U3M3A3.3

#Wei Liu #11/16/2021 #U3M3A3.3 #We are learning about Tuples

# 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]))

# 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]))

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)

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

# [ ] Change the third element of T to [59, 20.4] T = ([43.6, 34], [49, 59], [50, 34.6], [39, 49]) T[2][0]=59 T[2][1]=20.4 print(T)

# [ ] 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) T1=L1+L2 T2=tuple(T1) print("This is my tuple: ",T2 )

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)

# 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))

# 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))

# [ ] 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:] print("T1:",T1) print("T2:",T2)

# [ ] 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,l,s,t=T print("After unpacking the tuple:", T) print("x =", x) print("l =", l) print("s =", s) print("t =", t)

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

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)

# 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")

# 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")

# 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)

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

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

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

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

# [ ] 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 T1 = (5, 4, 3) T2 = (9, 2, 12) T=T1+T2 print(T)

# [ ] 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=int(input("Please enter a number: ")) if x in T: print("The number {} is contained in T" .format(x)) elif x not in T: print("The number {} is not contained in T" .format(x))

# Write a function to return the largest element in a tuple T T = (23, 45, 93, 59, 35, 58, 19, 3) print(max(T))

# [ ] Write a program to compute the average of the elements in T T = (23, 45, 93, 59, 35, 58, 19, 3) print("Average = ",sum(T)/len(T))