Python Tuples - Day 5(posted next day)

Tuples are immutable objects,meaning they cannot be changed/altered ,they can only be assigned

  
# tuplevar1 = ("a","b","c")
# tuplevar2 = "a","b","c"
# print(tuplevar1)
# print(tuplevar2)
# print(("a","b","c"))
# print("a","b","c")
#
# #tuples are immutable objects,meaning they cannot be changed/altered ,
#they can only be assigned
# welcome = "hi","hello",2018
# print(welcome)
# print(welcome[0])
# #the below line of code will give an error ,since we are trying to alter the tuple
# # welcome[0]="hii"
# print(welcome)
#
# tupvar1 = "hi","ji"
# print(tupvar1)
# tupvar2 = welcome[1],tupvar1[0],2019
# print(tupvar2)
#
# #where as the list object can be altered like below
# listvar1 = ["hi","hello",2020]
# print(listvar1)
# listvar1[0]="Hii"
# print(listvar1)

#right side expression is evaluated first
# a , b = 1,2
# print(a,b)
# c=d=e=f=2
# print(c,d,e)
# a,b =b,a
# print(a,b)
#
# albumtuplevar1 = "muthu","rahman",2000
# print(albumtuplevar1)
# title,composer,year =albumtuplevar1
# print(title)
# print(composer)
# print(year)
#the below piece of code will throw an error like ValueError: not enough values 
#to unpack (expected 4, got 3)
# var1,var2,var3,var4=albumtuplevar1
# print(var1)
# print(var2)
# print(var3)
# print(var4)
#the below piece of code will throw an error likeValueError: 
#too many values to unpack (expected 2
# var1,var2=albumtuplevar1
# print(var1)
# print(var2)
#append work in tuple
# albumtuplevar1.append("Action")

#tuple inside tuple
# albumtuplevar1 = "muthu","rahman",2000,((1,"oruvan oruvan"),(2,"kuluvall"),(3,"vidukathaya"))
# print(albumtuplevar1)
# title,composer,year,tracks =albumtuplevar1
# print(title)
# print(composer)
# print(year)
# print(tracks)
# albumtuplevar2 = "muthu","rahman",2000,(1,"oruvan oruvan"),(2,"kuluvall"),(3,"vidukathaya")
# print(albumtuplevar2)
# title,composer,year,track1,track2,track3 =albumtuplevar2
# print(title)
# print(composer)
# print(year)
# print(track1)
# print(track2)
# print(track3)
#
# #printing the tracks w/o knowing the count
# title,composer,year,tracks =albumtuplevar1
# print(title)
# print(composer)
# print(year)
# for song in tracks:
#     no,songtitle = song
#     print("songno-{},songtitle-{}".format(no,songtitle))
    # print(song)

#mutable object inside a tuple can be altered,like the below example the list 
#inside the tuple can be changed
albumtuplevar3 = "muthu","rahman",2000,[(1,"oruvan oruvan"),(2,"kuluvall"),(3,"vidukathaya")]
print(albumtuplevar3)
print(albumtuplevar3[3])
albumtuplevar3[3].append((4,"thillana thillana"))
print(albumtuplevar3)
for song in albumtuplevar3[3]:
    no,songtitle = song
    print("songno-{},songtitle-{}".format(no,songtitle))
title,composer,year,tracks =albumtuplevar3
tracks.append((5,"kokku seva kokku"))
print(albumtuplevar3)
for song in tracks:
    no,songtitle = song
    print("songno-{},songtitle-{}".format(no,songtitle))
 

Python List part2 and range part1 - Day3(posted next day)

there is a concept called iterator,ie the things which are iterable like string,lists,range

  
#list inside a list
# menu = [];
# menu.append(["egg","milk","spam"])
# menu.append(["egg","milk","spam","bacon"])
# menu.append(["egg","milk"])
#
# for menuilist in menu:
#     if "spam" not in menuilist:
#         print(menuilist)
#         for menuitem in menuilist:
#             print(menuitem)
#few examples of iterables are String,List
#iterator,for loop already handles this function automatically
stringvar = "12345asd"
my_iterator = iter(stringvar)
print(my_iterator)
print(next(my_iterator))
print(next(my_iterator))
print(next(my_iterator))
print(next(my_iterator))
print(next(my_iterator))
print(next(my_iterator))
print(next(my_iterator))
print(next(my_iterator))
#will print an error if it exceeds the last iterable
# print(next(my_iterator))

daysinweekvar = ["Sun","Mon","Tue","Wed","Thurs","Fri","Sat",]
# for i in daysinweekvar:
#     print(i)
print(len(daysinweekvar))
daysinweekitervar = iter(daysinweekvar)
for i in range(0,len(daysinweekvar)):
    print(next(daysinweekitervar))

  

range is also one of iterator,it will be usually used in for loop ,check out the example

  
print (range(0,100))
print (range(100))
print (list(range(0,100)))
print (list(range(100)))
print (list(range(0,100,2)))

oddvar1 = range(1,100,2)
oddlistvar1 = list(range(1,100,2))
print(oddvar1)
print(oddlistvar1)
print(oddvar1.index(9))
print(oddlistvar1.index(9))

print(oddvar1[2])
print(oddlistvar1[2])

sevens = range(7,10000,7)
var2 = int(input("enter any no less than 10k"))
for var3 in sevens:
    if var2 == var3:
        print("{} is divisble by 7".format(var2))