Question

USING PYTHON PROGRAMMING LANGUAGE

15. Write code to open a file named data.txt, which contains 3 numbers, and print the sum of those numbers to the console 16. Write code that opens a file named words.txt containing an essay, and the prints out the SECOND word in the file to the console

Answer 1

#Source code of the above program no. 16 is given below

#For Indentation part you have to see the image below

#Assuming words.txt file contains atleast one word per line

f = open("words.txt","r") #opens file with name of "word.txt"
firstLine=" ".join(f.readline().split()[:2])#reading two words of 1st line
firstArr=firstLine.split()# storing word by word in array
print("SECOND word in the file words.txt is given below:")
#checking whether the line contains the second word or not
if len(firstArr)>=2 :
print(firstArr[1])
#if 1st line does not have 2nd word
else:
secLine=" ".join(f.readline().split()[:2])#read 2nd line's first two words
secArr=secLine.split()# storing word by word in array
if len(secArr)>=1:
print(secArr[0])#display 1st word of 2nd line
f.close()#closing file

#For better understanding output screenshot with code image and input file is attached here

#Source code of the above program no. 15 is given below

#For Indentation part you have to see the image below

from decimal import *
f = open('data.txt','r')#openning file
arrayList = []
#reading numbers into a list
for line in f.readlines():
arrayList.extend(line.split())
#display result
print("Data present in file data.txt: ")
print(*arrayList)
print("Sum of those numbers:",end=' ')
#computing sum
print(sum(Decimal(i) for i in arrayList))
f.close()#closing file

# For better understanding output screenshot with code image and input file is attached here*/

data Notepad File Edit Format View Hel 37 46 28 readNumFromFile.py - D: PythonSourcelreadNumFromFile.py (3.6.3) 1回 File Edit Format Run Options Window Hel from decimal import* f-open ( ' data . txt ' , ' r ') # openning file arrayList[] #reading numbers into a list for line in f.readlines () arrayList.extend (line.split )) #display result print ("Data present in file data.txt: ") print ( arrayList) print ("Sum f those numbers: " , end=' ') computing sum print (sum (Decimal (i) for i in arrayList) ) f. close ( ) #closing file Python 3.6.3 Shell File Edit Shell Debug Options Window Help Python 3.6.3 (v3.6.3:2c5feds, Oct 3 2017, 17:26:49) [MSC v.1900 32 bit (Intel) on win32 Type "copyright", "credits" or "license ) " for more information. RESTART: D:\PythonSource\readNumFromFile.py Data present in file data.txt 37 46 28 Sum of those numbers 111

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