Python Answers

T9 is a predictive text technology for mobile phones (specifically those that contain a 3×4 numeric keypad). It allows the user to press a numerical key and form a set of keys. With this set of keys, T9 figures out exactly the word the user meant to type based on the list of valid words also called a dictionary. Here is exactly how T9 works: If the user wants to type a message to someone using a cellphone pad, they will only use the digits 2 through 9. The table below provides the corresponding letters for each digit:

Given a string, write a program to print a secret message that replaces characters with numbers 'a' with 1, 'b' with 2, ..., 'z' with 26 where characters are separated by '-'.

Note: You need to replace both uppercase and lowercase characters. You can ignore replacing all characters that are not letters.

abcdefghij12345678910

klmnopqr1112131415161718

stuvwxyz1920212223242526Input

The input will be a string in the single line containing spaces and letters (both uppercase and lowercase).Output

The output should be a single line containing the secret message. All characters in the output should be in lower case.Explanation

For example, if the given input is "python", "p" should replaced with "16", similarly"y" with "25","t" with "20","h" with "8","o" with "15","n" with "14". So the output should be "16-25-20-8-15-14".

Given a string, write a program to mirror the characters of the string in alphabetical order to create a secret message.

Note: Mirroring the characters in alphabetical order replacing the letters 'a' with 'z', 'b' with 'y', ... , 'z' with 'a'. You need to mirror both uppercase and lowercase characters. You can ignore mirroring for all characters that are not letters.

abcdefghijklmzyxwvutsrqpon nopqrstuvwxyzmlkjihgfedcbaInput

The input will be a string in the single line containing spaces and letters (both uppercase and lowercase).Output

The output should be a single line containing the secret message. All characters in the output should be in lower case.

Explanation

For example, if the given input is "python", "p" should replaced with "k", similarly "y" with "b", "t" with "g", "h" with "s", "o" with "l", "n" with "m". So the output should be "kbgslm".

Given a string, write a program to return the sum and average of the digits of all numbers that appear in the string, ignoring all other characters.Input

The input will be a single line containing a string.Output

The output should contain the sum and average of the digits of all numbers that appear in the string.

Note: Round the average value to two decimal places.Explanation

For example, if the given string is "I am 25 years and 10 months old", the digits of all numbers that appear in the string are 2, 5, 1, 0. Your code should print the sum of all digits(8) and the average of all digits(2.0) in the new line.

Given a string, write a program to return the sum and average of the numbers that appear in the string, ignoring all other characters.Input

The input will be a single line containing a string.Output

The output should contain the sum and average of the numbers that appear in the string.

Note: Round the average value to two decimal places.Explanation

For example, if the given string is "I am 25 years and 10 months old", the numbers are 25, 10. Your code should print the sum of the numbers(35) and the average of the numbers(17.5) in the new line.

Given a M x N matrix, write a program to print the matrix after ordering all the elements of the matrix in increasing order.Input

The first line of input will contain two space-separated integers, denoting the M and N.

The next M following lines will contain N space-separated integers, denoting the elements of each list.Output

The output should be M lines containing the ordered matrix.

Note: There is a space at the end of each line.Explanation

For example, if the given M is 3 and N is 3, read the inputs in the next three lines if the numbers given in the next three lines are the following.

1 20 3
30 10 2
5 11 15

By ordering all the elements of the matrix in increasing order, the ordered matrix should be

1 2 3
5 10 11
15 20 30

def invert_dict(d):

   inverse = dict()

   for key in d:

      val = d[key]

     if val not in inverse:

        inverse[val] = [key]

     else:

        inverse[val].append(key)

   return inverse 

Modify your program from the function above to read dictionary items from a file and write the inverted dictionary to a file. You will need to decide on the following:

• How to format each dictionary item as a text string in the input file.
• How to covert each input string into a dictionary item.
• How to format each item of your inverted dictionary as a text string in the output file.

Create an input file with your original three-or-more items and add at least three new items, for a total of at least six items.

Include: 

• The input file for your original dictionary (with at least six items)

Describe how catching exceptions can help with file errors. Write three Python examples that actually generate file errors on your computer and catch the errors with try: except: blocks. Include the code and output for each example in your post. 

Describe how you might deal with each error if you were writing a large production program. These descriptions should be general ideas in English, not actual Python code. 

Hi sir for the question:
Non-Adjacent Combinations of Two Words
Given a sentence as input, find all the unique combinations of two words and print the word combinations that are not adjacent in the original sentence in lexicographical order.
you answered like this:
((https://www.assignmentexpert.com/homework-answers/programming-and-computer-science/python/question-177142))
here in the solution we are inserting "be be" at index 0, but if we give other input, then also "be be" will be the first line of output right sir?
So can you please verify and answer it again?

Activity:

Create a program that accepts birth year and current year. Define a function that has 2 parameters: birthyear

and presentyear then it will calculate and returns the age. Define another function that will determine if the

age is minor or legal age.

FINISHED CODE:

def getAge():

def validateAge():

byear = int(input("Enter Birth Year:"))

pyear = int(input("Enter Present Year:"))

age = getAge()

validatedAge = validateAge()

print(f "Your age is {age} and it is {validatedAge}")

sample output:

Enter Birth Year: 1992

Enter Present Year:2021

Your age is 29 and it is legal