Lab assignment 6.ipynb

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     "text": [
      "ID: 1\n",
      "Name: Samin\n",
      "Department: CSE\n",
      "Age: 21\n",
      "CGPA: 3.91\n",
      "-----------------------\n",
      "ID: 2\n",
      "Name: Fahim\n",
      "Department: ECE\n",
      "Age: 21\n",
      "CGPA: 3.85\n",
      "-----------------------\n",
      "ID: 3\n",
      "Name: Tahura\n",
      "Department: EEE\n",
      "Age: 22\n",
      "CGPA: 3.01\n",
      "-----------------------\n",
      "ID: 4\n",
      "Name: Sumaiya\n",
      "Department: BBA\n",
      "Age: 23\n",
      "CGPA: 3.96\n",
      "\n",
      "Instance variables are declared in a class and class variables are declared with the static keyword in a class \n",
      "Instance methods are the most common type of methods in Python classes and Class method can't access specific instance data.But class method can call other static methods.\n"
     ]
    }
   ],
   "source": [
    "#1\n",
    "class Student:\n",
    "    id = 0\n",
    "    def __init__(self,name,department,age,cgpa):\n",
    "        self.name = name\n",
    "        self.department = department\n",
    "        self.age = age\n",
    "        self.cgpa = cgpa\n",
    "        Student.id+=1\n",
    "        \n",
    "    def get_details(self):\n",
    "        print(\"ID:\",Student.id)\n",
    "        print(\"Name:\",self.name)\n",
    "        print(\"Department:\",self.department)\n",
    "        print(\"Age:\",self.age)\n",
    "        print(\"CGPA:\",self.cgpa)\n",
    "    @classmethod\n",
    "    def from_String(cls,info):\n",
    "        name,department,age,cgpa = info.split(\"-\")\n",
    "        obj = cls(name,department,age,cgpa) \n",
    "        return obj\n",
    "\n",
    "s1 = Student(\"Samin\", \"CSE\", 21, 3.91)\n",
    "s1.get_details()\n",
    "print(\"-----------------------\")\n",
    "s2 = Student(\"Fahim\", \"ECE\", 21, 3.85)\n",
    "s2.get_details()\n",
    "print(\"-----------------------\")\n",
    "s3 = Student(\"Tahura\", \"EEE\", 22, 3.01)\n",
    "s3.get_details()\n",
    "print(\"-----------------------\")\n",
    "s4 = Student.from_String(\"Sumaiya-BBA-23-3.96\")\n",
    "s4.get_details() \n",
    "print()\n",
    "\n",
    "\n",
    "print(\"Instance variables are declared in a class and class variables are declared with the static keyword in a class \")\n",
    "print(\"Instance methods are the most common type of methods in Python classes and Class method can't access specific instance data.But class method can call other static methods.\")"
   ]
  },
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   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Equal\n",
      "As we replace '/' to '-' in toDashDate class method, in the method both statements became same thats why conditional statement it prints Equal.\n"
     ]
    }
   ],
   "source": [
    "#2\n",
    "class Dates:\n",
    "    def __init__(self,date):\n",
    "        self.date = date\n",
    "    @classmethod\n",
    "    def toDashDate(cls,dates):\n",
    "        day,month,year = dates.split('/')\n",
    "        dates = day + \"-\" + month + \"-\" + year\n",
    "        date = cls(dates)\n",
    "        return date\n",
    "    def getDate(self):\n",
    "        return self.date\n",
    "\n",
    "\n",
    "date1 = Dates(\"05-09-2020\")\n",
    "dateFromDB = \"05/09/2020\"\n",
    "date2= Dates.toDashDate(dateFromDB)\n",
    "if(date1.getDate() == date2.getDate()):\n",
    " print(\"Equal\")\n",
    "else:\n",
    " print(\"Unequal\")\n",
    "\n",
    "print(\"As we replace '/' to '-' in toDashDate class method, in the method both statements became same thats why conditional statement it prints Equal.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Total Passenger: 0\n",
      "=========================\n",
      "Name: Jack\n",
      "Bus fare:550\n",
      "=========================\n",
      "Name: Carol\n",
      "Bus fare:450\n",
      "=========================\n",
      "Name: Mike\n",
      "Bus fare:500\n",
      "=========================\n",
      "Total Passenger: 3\n"
     ]
    }
   ],
   "source": [
    "#3 \n",
    "class Passenger:\n",
    "    count = 0\n",
    "    base_fare = 450\n",
    "\n",
    "    def __init__(self, name, fare=0):\n",
    "        self.name = name\n",
    "        self.fare = fare\n",
    "        Passenger.count += 1\n",
    "\n",
    "    def set_bag_weight(self, weight):\n",
    "        self.weight = weight\n",
    "\n",
    "    def printDetail(self):\n",
    "        print(\"Name:\", self.name)\n",
    "        if 20 < self.weight <= 50:\n",
    "            self.fare = Passenger.base_fare + 50\n",
    "            print(\"Bus fare:{}\".format(self.fare))\n",
    "        elif self.weight > 50:\n",
    "            self.fare = Passenger.base_fare + 100\n",
    "            print(\"Bus fare:{}\".format(self.fare))\n",
    "        else:\n",
    "            self.fare = Passenger.base_fare\n",
    "            print(\"Bus fare:{}\".format(self.fare))\n",
    "\n",
    "\n",
    "print(\"Total Passenger:\", Passenger.count)\n",
    "p1 = Passenger(\"Jack\")\n",
    "p1.set_bag_weight(90)\n",
    "p2 = Passenger(\"Carol\")\n",
    "p2.set_bag_weight(10)\n",
    "p3 = Passenger(\"Mike\")\n",
    "p3.set_bag_weight(25)\n",
    "print(\"=========================\")\n",
    "p1.printDetail()\n",
    "print(\"=========================\")\n",
    "p2.printDetail()\n",
    "print(\"=========================\")\n",
    "p3.printDetail()\n",
    "print(\"=========================\")\n",
    "print(\"Total Passenger:\", Passenger.count)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "No. of Traveller = 0\n",
      "=======================\n",
      "Source: Dhaka\n",
      "Destinaton: India\n",
      "Flight Time:1:00\n",
      "=======================\n",
      "Source: Kuala Lampur\n",
      "Destinaton: Dhaka\n",
      "Flight Time:23:00\n",
      "=======================\n",
      "Source: Dhaka\n",
      "Destinaton: Germany\n",
      "Flight Time:15:00\n",
      "=======================\n",
      "Source: Malaysia\n",
      "Destinaton: Canada\n",
      "Flight Time:9:00\n",
      "=======================\n",
      "No. of Traveller = 4\n"
     ]
    }
   ],
   "source": [
    "#4\n",
    "class Travel:\n",
    "    count = 0\n",
    "    def __init__(self,source,desti,time = 1):\n",
    "        self.source = source\n",
    "        self.desti = desti\n",
    "        self.time = time\n",
    "        Travel.count += 1\n",
    "    def set_time(self,time):\n",
    "        self.time = time\n",
    "    def set_source(self, source):\n",
    "        self.source = source\n",
    "    def set_destination(self,desti):\n",
    "        self.desti = desti\n",
    "    def display_travel_info(self):\n",
    "        self.time = str(self.time)\n",
    "        print(\"Source:\",self.source)\n",
    "        print(\"Destinaton:\",self.desti)\n",
    "        self.time = self.time+\":\"+\"00\"\n",
    "        return \"Flight Time:{}\".format(self.time)\n",
    "\n",
    "\n",
    "print(\"No. of Traveller =\", Travel.count)\n",
    "print(\"=======================\")\n",
    "t1 = Travel(\"Dhaka\",\"India\")\n",
    "print(t1.display_travel_info())\n",
    "print(\"=======================\")\n",
    "t2 = Travel(\"Kuala Lampur\",\"Dhaka\")\n",
    "t2.set_time(23)\n",
    "print(t2.display_travel_info())\n",
    "print(\"=======================\")\n",
    "t3 = Travel(\"Dhaka\",\"New_Zealand\")\n",
    "t3.set_time(15)\n",
    "t3.set_destination(\"Germany\")\n",
    "print(t3.display_travel_info())\n",
    "print(\"=======================\")\n",
    "t4 = Travel(\"Dhaka\",\"India\")\n",
    "t4.set_time(9)\n",
    "t4.set_source(\"Malaysia\")\n",
    "t4.set_destination(\"Canada\")\n",
    "print(t4.display_travel_info())\n",
    "print(\"=======================\")\n",
    "print(\"No. of Traveller =\", Travel.count)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Apple 3\n",
      "Pear 4\n",
      "Total number of fruits 7\n",
      "Fruits are good for health\n",
      "Total number of fruits 0\n"
     ]
    }
   ],
   "source": [
    "#5\n",
    "class Fruit:\n",
    "    fruitCount = 0\n",
    "    def __init__(self,name,count):\n",
    "        self.name = name\n",
    "        self.count = count\n",
    "        Fruit.fruitCount+=self.count\n",
    "    @staticmethod\n",
    "    def saySomethingGood():\n",
    "        print(\"Fruits are good for health\")\n",
    "    @classmethod\n",
    "    def resetcount(cls):\n",
    "        Fruit.fruitCount = 0\n",
    "        return Fruit.fruitCount\n",
    "        \n",
    "\n",
    "apples = Fruit(\"Apple\", 3);\n",
    "pears = Fruit(\"Pear\", 4);\n",
    "print(apples.name, apples.count)\n",
    "print(pears.name,pears.count)\n",
    "print(\"Total number of fruits\", Fruit.fruitCount)\n",
    "Fruit.saySomethingGood()\n",
    "Fruit.resetcount()\n",
    "print(\"Total number of fruits\", Fruit.fruitCount)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Total number of cats: 0\n",
      "=======================\n",
      "White cat is sitting\n",
      "Black cat is sitting\n",
      "Brown cat is jumping\n",
      "Red cat is purring\n",
      "White cat is playing\n",
      "Blue cat is sitting\n",
      "Purple cat is jumping\n",
      "=======================\n",
      "Total number of cats: 5\n"
     ]
    }
   ],
   "source": [
    "#6\n",
    "class Cat:\n",
    "    Number_of_cats = 0\n",
    "\n",
    "    def __init__(self, color, doing):\n",
    "        self.color = color\n",
    "\n",
    "        self.doing = doing\n",
    "        Cat.Number_of_cats += 1\n",
    "\n",
    "    @classmethod\n",
    "    def no_parameter(cls):\n",
    "        color = \"White\"\n",
    "        doing = \"sitting\"\n",
    "        return cls(color, doing)\n",
    "\n",
    "    @classmethod\n",
    "    def first_parameter(cls, color):\n",
    "        cls.color = color\n",
    "        doing = \"sitting\"\n",
    "        return cls(color, doing)\n",
    "\n",
    "    @classmethod\n",
    "    def second_parameter(cls, doing):\n",
    "        color = \"White\"\n",
    "        cls.doing = doing\n",
    "        return cls(color, doing)\n",
    "\n",
    "    def changeColor(self, color):\n",
    "        self.color = color\n",
    "\n",
    "    def printCat(self):\n",
    "        print(\"{} cat is {}\".format(self.color, self.doing))\n",
    "\n",
    "\n",
    "print(\"Total number of cats:\", Cat.Number_of_cats)\n",
    "c1 = Cat.no_parameter()\n",
    "c2 = Cat.first_parameter(\"Black\")\n",
    "c3 = Cat(\"Brown\", \"jumping\")\n",
    "c4 = Cat(\"Red\", \"purring\")\n",
    "c5 = Cat.second_parameter(\"playing\")\n",
    "print(\"=======================\")\n",
    "c1.printCat()\n",
    "c2.printCat()\n",
    "c3.printCat()\n",
    "c4.printCat()\n",
    "c5.printCat()\n",
    "c1.changeColor(\"Blue\")\n",
    "c3.changeColor(\"Purple\")\n",
    "c1.printCat()\n",
    "c3.printCat()\n",
    "print(\"=======================\")\n",
    "print(\"Total number of cats:\", Cat.Number_of_cats)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Default radius= 5 Default height= 18\n",
      "Updated radius= 0 Updated height= 0\n",
      "Area: 0.0\n",
      "Volume: 0.0\n",
      "===============================\n",
      "Default radius= 0 Default height= 0\n",
      "Updated radius= 3 Updated height= 8\n",
      "Area: 207.34511513692635\n",
      "Volume: 226.1946710584651\n",
      "===============================\n",
      "Default radius= 3 Default height= 8\n",
      "Updated radius= 7.0 Updated height= 13.0\n",
      "Area: 879.645943005142\n",
      "Volume: 2001.1945203366981\n",
      "===============================\n",
      "Default radius= 7.0 Default height= 13.0\n",
      "Updated radius= 0.3 Updated height= 5.56\n",
      "Area: 11.045839770021713\n",
      "===============================\n",
      "Default radius= 0.3 Default height= 5.56\n",
      "Updated radius= 3 Updated height= 5\n",
      "Volume: 141.3716694115407\n"
     ]
    }
   ],
   "source": [
    "#7\n",
    "import math\n",
    "\n",
    "\n",
    "class Cylinder:\n",
    "    radius = 5\n",
    "    height = 18\n",
    "\n",
    "    def __init__(self, radius, height):\n",
    "        self.radius = radius\n",
    "        self.height = height\n",
    "        print(\"Default radius=\", Cylinder.radius, \"Default height=\", Cylinder.height)\n",
    "        Cylinder.radius = self.radius\n",
    "        Cylinder.height = self.height\n",
    "        print(\"Updated radius=\", Cylinder.radius, \"Updated height=\", Cylinder.height)\n",
    "\n",
    "    @classmethod\n",
    "    def swap(cls, radius, height):\n",
    "        return (cls(height, radius))\n",
    "\n",
    "    @classmethod\n",
    "    def changeFormat(cls, detail):\n",
    "        radius, height = detail.split(\"-\")\n",
    "        radius = float(radius)\n",
    "        height = float(height)\n",
    "        return (cls(radius, height))\n",
    "\n",
    "    @staticmethod\n",
    "    def area(radius, height):\n",
    "        area = (2 * math.pi * radius ** 2 + 2 * math.pi * radius * height)\n",
    "        print(\"Area:\", area)\n",
    "\n",
    "    @staticmethod\n",
    "    def volume(radius, height):\n",
    "        volume = (math.pi * radius ** 2 * height)\n",
    "        print(\"Volume:\", volume)\n",
    "\n",
    "\n",
    "c1 = Cylinder(0, 0)\n",
    "Cylinder.area(c1.radius, c1.height)\n",
    "Cylinder.volume(c1.radius, c1.height)\n",
    "print(\"===============================\")\n",
    "c2 = Cylinder.swap(8, 3)\n",
    "c2.area(c2.radius, c2.height)\n",
    "c2.volume(c2.radius, c2.height)\n",
    "print(\"===============================\")\n",
    "c3 = Cylinder.changeFormat(\"7-13\")\n",
    "c3.area(c3.radius, c3.height)\n",
    "c3.volume(c3.radius, c3.height)\n",
    "print(\"===============================\")\n",
    "Cylinder(0.3, 5.56).area(Cylinder.radius, Cylinder.height)\n",
    "print(\"===============================\")\n",
    "Cylinder(3, 5).volume(Cylinder.radius, Cylinder.height)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
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