PYTHON Study Guide - Modulo Operation

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vimalmsr02

26 May 2023

School

Anna University - Chennai

Department

Graphic Design

Course

PYTHON

Professor

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Document Summary

#37 python tutorial for beginners | pass list to a function in python. Section overview: in this section, the speaker discusses how to pass a list of elements as an argument in python functions. They also explain how to return multiple values from a function. ## creating a function that returns even and odd numbers. To create a function that returns even and odd numbers, start by defining the function name and taking the list as an argument. Use a for loop to iterate through each element in the list. Use an if statement with modulo operator to check if each element is even or odd. If it"s even, increment the value of "even" variable by 1; otherwise, increment the value of "odd" variable by 1. Once you have counted all even and odd numbers, print out their respective counts using string formatting with dot format method.

Related Questions

Given the following main program

#main
a = [5,2,9,6,3] doubleList(a) print a

Implement the function named doubleList that takes one list argument and modifies the list so that each element in the list is doubled. The statement print(a) in the main program will then have to print [10,4,18,12,6]
Given the following main program

#main
a = [5,2,9,6,3]
b = reversedList(a) print b
print a

Implement the function named reversedList that takes one list argument and returns a list that contains the elements in the list argument in reverse order. The statement print(b) in the main program will then have to print [3,6,9,2,5]. The statement print(a) must print the original list [5,2,9,6,3] unaffected. This means your function should not modify the list argument.
Given the following main program

#main
a = [5,2,9,6,3] reverseList(a) print a

Implement the function named reverseList that takes one list argument and reverses the list so that the modified list contains the same elements in reverse order. The statement print(a) in the main program will then have to print [3,6,9,2,5]
What is the return value of the functions doubleList, reversedList and reverseList in questions 1, 2, and 3 above?

Given the following main program

#main
a = [5,2,9,6,3]
b = evenElements(a) print b

Implement the function named evenElements that takes one list argument and returns a list that contains the elements in the list argument that are even integers. The statement print(b) in the main program will then have to print [2,6]. What is the return value of the function? Your function should not modify the list argument.
Given the following main program

#main
a = [5, 2, 9, 6, 3, 7, 19, 4, 8, 17, 21, 20, 15] removeOddElements(a)
print a

Implement the function named removeOddElements that takes one list argument and modifies the list so that all odd integers in the list are removed. The statement print(a) in the main program will then have to print [2,6,4,8,20]. What is the return value of the function?
Part A
#Main program A=[5,8,2,0,-5,3] n=-5
answer = isFound(A, n) if answer == True:

print "The integer is found in the list" else:

print "The integer is not found in the list."

Consider the main program shown above. Write a Python function named isFound that takes a list of integers and an integer as arguments and returns True if the integer is found in the list; otherwise it returns False.

Remark: You are NOT allowed to use the in operator or any other built in function when you write this function. Instead, you must write a loop to go through the elements of the list.

Part B

Give the following main program

#main
A = [5,2,9,6,3]
B = [2,4,3,9,7,1,6,5]
flag = isList1InList2(A, B) if flag:

print "The list", A, "is contained in the list", B else:

print "The list", A, "is not contained in the list", B

Implement the function named isList1InList2 that takes two list arguments and returns True if and only if each element of the first list argument are found in the second list argument; otherwise it returns False.

Remark: You are NOT allowed to use the in operator or any other built in function when you write this function. Instead, if you wish, you can use the function you wrote in Part A.

For the lists shown in the main program, your function must return True because each element of list A is found in list B.

A given List is known as Palindrome List if the reverse of the List contains the same elements in the same order of the original List. For example the List of integers [2, 5, 0, 3, 3, 0, 5, 2] is a Palindrome because the reverse of the List which is [2, 5, 0, 3, 3, 0, 5, 2] contains the same elements in the same order as the given List. However the List [1, 2, '2', 1] is not Palindrome because its reverse which is [1, '2', 2, 1] does not contain the same elements in the same order as the given List.

Write a Python function named isPalindrome that takes a List as argument and returns True if the argument is a Palindrome List; otherwise it returns False. You don't need to write the main program; just write the function. If you would like to test your function, then it is ok to write the main program too but you will not get any mark for the main program.
Given your function in question #7 above, what is the output of the following code: a=[]

b = [5,2,9,6,3]

print isList1InList2(a,b)
Given your function in question #7 above, what is the output of the following code:

a=[]
b=[]
print isList1InList2(a,b)
Given your function in question #7 above, what is the output of the following code: a = [5,2,9,6,3]

b=[]

print isList1InList2(a,b)

Given the following main program

#main
a=[]
n = readListElements(a)
print "The user entered", n, "elements to the list" print a

Implement the function named readListElements that takes one list argument and modifies the list by repeatedly asking the user to enter integer values and then appending them to the list. The process stops when the user enters -1000. The stopping value -1000 should not be appended to the list. Moreover your function must count the appended elements and return it. Example if the user enters the integers 31, -4, 9, 1,-1000 then your function must modify the list a to a = [31, -4, 9, 1] and return the number elements added which is 4.
Write a function named createRandomList that takes an integer argument n and returns a list with n elements. The elements must be random numbers in the range [0,100]

Given the following main program:

#main

   n = int(input("How many elements do you want in your list? "))
   a = createList(n)
   s1 = sumOfElementsAtEvenIndexes(a)
   print s1

   s2 = sumOfElementsAtOddIndexes(a)
   print s2
   s3 = sumOfAllElements1(a)
   print s3

   s4 = sumOfEvenElements(a)
   print s4
   s5 = sumOfOddElements(a)
   print s5

   s6 = sumOfAllElements2(a)
   print s6
   if (s3 != s6):

         print "Something is wrong in your program."
   else:

         print "Looks like you have done a good job."

Implement the functions as follows:

createList: returns a list object with n elements. The elements are generated randomly so that each element is in the range [15,45]
sumOfElementsAtEvenIndexes: returns the sum of the elements at even indexes. Use a for loop or a while loop.
sumOfElementsAtOddIndexes: returns the sum of the elements at odd indexes. Use a for loop or a while loop.
sumOfAllElements_A: returns the sum of all the elements in the list using the functionssumOfElementsAtEvenIndexes and sumOfElementsAtOddIndexes. Here you are NOT allowed to use any loop; instead make function calls as described.
sumOfEvenElements: returns the sum of the even integer elements in the list. Use a for loop or a while loop.
sumOfOddElements: returns the sum of the odd integer elements in the list. Use a for loop or a while loop.
sumOfAllElementsB: returns the sum of all the elements in the list using the functions sumOfEvenElements and sumOfOddElements. Here you are NOT allowed to use any loop; instead make function calls as described.

17. Most data compression algorithms like winzip, gzip, lzip and etc are based on the frequency distribution of characters in a given string. Write a function named getFreqDistribution that takes a string argument and returns a LIST that has length 26 such that the first element of the list is the number of appearance of 'a' or 'A' in the string, the second element is number of appearance of 'b' or 'B', and so on so forth.

I'm studying python 2 and have a lot of troubles with solving these homework questions.

grayelk171

1.Create a list that contains 10 successive integers starting with the value in the variable start. For example, if start is 7, the resulting list should be [7, 8, 9, 10, 11, 12, 13, 14, 15, 16]. Store the list in a variable named my_list. Assume that the value of start has already been set.

2.Create a list that is made up of the first half of the elements of a list called original_list. Store the new list in a variable called half_list. Assume that the original list has already been initialized and contains an even number of elements.

3. Write a predicate function called same_ends that accepts a list of integers and an integer (n) as arguments. Return True if the first n numbers in the list are the same as the last n numbers in the list, and False otherwise. For example, if the list was [1, 2, 3, 4, 99, 1, 2, 3, 4], the function would return True if n is 4 and False if n is 3. Assume that n is between 1 and the length of the list, inclusive.

4.Write a function called highest_values that accepts as arguments a list of numeric values and a single integer (n). The function should return a list made up of the largest n values from the argument list in order from lowest to highest. For example, if the argument list is [46, 82, 25, 61, 70, 33, 54] and n is 3, the return value should be [61, 70, 82]. Assume that the argument list contains at least n elements.

5.Assume that a list of integers stored in a variable named original contains exactly two elements that are zero. Write code that creates a separate list that contains the elements from original that are between the two zeros. Do not include the zeros in the new list. Store the list in a variable named between_zeros.

6. Write a function called price_range that accepts a list of floating-point numbers representing prices as an argument and returns the the difference between the highest price and the lowest price. Do NOT use the built-in functions max or min in your solution. Assume that all prices are positive values and that none of them exceed 10,000.00.

7. Write a function called count_vowels that accepts a string argument that represents a word and returns the number of vowels that are in the word. The vowels are A, E, I, O, and U (ignore the 'sometimes Y' rule). Count both uppercase and lowercase vowels.

Assume that the variable table holds a two-dimensional list of integers. Write code that computes the sum of all elements in the table, assigning the result to the variable table_sum.

emeraldhorse214

Python Programming Tutorial

In this Python tutorial, you'll learn everything you need to start programming in Python. This tutorial is perfect for data science, machine learning, and web development. No prior knowledge in Python or programming is required as everything will be taught from scratch. I'm Mosh Hamadani, and I've taught millions of people how to code through this channel. If you're new here, make sure to subscribe as I upload new videos every week. Let's jump in and get started.

What is Python?

Python is a multipurpose programming language that can be used for a variety of different tasks, such as automation, web development, and data science.

You can use Python in automation to automate repetitive tasks and save time and increase productivity.
You need to install a code editor to write your own Python code.
You can build amazing websites powered by Python.

We'll be using PyCharm as our code editor in this tutorial. When you open PyCharm for the first time, you have to configure a few settings, but we can skip that for now and set defaults. Let's create a new project and collapse the project window to give more space. We can then print a message on our application window.

Running Python Code

To run Python code in PyCharm, we go to the run menu and select run, or use the shortcut (ctrl+shift+r on a Mac). Then select the app to run, and the output will appear in the terminal window. Python is case sensitive so make sure to use the correct case when coding. We can declare variables, such as age and price, and assign them values. Python also has boolean values that can be true or false.

Now let's start coding!

age = 30
print(age)
price = 19.95
print(price) Declare and Use Variables in Python

Here's a little exercise for you: imagine we want to write a program for a hospital, so we're going to check in a patient named John Smith. He's 20 years old and is a new patient. I want you to declare a few variables to store these values.

Use the comment section below to share your code.

Receiving User Input in Python

In Python, we have a built-in function called input() that we use to read a value from the terminal window. We can add a string argument to the function to prompt the user for input.

Let's write a simple program to demonstrate this:

name = input("What is your name? ")print("Hello, " + name)

When we run this program, it will prompt the user to input their name. Once a value is entered, the program will print the greeting message with the input value.

Data Types in Python

There are three main data types in Python: numbers, strings, and booleans.

Numbers - This includes integers and floating-point numbers.
Strings - This includes textual data.
Booleans - This includes True and False values.

Converting Data Types in Python

Python has several built-in functions for converting the types of our variables. For example, we have the int() function for converting a value to an integer:

birth_year = "1982"age = 2020 - int(birth_year)print("You are " + str(age) + " years old.")

In the above example, we use the int() function to convert the birth_year string to an integer so we can subtract it from the current year.

We also have the float() function for converting a value to a float:

num = "10.5"float_num = float(num)print(float_num)

In the above example, we use the float() function to convert the num string to a floating point number.

Type Conversion in Python

In programming languages like Python, there are times when you need to convert a variable from one type to another. In this tutorial, I'll show you a bunch of cool things you can do with strings using Python for beginners.

In Python, the index of the first character in a string is 0. So, when we run this program, you're going to see 1 on the terminal because the index is 1.

print("Hello World"[1]) # Output: e

The float function is used to convert a string to a float value.

first = float(input("Enter the first number: "))

We can also change this expression to first + second, which is another way to write this piece of code.

The lower method is used to convert a string to lowercase or to find a character or a sequence of characters.

string = "Hello World"print(string.lower()) # Output: hello worldprint(string.find('o')) # Output: 4print(string.replace('o','a')) # Output: Hella Warld

The in operator can be used to check if a string contains a character.

string = "Python is a programming language for beginners."print('language' in string) # Output: True Arithmetic Operators in Python

Python has various arithmetic operators that we can use, such as addition (+), subtraction (-), multiplication (*), and division (/).

print(10 + 3) # Output: 13

We also have an augmented assignment operator in Python that means incrementing a variable by a value.

x = 5x += 3 # Output: 8

Operator precedence in Python is similar to math, but we can always use parentheses to change the order of operations.

x = 10 + 3 * 2 # Output: 16

Multiplication and division have a higher order, so they are evaluated first. That's why the answer is 16.

x = 10 + 3 / 2print(x) # Output: 11.5

When we print x, we get 11.5.

x += 3print(x) # Output: 14.5

When we run x += 3, we get 14.5 as the result. When we run x == 13, it will store False in the x variable.

x = 1000 # Output: 1000

sheikraja09

PYTHON Study Guide - Modulo Operation

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