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Author: sankey94

Free Prac/Class3.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Sat Sep 15 09:19:13 2018
+
+@author: student
+"""
+class Student:
+    start_stud_id = 100 #class atrribute
+    def get_fullname(self):
+        return self.firstname + " " + self.lastname
+    def __init__(self, name='NA', last='NA', phone='0'):
+        self.firstname = name
+        self.lastname = last
+        self.email = name + '.' + last + '@cdac.com'
+        self.phone = phone
+        self.stud_id = Student.start_stud_id + 1
+        Student.start_stud_id += 1
+    
+    def stud_details(self):
+        print(self.stud_id, ":", self.get_fullname())
+
+print(Student.start_stud_id)
+s1 = Student('Aakash', 'Sharma', '+91 9836467')
+
+print(Student.start_stud_id)
+s1.stud_details()
+
+s2 = Student('Mohan', 'Pandit', '+91 937356')
+print(Student.start_stud_id)
+s2.stud_details()
+s3 = Student()
+print(Student.start_stud_id)
+s4 = Student()
+print(Student.start_stud_id)

Free Prac/Class4.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Sat Sep 15 09:33:23 2018
+
+@author: student
+"""
+class Student:
+    start_stud_id = 100 #class atrribute
+    def get_fullname(self):
+        return self.firstname + " " + self.lastname
+    def __init__(self, name='NA', last='NA', phone='0'):
+        self.firstname = name
+        self.lastname = last
+        self.email = name + '.' + last + '@cdac.com'
+        self.phone = phone
+        self.stud_id = Student.start_stud_id + 1
+        Student.start_stud_id += 1
+    def stud_details(self):
+        print(self.stud_id, ":", self.get_fullname())
+    def print_start_stud_id(self):
+        print(Student.start_stud_id)
+
+print(Student.start_stud_id)
+s1 = Student('Aakash', 'Sharma', '+91 9836467')
+s1.stud_details()
+s = [Student(), Student()]
+s1.print_start_stud_id()

Free Prac/Class5.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Sat Sep 15 09:47:15 2018
+
+@author: student
+"""
+class Container():
+    start_serial_code = 'ZRMUM01'
+    container_size = '220 x 140'
+    capacity_in_tons = 1030
+    def __init__(self, serial_code):
+        self.serial_code = Container.start_serial_code + str(serial_code)
+
+    def 
+
+c1 = Container(720)
+c1.contents = 'Books'
+
+c2 = Container(721)
+c2.contents = 'Fish'
+
+c3 = Container(722)
+print(c1.serial_code, c2.serial_code, c3.serial_code)
+print(c1.contents, c2.contents)

Free Prac/args.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Tue Sep 11 12:38:28 2018
+
+@author: student
+"""
+
+def employee(city, name='Aakash', age=18):
+    print(city, '-> name =', name, 'and age =', age)
+        
+employee('Pune')
+employee('Pune', age=27)
+employee('Pune', 'Ajay')
+employee('Pune', 'Jatin', 25)
+
+
+
+def employee2(*args, **kwargs):
+    print(args)
+    print(kwargs['age'])
+
+employee2('Pune', 'Ajit', '+91 926346', age=26, profession='IT professional')
+#employee2('Pune', 27)
+#employee2('Pune')
+#employee2('Pune', 'Jatin', 25)

Free Prac/avg_sal.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Thu Sep 13 16:40:19 2018
+
+@author: student
+"""
+try:
+    with open('stud_info.csv', 'r') as stud_info:
+        salaries = []
+        for rec in stud_info:
+            salaries.append(int(rec.split(',')[3]))
+        print(sum(salaries)/len(salaries))
+except Exception as err:
+    print(err)
+
+
+try:
+    with open('stud_info.csv', 'r') as stud_info:
+        salaries = []
+        for rec in stud_info.readlines():
+            salaries.append(int(rec.split(',')[3]))
+        print(sum(salaries)/len(salaries))
+except Exception as err:
+    print(err)
+    

Free Prac/banking.py

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+import random
+
+import sys
+
+
+class Banking():
+    min_balance = 0
+
+    def __init__(self):
+        self.balance = 0
+
+    def create_account(self, acc_type='Savings'):
+        self.account_no = random.randint(100, 300)
+        self.name = input("Enter name:")
+        self.acc_type = acc_type
+
+    def getbalance(self):
+        return self.balance
+
+    def withdraw(self, amount):
+        if self.balance > amount:
+            self.balance -= amount
+        else:
+            print("Insufficient Balance")
+
+    def deposit(self, amount):
+        self.balance += amount
+
+    def display(self):
+        print("Account no    Name    Account Type    Balance")
+        print(self.account_no, self.name, self.acc_type, self.balance)
+
+
+def Display(accounts):
+    for i in accounts.values():
+        i.display()
+
+
+def main():
+    accounts = {}
+    while True:
+
+        print("1.Create Account")
+        print("2.Get Balance")
+        print("3.Withdraw")
+        print("4.Deposit")
+        print("5.Display Info")
+        ch = int(input("Enter Choice:"))
+        if ch == 1:
+            account = Banking()
+            account.create_account()
+            accounts[account.account_no] = account
+            print("Account Created Successfully")
+        elif ch == 2:
+            print(account.getbalance())
+        elif ch == 3:
+            acc=int(input("Withdraw Account:"))
+            amount = int(input("Enter Amount to be withdrawn"))
+            accounts[acc].withdraw(amount)
+        elif ch == 4:
+            acc = int(input("Withdraw Account:"))
+            amount = int(input("Enter Amount to be Added"))
+            accounts[acc].deposit(amount)
+        elif ch == 5:
+            Display(accounts)
+
+
+main()

Free Prac/closure1.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Sep 14 08:46:55 2018
+
+@author: student
+"""
+''' closure is a function which remembers the values in
+enclosing scope even if they are not in memory'''
+def outer():
+    x = 10
+    a = 8
+    b = 18
+    print(hex(id(x)), hex(id(a)))
+    def inner(y):
+        return x+y+a
+    return inner
+
+local_fun = outer()
+print(type(local_fun))
+print(local_fun(50))
+print(local_fun.__closure__)
+
+''' Closures are used as function factories.. which returns 
+new and specialised functions '''
+
+def raise_to(exp):
+    def raise_to_exp(x):
+        return pow(x,exp) 
+        #Python creates a closure to refer to exp obj
+    return raise_to_exp
+
+square = raise_to(2)
+cube = raise_to(3)
+print(square(5), cube(5))

Free Prac/closure2.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Fri Sep 14 09:15:38 2018
+
+@author: student
+"""
+def conversion_price(currency):
+    def price(qty):
+        return qty * currency
+    return price
+
+dollar_to_rupees = conversion_price(69)
+pound_to_rupees = conversion_price(90)
+
+print(dollar_to_rupees(30))
+print(pound_to_rupees(30))
+
+''' Another example of closure '''
+def make_multiplier_of(n):
+    def multiplier(x):
+        return x * n
+    return multiplier
+
+times3 = make_multiplier_of(3)
+times5 = make_multiplier_of(5)
+times6 = make_multiplier_of(6)
+
+print(times3(7))
+print(times5(7))

Free Prac/convert_int.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Thu Sep 13 14:38:23 2018
+
+@author: student
+"""
+def convert_to_int(n):
+    x = int(n)
+    return x
+
+def convert_to_float(n):
+    y = float(n)
+    return y

Free Prac/correct.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Created on Wed Sep 12 15:50:43 2018
+
+@author: student
+"""
+
+def correct(s):
+    print(s.split())
+    return ' '.join(s.split()).replace('.', '. ')
+
+s = 'python    is fun.and  it is     actually a  fun.End'
+print(correct(s))