CKM10L1

# Create a homogeneous int tuple T_int = (10, -4, 59, 58, 23, 50) type(T_int)

# Create a homogeneous string tuple T_string = ("word", "letter", "vowel", "spell", "book", "write", "read") type(T_string)

# Create heterogeneous tuples T = ("Tobias", 23, 25.3, []) type(T)

# Create heterogeneous tuples # A datetime object can be a tuple element from datetime import datetime now = datetime.today() T = ((1.5,2.6), "home", now) type(T)

T = ("switch") # This is not a tuple type(T)

T = ("switch",) # Note the comma after the string makes T a tuple type(T)

# List of employee names names_list = ["Suresh", "Colette", "Skye", "Hiroto", "Tobias", "Tamara", "Jin", "Joana", "Alton"] # Sort the names alphabetically sorted_list = sorted(names_list) # Convert list into tuple names_tuple = tuple(sorted_list) # List converted into a tuple print(type(names_tuple)) # Print the first and last name in the tuple print("First name is: {:s}".format(names_tuple[0])) print("Last name is: {:s}".format(names_tuple[-1]))

<class 'tuple'>
First name is: Alton
Last name is: Tobias

# Collect 3 int numbers from a user L = [] for i in range(3): tmp = int(input("Enter an int {:d}/3: ".format(i))) L.append(tmp ** 2) # Convert the list into a tuple T = tuple(L) # Print the content of the tuple print("Tuple of squares is:", T) # Print each of the tuple elements on a new line for i in range(3): print("T[{0:d}] = {1:d}".format(i, T[i]))

Tuple of squares is: (144, 1849, 0)
T[0] = 144
T[1] = 1849
T[2] = 0

T = ("Tobias", 23, 25.3, []) # Tuples are immutable and cannot be changed T[0] = "hello"

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T = ("Tobias", 23, 25.3, []) # A list inside a tuple can change T[-1].append(44) # The tuple did NOT change, it still refers to the same list; only the list was changed print(T)

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# [ ] Create a tuple that consists of the following variables x = 5 l = [4.4, 5.3] s = "something" t = (9, 0) t = (x,l,s,t)

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# [ ] Change the third element of T to [59, 20.4] T = ([43.6, 34], [49, 59], [50, 34.6], [39, 49]) # TODO: your code here T = list(T) T[2] = [59,20.4] T = tuple(T) print(T)

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# [ ] Write a program to merge the content of T1 and T2 into one tuple T # Correct output should be T = (5, 4, 3, 9, 2, 12) # T = ((5, 4, 3), (9, 2, 12)) is an incorrect output # Hint: Use list to/from tuple conversion T1 = (5, 4, 3) T2 = (9, 2, 12) L1 = list(T1) L2 = list(T2) T = (L1 + L2) T = tuple(T) print(T)

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T = (12, 24, 'name', 'city') # Slice the tuple into numerical and textual tuples numerical_tuple = T[0:2] print(numerical_tuple) textual_tuple = T[-2:] print(textual_tuple)

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# Swap variables using tuple unpacking e1 = 5 e2 = 109 print("\nBefore swapping:") print("e1 = {:3d}\t e2 = {:3d}".format(e1, e2)) e1, e2 = e2, e1 print("\nAfter swapping:") print("e1 = {:3d}\t e2 = {:3d}".format(e1, e2))

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# Split a full name into the first and last names def split_name(name): names = name.split(" ") first_name = names[0] last_name = names[-1] # pack the variables into a tuple, then return the tuple return (first_name, last_name) # Ask user for input name = input("Enter your full name: ") # Unpack the returned tuples into first, last variables # looks like the function returns 2 variables first, last = split_name(name) # Unpacked variables can be used separately print("First name: {:s}".format(first)) print("Last name: {:s}".format(last))

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# [ ] Write a program to split the content of T into T1 and T2 # T1 = (5, 4, 3) # T2 = (9, 2, 12) T = (5, 4, 3, 9, 2, 12) T1 = T[0:3] T2 = T[3:6] print(T1, T2)

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# [ ] Write an expression to unpack `T` into: # 1) x = 5 # 2) l = [3, 5.3] # 3) s = 'something # 4) t = (9, 0) T = (5, [3, 5.3], 'something', (9, 0)) #TODO: Your code goes here x = T[0] l = T[1] s = T[2] t = T[3] print("After unpacking the tuple:", T) print("x =", x) print("l =", l) print("s =", s) print("t =", t)

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# [ ] Complete the function `current_date` to return today's month, day, and year # Hint: Use an appropriate function from the datetime module from datetime import date def current_date(m,d,y): pass return m = date.month return d = date.day return y = date.year #TODO return month, day, year m, d, y = current_date() print("Today's date is: {:2d}/{:2d}/{:4d}".format(m, d, y))

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T = (4, [5, 6], 'name', 3.5, True) print("4 contained in T?", 4 in T) print("5 not contained in T?", 5 not in T ) print("False contained in T?", False in T)

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# Equivalent tuples, not identical T1 = (10, [2, 4], 59) T2 = (10, [2, 4], 59) if (T1 == T2): print("Equal tuples") else: print("Not equal tuples") if (T1 is T2): print("Identical tuples") else: print("Not identical tuples")

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# Identical tuples (also equivalent) T1 = (10, [2, 4], 59) T2 = T1 if (T1 == T2): print("Equal tuples") else: print("Not equal tuples") if (T1 is T2): print("Identical tuples") else: print("Not identical tuples")

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# Changing one of 2 identical tuples T1 = (10, [2, 4], 59) T2 = T1 # A change in T1 is a change in T2 T1[1][0] = 20 print("T1 = ", T1) print("T2 = ", T2)

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T1 = ("First", "Last") T2 = ("Middle",) # single element tuple # Concatenate two tuples T = T1 + T2 print(T)

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T1 = (10, [2, 4], 59) T2 = (59, [2, 4], 'name', 3.5, True) # Concatenate sliced tuples T = T1[1:] + T2[0:2] print(T)

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# length of tuple T1 = (10, [2, 4], 59) print(len(T1))

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# Iterate over elements of a tuple T1 = (10, [2,4], 59) for i in range(len(T1)): print("T1[{:d}] = {}".format(i, T1[i]))

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# [ ] Write a program to merge the content of T1 and T2 into one tuple T # Correct output should be T = (5, 4, 3, 9, 2, 12), # T = ((5, 4, 3), (9, 2, 12)) is an incorrect output # You should NOT use lists in your solution but concatenation T1 = (5, 4, 3) T2 = (9, 2, 12) T = T1 + T2 print(T)

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# [ ] Write a program to prompt the user for a number, then test if the number is contained in T T = (23, 45, 93, 59, 35, 58, 19, 3) x = input("please input an int") x = int(x) x in T

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# Write a function to return the largest element in a tuple T T = (23, 45, 93, 59, 35, 58, 19, 3) L = list(T) bn = 0 for x in L: if x > bn: bn = x print(bn)

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# [ ] Write a program to compute the average of the elements in T T = (23, 45, 93, 59, 35, 58, 19, 3) total = 0 count = 0 for x in T: total = total + x count += 1 print(total/count)

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