Question

(1) Prompt the user for a title for data. Output the title. (1 pt)

Ex:

Enter a title for the data:
Number of Novels Authored
You entered: Number of Novels Authored

(2) Prompt the user for the headers of two columns of a table. Output the column headers. (1 pt)

Ex:

Enter the column 1 header:
Author name
You entered: Author name

Enter the column 2 header:
Number of novels
You entered: Number of novels

(3) Prompt the user for data points. Data points must be in this format: string, int. Store the information before the comma into a string variable and the information after the comma into an integer. The user will enter -1 when they have finished entering data points. Output the data points. Store the string components of the data points in a list of strings. Store the integer components of the data points in a list of integers. (4 pts)

Ex:

Enter a data point (-1 to stop input):
Jane Austen, 6
Data string: Jane Austen
Data integer: 6

(4) Perform error checking for the data point entries. If any of the following errors occurs, output the appropriate error message and prompt again for a valid data point.

• If entry has no comma

• Output: Error: No comma in string. (1 pt)

• If entry has more than one comma

• Output: Error: Too many commas in input. (1 pt)

• If entry after the comma is not an integer

• Output: Error: Comma not followed by an integer. (2 pts)

Ex:

Enter a data point (-1 to stop input):
Ernest Hemingway 9
Error: No comma in string.

Enter a data point (-1 to stop input):
Ernest, Hemingway, 9
Error: Too many commas in input.

Enter a data point (-1 to stop input):
Ernest Hemingway, nine
Error: Comma not followed by an integer.

Enter a data point (-1 to stop input):
Ernest Hemingway, 9
Data string: Ernest Hemingway
Data integer: 9

(5) Output the information in a formatted table. The title is right justified with a minimum field width value of 33. Column 1 has a minimum field width value of 20. Column 2 has a minimum field width value of 23. (3 pts)

Ex:

        Number of Novels Authored
Author name         |       Number of novels
--------------------------------------------
Jane Austen         |                      6
Charles Dickens     |                     20
Ernest Hemingway    |                      9
Jack Kerouac        |                     22
F. Scott Fitzgerald |                      8
Mary Shelley        |                      7
Charlotte Bronte    |                      5
Mark Twain          |                     11
Agatha Christie     |                     73
Ian Flemming        |                     14
J.K. Rowling        |                     14
Stephen King        |                     54
Oscar Wilde         |                      1

(6) Output the information as a formatted histogram. Each name is right justified with a minimum field width value of 20. (4 pts)

Ex:

         Jane Austen ******
     Charles Dickens ********************
    Ernest Hemingway *********
        Jack Kerouac **********************
 F. Scott Fitzgerald ********
        Mary Shelley *******
    Charlotte Bronte *****
          Mark Twain ***********
     Agatha Christie *************************************************************************
        Ian Flemming **************
        J.K. Rowling **************
        Stephen King ******************************************************
         Oscar Wilde *

Answer 1

#!/usr/bin/env python

# coding: utf-8

# In[32]:

# Taking title from user

title=input("Enter a title for the data:\n").strip()

print("You entered:",title)

# In[33]:

col1 = input("Enter the column 1 header:\n").strip()

print("You entered:",col1)

col2 = input("\nEnter the column 2 header:\n").strip()

print("You entered:",col2)

# In[34]:

# TO store strings

strings = list()

# TO store integers

integers = list()

# Total count

count = 0

# LOOP until user enters -1

while(True):

  line = input("\nEnter a data point (-1 to stop input):\n")

  

  # if entered -1

if(line=="-1"):

  break

  

  # if , count is not existed

elif(line.count(',')==0):

  print("Error: No comma in string.")

  

  # if comma existed

else:

  # make list

line = line.strip().split(",")

# if line has more than 2 commas

if(len(line)>2):

  print("Error: Too many commas in input.")

else:

  # rempve spaces

number = line[1].strip()

# Exception handling for integer conversion

try:

  # Add string to list

strings.append(line[0].strip())

# Add integer to list

integers.append(int(number))

count = count + 1 # Increase count

# Print values

print("Data string:",line[0].strip())

print("Data integer:",number)

# If second value is not integer

except:

  print("Error: Comma not followed by an integer")

  

  

  # In[35]:

  

  

  # Right justify title of 33 length

print(title.rjust(33,' '))

# print col 1 and col2 as left & right justify

print(col1.ljust(20,' ')+'|'+col2.rjust(23,' '))

# print '-' length of 44

print('-'*44)

# print all the values in given format

for i in range(count):

  print(strings[i].ljust(20,' ')+'|'+str(integers[i]).rjust(23,' '))

  

  

  # In[37]:

  

  

  # Histogram in given format

for i in range(count):

  print(strings[i].rjust(20)+' '+('*'*integers[i]))