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‎Advance_function.py

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'''
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author : Jaydatt
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Advance function : optional parameter and keyword parameter
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'''
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print("------Optional Parameters--1-----: ")
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def add(v1=0,v2=0,v3=0):
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return (v1+v2+v3)
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print(add())
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print(add(1))
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print(add(1,2))
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print(add(1,2,3))
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print("------Optional Parameters--2-----: ")
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def fun(x = 1, y = 2, z = 3):
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return("X={} ; Y={} ; Z={}".format(x,y,z))
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print("fun() : ",fun())
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print("fun(1) : ",fun(1))
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print("fun(1,2) : ",fun(1,2))
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print("fun(1,2,3) : ",fun(1,2,3))
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print("fun(x = 10) : ",fun(x=10))
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print("fun(y = 20) : ",fun(y=20))
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print("fun(z = 30) : ",fun(z=30))
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print("fun(x = 10,y = 20) : ",fun(x=10,y = 20))
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print("fun(y = 20,z = 30) : ",fun(y=20,z = 30))
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print("fun(z = 30,x = 10) : ",fun(z = 30,x = 10))
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print("fun(x = 10,y = 20,z = 30) : ",fun(x = 10,y = 20,z = 30))
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print("fun(y = 20,x = 10,z = 30) : ",fun(y = 20,x = 10,z = 30))
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print("fun(z = 30,y = 20,x = 10) : ",fun(z = 30,y = 20,x = 10))
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print("------Optional Parameters--3-----: ")
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print(int("100"))
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print(int("100", 10)) # same thing, 10 is the default value for the base
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print(int("100", 8)) # now the base is 8, so the result is 1*64 = 64
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print("------Optional Parameters--4-----: ")
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def addList(val = "NA", lst = []):
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lst.append(val)
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return lst
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print(addList())
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print(addList(1))
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print(addList("Py"))
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print(addList(2))
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print(addList(4, []))
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print(addList(5, ["Hello"]))

‎Booleans.py

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'''
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author : Jaydatt
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Booleans
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'''
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print(True)
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print(False)
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print(type(True))
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print(type(False))

‎Condition.py

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'''
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author : Jaydatt
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In if-elif-else ladder elif and else are optional it is not mandatory.
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syntax :
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if(expression):
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statements......
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..........
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elif(expression):
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statements......
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..........
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else:
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statements......
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..........
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Expression: boolean (<,>,<=,>=,==,!=,&,|,in,is,and,or)
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'''
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op = int(input('enter value of op(0,1,-1):'))
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if(op==0):
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print("no")
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elif(op>0):
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print("yes")
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else:
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print("I am optional")
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## find given name is present or not in list
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names = ["amit", "shubham", "rohit", "rohan", "aditi", "shipra"]
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name = input("Enter the name to check\n")
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if name in names:
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print("Your name is present in the list")
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else:
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print("Your name is not present in the list")
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# if else using "is"
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c = int(input("enter 0 or 1:"))
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print(c is 0)
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if (c is 0):
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print("zero")
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else:
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print("one")
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# if else using "in"
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l1 = [45, 56, 6]
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d = int(input("enter any(45,56,6):"))
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print(d in l1)
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if (d in l1):
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print("yes")
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else:
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print("no")
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## age compare sample
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age = int(input("Enter your age: "))
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if(age>18 and age<56):
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print("You can work with us")
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else:
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print("You cannot work with us")
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if(age>34 or age<50):
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print("ok")
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else:
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print("not ok")
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## spam comment is defined as text containg keywords:"make a lot of money","buy now","click this","subscribe this"
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text = input("Enter the text\n")
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if("make a lot of money" in text):
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spam = True
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elif("buy now" in text):
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spam = True
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elif("click this" in text):
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spam = True
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elif("subscribe this" in text):
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spam = True
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else:
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spam = False
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if(spam):
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print("This text is spam")
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else:
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print("This text is not spam")
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‎Count_and_Index.py

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'''
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author : Jaydatt
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count is used to count hom many time word is used
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index is used to find index number of matching word
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count : The first method we'll talk about is called count. It requires that you provide one argument, which is what you would like to count. The method then returns the number of times that the argument occured in the string/list the method was used on. There are some differences between count for strings and count for lists. When you use count on a string, the argument can only be a string.
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index: The other method that can be helpful for both strings and lists is the index method. The index method requires one argument, and, like the count method, it takes only strings when index is used on strings, and any type when it is used on lists. For both strings and lists, index returns the leftmost index where the argument is found. If it is unable to find the argument in the string or list, then an error will occur.
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'''
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string = 'Welcome to python'
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list = ['aa','bb','cc','dd', [] ]
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tuple = (1, 2, 5, 3, 6, 4, 7, 2 ,2)
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print("string.count('x') : ", string.count('x'))
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print("list.count('jj') : ", list.count('jj'))
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print("tuple.count(11) : ", tuple.count(11))
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print("string.count('e') : ", string.count('e'))
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print("list.count('bb') : ", list.count('bb'))
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print("tuple.count(2) : ", tuple.count(2))
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print("string.index('p') : ", string.index('p'))
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print("list.index('cc') : ", list.index('cc'))
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print("list.index([]) : ", list.index([]))
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print("tuple.index(6) : ", tuple.index(6))
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# error if word not match
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# Error : print("string.index('x') : ", string.index('x'))
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# Error : print("list.index('jj') : ", list.index('jj'))
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# Error : print("tuple.index(11) : ", tuple.index(11))
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set = {'AA','BB','CC','DD'}
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# error: print(set.count('AA')) not applicable for set

‎Dictionary.py

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'''
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author : Jaydatt
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dictionary
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'''
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dic = {
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"Name": "Rahul",
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"Gender": "Male",
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"Contacts": {"Mobile": 5646845 , "Email" : "xyz@abc"},
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"Address": {"Country":"India","State":"Mumbai"},
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1: 2}
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dic["Age"] = 21 # add or modify value of key
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dic['Marks'] = "85%" # add or modify value of key
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del dic['Marks'] # delete Marks key and its value
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del dic ['Address']['State'] # delete State key and its value
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print("----------")
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for key in dic : ## or for key in list(dic.keys()) :
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print( key,": ", dic[key])
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print("----------")
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# The difference between .get(key) and [key] sytax in Dictionaries?
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# if key found then returns value of key, otherwise return None
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print("dic.get('Name') : ", dic.get('Name'))
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# if key found then returns value of key, otherwise throws error
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print("dic['Name'] : ", dic['Name'])
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print("dic['Age'] : ",dic['Age'])
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print("dic['Contacts']['Email'] : ", dic['Contacts']['Email'])
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print("----------list(dic.keys()) : \n", list(dic.keys())) # Prints the keys of the dictionary
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print("----------list(dic.values()) : \n", list(dic.values())) # Prints the values of the dictionary
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print("----------list(dic.items()) : \n", list(dic.items())) # Prints the (key, value) for all contents of the dictionary
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print("----------dic: \n",dic)
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dic_2 = {
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"Lovish": "Friend",
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"Divya": "Friend",
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"Shubham": "Friend",
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"rahul": "A Dancer"}
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# Updates the dictionary by adding key-value pairs from updateDict
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dic.update(dic_2)
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print("----------dic: \n",dic)
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'''
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we can not take list in set and error generate for example:
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s = {8,7,"Amit",[5,6]}
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we can take tupel in set but can not modify tupel for example:
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s = {8,7,"Amit",(5,6)}
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'''

‎File_1.csv

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Name, Age, Sport
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John Aalberg,31,Cross Country Skiing
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Minna Maarit Aalto,30,Sailing
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Win Valdemar Aaltonen,54,Art Competitions
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Wakako Abe,18,Cycling

‎File_1.txt

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Line-1
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Line-2
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Line-3
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Line-4
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Line-6
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Line-5
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321
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3.14

‎File_read_write_1.py

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'''
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author : Jaydatt
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file read write
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Method-1 :
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file = open(fileName, "r" or "w")
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......
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file.close()
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Method-2 (close file automatically):
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with open(fileName, "r" or "w") as f:
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......codes....
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.......
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Methods:
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filevar.write(string) : Add a string to the end of the file. filevar must refer to a file that has been opened for writing.
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filevar.writelines(List or Set or Array) : Add a string to the end of the file. filevar must refer to a file that has been opened for writing.
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filevar.read() or filevar.read(n) : Read and return a string of n characters, or the entire file as a single string if n is not provided.
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filevar.readline() or filevar.readline(n) : Read and return the next line of the file with all text up to and including the newline character
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filevar.readlines() or filevar.readlines(n) :
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Returns a list of strings
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filevar.tell() : get current position in file
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filevar.seek(int offset ,int reference) or
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filevar.seek(int offset) reference By default 0 :
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offset : +value for right and -value for left
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reference:(0,1,2) By default 0.
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0: point at the beginning of the file
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1: point at the current file position
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2: point at the end of the file
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'''
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# program to write into file
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file = open("File_1.txt", 'w')
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str1 = "Line-1\n"
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str2 = "Line-2\n"
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list = ["Line-3\n","Line-4\n"]
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set = {"Line-5\n","Line-6\n"}
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val = 321
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flt = 3.14
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file.write(str1 + str2 )
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file.writelines(list)
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file.writelines(set)
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file.write(str(val) + "\n" + str(flt))
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file.flush()
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file.close()
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# program to read from file
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file = open("File_1.txt", 'r')
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begining = file.tell() ## get current position in file
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print("begining: " , begining)
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# seek(int offset ,int reference)
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# offset : +value for right and -value for left
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# reference:(0,1,2) By default 0.
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# 0: sets the reference point at the beginning of the file
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# 1: sets the reference point at the current file position
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# 2: sets the reference point at the end of the file
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file.seek(begining) # reference by default 0.
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print("Total Characters : " , len(file.read()))
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file.seek(begining)
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print("Total Lines : " , len(file.readlines()))
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file.seek(begining)
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## read all line as String
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print("------------")
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read = file.read()
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print("type(read) : " , type(read))
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print("read : \n",read)
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file.seek(begining)
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## read only one line as String
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print("------------")
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readline = file.readline()
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print("type(readline) : " , type(readline))
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print(readline)
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readline = file.readline()
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print(readline)
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file.seek(begining)
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## read all lines as List
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print("------------")
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readlines = file.readlines()
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print("type(readlines) : " , type(readlines))
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print("readlines : ", readlines)
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## Read lines of file directly with for loop
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file.seek(begining)
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print("------------")
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for line in file:
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print(line)
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file.close()

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