1.2. Python Exercise#

1.2.1. Task 1 (Containers)#

For a list which contains three sublists precipitation = [[0, 0, 3.0], [1.1, 4.8, 0], [0, 0, 0]], write a program to find the maximum for each sublist and print it as a dictionary whose key is sublist_n (where n is the index of sublist) and value is the corresponding maximum.

Hint: use max() to obtain the maximum of a list. You could also try to use dictionary comprehension to accomplish this within one line of code.

# Your solution goes here.
precipitation = [[0, 0, 3.0], [1.1, 4.8, 0], [0, 0, 0]]

{'sublist_0': 3.0, 'sublist_1': 4.8, 'sublist_2': 0}

1.2.2. Task 2 (Control flows)#

Write a program to print all prime numbers within the range range(25, 50).

Hint: a prime number is a natural number greater than 1 that is not a product of two smaller natural numbers. You may wish to use the following statements:

  • use for num in range(25, 50) to iterate over all numbers;

  • for a specific number, use for i in range(2, num) to iterate over potential factors except 1;

  • use (num % i) == 0 to determine whether i is truly a factor of num (if it is true, num is not a prime number); and

  • use break to stop one loop.

# Your solution goes here.

1.2.3. Task 3 (Functions)#

Following Task 2, define a function that returns the list of prime numbers for a specified range. Then, use this function to print the prime numbers within the ranges range(25, 50) and range(50, 100) respectively.

Hint: in the function, you may define an empty list prime_num = [] at first and use the append method to add prime numbers.

# Your solution goes here.