没有括号位置
  80. str_expire = str_expire.replace(bracket.search(str_expire).group(),cale_mix(judge_mul_minus(bracket.search(str_expire).group()[1:-1])))
  81. str_expire = cale_mix(judge_mul_minus(str_expire))
  82. return str_expire
  83. if name == "main":
  84. while True:
  85. user_input_expire = input("请输入你的公式:(不要带空格,q表示退出):")
  86. print("%s=%s" %(user_input_expire,remove_bracket(user_input_expire)))
  87. continue

untitled.py

  1. # -*- coding: utf-8 -*-
  2. from PyQt5.QtCore import *
  3. from PyQt5.QtWidgets import *
  4. from PyQt5 import QtCore, QtGui, QtWidgets
  5. from Ui_untitled import Ui_Dialog
  6. from jisuan import remove_bracket
  7. class Dialog(QDialog, Ui_Dialog):
  8. def init(self, parent=None):
  9. super(Dialog, self).init(parent)
  10. self.setupUi(self)
  11. @pyqtSlot()
  12. def on_Button_6_clicked(self):
  13. self.Edit_xianshi.insertPlainText('6')
  14. @pyqtSlot()
  15. def on_Button_2_clicked(self):
  16. self.Edit_xianshi.insertPlainText('2')
  17. @pyqtSlot()
  18. def on_Button_3_clicked(self):
  19. self.Edit_xianshi.insertPlainText('3')
  20. @pyqtSlot()
  21. def on_Button_pingfang_clicked(self):
  22. me=self.Edit_xianshi.toPlainText()
  23. m=int(me) *int(me)
  24. self.Edit_xianshi.clear()
  25. self.Edit_xianshi.append(str(m))
  26. @pyqtSlot()
  27. def on_Button_add_clicked(self):
  28. h=self.Edit_xianshi.toPlainText()
  29. self.Edit_xianshi.clear()
  30. self.Edit_xianshi.append(h+'+')
  31. @pyqtSlot()
  32. def on_Button_jian_clicked(self):
  33. h = self.Edit_xianshi.toPlainText()
  34. self.Edit_xianshi.clear()
  35. self.Edit_xianshi.append(h + '-')
  36. @pyqtSlot()
  37. def on_Button_9_clicked(self):
  38. self.Edit_xianshi.insertPlainText('9')
  39. @pyqtSlot()
  40. def on_Button_chu_clicked(self):
  41. h = self.Edit_xianshi.toPlainText()
  42. self.Edit_xianshi.clear()
  43. self.Edit_xianshi.append(h + '/')
  44. @pyqtSlot()
  45. def on_Button_cheng_clicked(self):
  46. h = self.Edit_xianshi.toPlainText()
  47. self.Edit_xianshi.clear()
  48. self.Edit_xianshi.append(h + '*')
  49. @pyqtSlot()
  50. def on_Button_8_clicked(self):
  51. self.Edit_xianshi.insertPlainText('8')
  52. @pyqtSlot()
  53. def on_Button_4_clicked(self):
  54. self.Edit_xianshi.insertPlainText('4')
  55. @pyqtSlot()
  56. def on_Button_esc_clicked(self):
  57. self.Edit_xianshi.clear()
  58. @pyqtSlot()
  59. def on_Button_7_clicked(self):
  60. self.Edit_xianshi.insertPlainText('7')
  61. @pyqtSlot()
  62. def on_Button_1_clicked(self):
  63. self.Edit_xianshi.insertPlainText('1')
  64. @pyqtSlot()
  65. def on_Button_5_clicked(self):
  66. self.Edit_xianshi.insertPlainText('5')
  67. @pyqtSlot()
  68. def on_Button_xiaoshu_clicked(self):
  69. self.Edit_xianshi.insertPlainText('.')
  70. @pyqtSlot()
  71. def on_Button_0_clicked(self):
  72. self.Edit_xianshi.insertPlainText('0')
  73. @pyqtSlot()
  74. def on_Button_dengyu_clicked(self):
  75. pe=self.Edit_xianshi.toPlainText()
  76. m=remove_bracket(pe)
  77. self.Edit_xianshi.clear()
  78. self.Edit_xianshi.append(str(m))
  79. def on_Button_fenzhi_clicked(self):
  80. pe = self.Edit_xianshi.toPlainText()
  81. if int(pe) ==0:
  82. QMessageBox.information(self,u'提示',u'零不能作为分母')
  83. Dialog()
  84. else:
  85. m=1/(int(pe))
  86. self.Edit_xianshi.clear()
  87. self.Edit_xianshi.append(str(m))
  88. Dialog()
  89. if name =="main":
  90. import sys
  91. app = QtWidgets.QApplication(sys.argv)
  92. app.processEvents()
  93. ui = Dialog()
  94. ui.show()
  95. sys.exit(app.exec_())

Ui_untitled.py

  1. # -*- coding: utf-8 -*-
  2. # Form implementation generated from reading ui file 'C:\Users\Administrator\Desktop\pyqt5\untitled.ui'
  3. #
  4. # Created by: PyQt5 UI code generator 5.5
  5. #
  6. # WARNING! All changes made in this file will be lost!
  7. from PyQt5 import QtCore, QtGui, QtWidgets
  8. class Ui_Dialog(object):
  9. def setupUi(self, Dialog):
  10. Dialog.setObjectName("Dialog")
  11. Dialog.resize(357, 320)
  12. Dialog.setStyleSheet("font: 75 16pt \"Aharoni\";\n"
  13. "background-color: rgb(206, 255, 251);")
  14. self.label = QtWidgets.QLabel(Dialog)
  15. self.label.setGeometry(QtCore.QRect(201, 210, 301, 21))
  16. self.label.setText("")
  17. self.label.setObjectName("label")
  18. self.Edit_xianshi = QtWidgets.QTextEdit(Dialog)
  19. self.Edit_xianshi.setGeometry(QtCore.QRect(0, 0, 351, 41))
  20. self.Edit_xianshi.setStyleSheet("font: 75 16pt \"Aharoni\";")
  21. self.Edit_xianshi.setObjectName("Edit_xianshi")
  22. self.gridLayoutWidget = QtWidgets.QWidget(Dialog)
  23. self.gridLayoutWidget.setGeometry(QtCore.QRect(0, 30, 351, 281))
  24. self.gridLayoutWidget.setObjectName("gridLayoutWidget")
  25. self.gridLayout = QtWidgets.QGridLayout(self.gridLayoutWidget)
  26. self.gridLayout.setObjectName("gridLayout")
  27. self.Button_6 = QtWidgets.QPushButton(self.gridLayoutWidget)
  28. self.Button_6.setObjectName("Button_6")
  29. self.gridLayout.addWidget(self.Button_6, 2, 2, 1, 1)
  30. self.Button_2 = QtWidgets.QPushButton(self.gridLayoutWidget)
  31. self.Button_2.setObjectName("Button_2")
  32. self.gridLayout.addWidget(self.Button_2, 3, 1, 1, 1)
  33. self.Button_3 = QtWidgets.QPushButton(self.gridLayoutWidget)
  34. self.Button_3.setObjectName("Button_3")
  35. self.gridLayout.addWidget(self.Button_3, 3, 2, 1, 1)
  36. self.Button_fenzhi = QtWidgets.QPushButton(self.gridLayoutWidget)
  37. self.Button_fenzhi.setObjectName("Button_fenzhi")
  38. self.gridLayout.addWidget(self.Button_fenzhi, 1, 3, 1, 1)
  39. self.Button_pingfang = QtWidgets.QPushButton(self.gridLayoutWidget)
  40. self.Button_pingfang.setObjectName("Button_pingfang")
  41. self.gridLayout.addWidget(self.Button_pingfang, 0, 3, 1, 1)
  42. self.Button_add = QtWidgets.QPushButton(self.gridLayoutWidget)
  43. self.Button_add.setObjectName("Button_add")
  44. self.gridLayout.addWidget(self.Button_add, 2, 3, 1, 1)
  45. self.Button_jian = QtWidgets.QPushButton(self.gridLayoutWidget)
  46. self.Button_jian.setObjectName("Button_jian")
  47. self.gridLayout.addWidget(self.Button_jian, 3, 3, 1, 1)
  48. self.Button_9 = QtWidgets.QPushButton(self.gridLayoutWidget)
  49. self.Button_9.setObjectName("Button_9")
  50. self.gridLayout.addWidget(self.Button_9, 1, 2, 1, 1)
  51. self.Button_chu = QtWidgets.QPushButton(self.gridLayoutWidget)
  52. self.Button_chu.setObjectName("Button_chu")
  53. self.gridLayout.addWidget(self.Button_chu, 0, 2, 1, 1)
  54. self.Button_cheng = QtWidgets.QPushButton(self.gridLayoutWidget)
  55. self.Button_cheng.setObjectName("Button_cheng")
  56. self.gridLayout.addWidget(self.Button_cheng, 0, 1, 1, 1)
  57. self.Button_8 = QtWidgets.QPushButton(self.gridLayoutWidget)
  58. self.Button_8.setObjectName("Button_8")
  59. self.gridLayout.addWidget(self.Button_8, 1, 1, 1, 1)
  60. self.Button_4 = QtWidgets.QPushButton(self.gridLayoutWidget)
  61. self.Button_4.setObjectName("Button_4")
  62. self.gridLayout.addWidget(self.Button_4, 2, 0, 1, 1)
  63. self.Button_esc = QtWidgets.QPushButton(self.gridLayoutWidget)
  64. self.Button_esc.setObjectName("Button_esc")
  65. self.gridLayout.addWidget(self.Button_esc, 0, 0, 1, 1)
  66. self.Button_7 = QtWidgets.QPushButton(self.gridLayoutWidget)
  67. self.Button_7.setObjectName("Button_7")
  68. self.gridLayout.addWidget(self.Button_7, 1, 0, 1, 1)
  69. self.Button_1 = QtWidgets.QPushButton(self.gridLayoutWidget)
  70. self.Button_1.setObjectName("Button_1")
  71. self.gridLayout.addWidget(self.Button_1, 3, 0, 1, 1)
  72. self.Button_5 = QtWidgets.QPushButton(self.gridLayoutWidget)
  73. self.Button_5.setObjectName("Button_5")
  74. self.gridLayout.addWidget(self.Button_5, 2, 1, 1, 1)
  75. self.pushButton_17 = QtWidgets.QPushButton(self.gridLayoutWidget)
  76. self.pushButton_17.setText("")
  77. self.pushButton_17.setObjectName("pushButton_17")
  78. self.gridLayout.addWidget(self.pushButton_17, 4, 0, 1, 1)
  79. self.Button_xiaoshu = QtWidgets.QPushButton(self.gridLayoutWidget)
  80. self.Button_xiaoshu.setObjectName("Button_xiaoshu")
  81. self.gridLayout.addWidget(self.Button_xiaoshu, 4, 1, 1, 1)
  82. self.Button_0 = QtWidgets.QPushButton(self.gridLayoutWidget)
  83. self.Button_0.setStyleSheet("")
  84. self.Button_0.setObjectName("Button_0")
  85. self.gridLayout.addWidget(self.Button_0, 4, 2, 1, 1)
  86. self.Button_dengyu = QtWidgets.QPushButton(self.gridLayoutWidget)
  87. self.Button_dengyu.setObjectName("Button_dengyu")
  88. self.gridLayout.addWidget(self.Button_dengyu, 4, 3, 1, 1)
  89. self.retranslateUi(Dialog)
  90. QtCore.QMetaObject.connectSlotsByName(Dialog)
  91. def retranslateUi(self, Dialog):
  92. _translate = QtCore.QCoreApplication.translate
  93. Dialog.setWindowTitle(_translate("Dialog", "Dialog"))
  94. 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"
  95. "<html><head><meta name=\"qrichtext\" content=\"1\" /><style type=\"text/css\">\n"
  96. "p, li { white-space: pre-wrap; }\n"
  97. "</style></head><body style=\" font-family:\'Aharoni\'; font-size:16pt; font-weight:72; font-style:normal;\">\n"
  98. "<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>"))
  99. self.Button_6.setText(_translate("Dialog", "6"))
  100. self.Button_2.setText(_translate("Dialog", "2"))
  101. self.Button_3.setText(_translate("Dialog", "3"))
  102. self.Button_fenzhi.setText(_translate("Dialog", "1/^"))
  103. self.Button_pingfang.setText(_translate("Dialog", "^2"))
  104. self.Button_add.setText(_translate("Dialog", "+"))
  105. self.Button_jian.setText(_translate("Dialog", "-"))
  106. self.Button_9.setText(_translate("Dialog", "9"))
  107. self.Button_chu.setText(_translate("Dialog", "/"))
  108. self.Button_cheng.setText(_translate("Dialog", "*"))
  109. self.Button_8.setText(_translate("Dialog", "8"))
  110. self.Button_4.setText(_translate("Dialog", "4"))
  111. self.Button_esc.setText(_translate("Dialog", "esc"))
  112. self.Button_7.setText(_translate("Dialog", "7"))
  113. self.Button_1.setText(_translate("Dialog", "1"))
  114. self.Button_5.setText(_translate("Dialog", "5"))
  115. self.Button_xiaoshu.setText(_translate("Dialog", "."))
  116. self.Button_0.setText(_translate("Dialog", "0"))
  117. self.Button_dengyu.setText(_translate("Dialog", "="))
  118. if name == "main":
  119. import sys
  120. app = QtWidgets.QApplication(sys.argv)
  121. Dialog = QtWidgets.QDialog()
  122. ui = Ui_Dialog()
  123. ui.setupUi(Dialog)
  124. Dialog.show()
  125. sys.exit(app.exec_())

效果图:

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