BIM114 Programming Fundamentals: Python Mix Assessment Answer
Answer
1. Write a program to read a text file, employeenames.txt, and creates anther file called “usernames.txt” with usernames with format first character of first word and the complete second word. Your program must work with any given two files.
Ex: the first name in the employeeNames.txt file is Sai Lakkaraju. His username must be
“slakkaraju”
Program Pseudocode
1. get input file name from the user
2. read the input file line by line
3. get first name from the read line
4. get last name from the read line
5. create the username
6. write the username into the file
7. close the files.
Program structure
#get input file name from the user
# open the input file in read mode
# open the output file in write mode
#read the input file line by line
# get first name from the line
#get last name from the tline
#create the username
#save the username to the file
#close the files
Program Code
#get input file name from the user
filename = input("Enter input file name: ")
# open the input file in read mode
file1 = open(filename,"r")
# open the output file in write mode
outFile = open("usernames.txt","w+")
#read the input file line by line
for line in file1:
line = line.strip()
# get first name from the line
firstName = line.split(" ")[0]
#get last name from the tline
lastName = line.split(" ")[1]
#create the username
username = firstName.lower()[0:1] + lastName.lower()
#save the username to the file
outFile.write(username+"\n")
print("Usernames saved to 'usernames.txt'")
#close the files
file1.close()
outFile.close()
2. The body mass index (BMI) is calculated as a person’s weight (KG) divided by the square of the person’s height (in inches). A BMI in the range 19-25 (inclusive) is considered healthy. Write a program that calculates a person’s BMI and prints a message telling whether they are above, within, or below the healthy range.This program must keep on calculating BMI for the given input till user says, “they don’t want to continue”.
Program Pseudocode
1. loop till user want to calculate BMI
2. get height from the user
3. get weight from the user
4. calculate bmi
5. print BMI and the user message according to BMI
6. Check whether the user wants to continue or not
Program structure
#loop till user choice is yes
# get user height
# get user weight
#calculate BMI
#print the BMI
# BMI is less than 18.5, underweight
# BMI is greater than 24.9, overweight
# check whether the user wants to continue?
Program Code
choice = 'yes'
#loop till user choice is yes
while choice =='yes':
# get user height
height = float(input("Height(M): "))
# get user weight
weight = float(input("Weight(kg): "))
#calculate BMI
bmi = weight / (height * height)
#print the BMI
print("Your BMI is "+str(bmi)+".", end = "")
# BMI is less than 18.5, underweight
if bmi < 18.5:
print("You are underweight. Gain Weight to live longer.")
# BMI is greater than 24.9, overweight
elif bmi >24.9:
print("You are overweight. Lose Weight to live longer.")
else:
print("Congrats your BMI is NORMAL.")
# check whether the user wants to continue?
choice = input("\nDo you want to calculate other BMI? ").lower()
3. Write a program to compute the “N” th Fibonacci number where “N” is a value entered by the user. The Fibonacci sequence starts with 1,1,2,3,5,8, 13.... Each number in the sequence is the sum of the previous two (except the first two 1,1). Ex: input n = 10
Program Pseudocode
1. get the value of n from the user
2. initialize i, j and a list of numbers
3. add i and j to the list of numbers
4. find n-2 fibonaccin numbers and add them to the list of numbers.
5. display the result
Program structure
# get n as input
# list to contain the fibonacci numbers
# add iitial i and j to list
# add fibonacci n-2 fibonacci numbers
# add the current number
# print the result
Program Code
# get n as input
n = int(input("Enter the value of n : "))
# list to contain the fibonacci numbers
numbers = []
i = 1
j = 1
# add iitial i and j to list
numbers.append(i)
numbers.append(j)
# add fibonacci n-2 fibonacci numbers
for ii in range(0, n-2):
sum = i + j
j = i
i = sum
# add the current number
numbers.append(i)
# print the result
print(str(n)+"th Fibonacci number is "+str(i)+".")
print("The Fibonacci sequence is "+ str(numbers)[1:len(str(numbers))-1]+".")
4. Write a program that will read a text file as input and will display the word frequency in the text file.
Program Pseudocode
1. get input file name from the user
2. read the input file line by line
3. create a string which contains all the punctuation symbols
4. remove all the pucnctuations from the line
5. for each word in the line, add its frequency to the dictionary
6. sort the final dictionary by count and the word and print the result
Program structure
#get input file name from the user
# open the input file in read mode
# string with all punctuations
#create a new empty dictionary
#read the input file line by line
# this character is not in punctuations
# add to string if this character is not a punctuation mark
# split by spaces
# go through each word
# if word is in dictionary add count by 1
# if word not in dictionary, set count as 1
#sort and print the result
Program Code
#get input file name from the user
filename = input("Enter input file name: ")
# open the input file in read mode
file1 = open(filename,"r")
# string with all punctuations
punctuations = '''1234567890!()-[]{};:'"\,<>./?@#$%^&*_~'''
#create a new empty dictionary
freq = {}
#read the input file line by line
for line in file1:
line = line.strip()
nLine = ''
for c in line:
# this character is not in punctuations
if c not in punctuations:
# add to string if this character is not a punctuation mark
nLine = nLine + c
# split by spaces
words = nLine.split(" ")
# go through each word
for word in words:
word = word.lower()
if len(word) > 0:
# if word is in dictionary add count by 1
if word in freq:
freq[word] +=1
# if word not in dictionary, set count as 1
else:
freq[word] =1
#sort and print the result
for x in sorted(freq.items(), key=lambda x: (x[1],x[0]), reverse=True):
print(x[1],x[0])
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