Text file handling (reading name and mark from a file)

Multiple Choice

Which instruction is used to create a text file for storing the data?

• open(file1,"r")

• open(file1,"w")

• file1=open("file.txt","r")

• file1=open("file.txt","a")

Multiple Choice

Which instructions can write three text data into a text file in three separated lines?

• for i in range(3):

  file1.write(data)

• for i in range(3):

  write(data+"\n")

• for i in range(3):

  file1.write(data+"\n")

• for i in range(3):

  file1.writelines(data+"\n")

Multiple Choice

Which instruction can read out all data from a text file and store the data in a list?

• data=file1.read()

• data = file1.readlines()

• data = file1.readline()

• data = file1.readlist()

Multiple Choice

Which instruction can remove "\n" from data?

• data=data.strip()

• data.strip()=data

• data=strip().data

• data=strip(data)

Multiple Choice

item=["Peter 50", "Paul 48", "Mary 45"]

Which instructions can use to split the data in items and store the name and the number separately?

• data=item[1].split()

  name=data[0]

  age=data[1]

• data=item.split()

  name=data[0]

  age=data[1]

• data=split(item)

  name=data[0]

  age=data[1]

• name=data.split()

  age=data.split()

​Reading out name and mark from a text file

file1=open("name_mark.txt","r")

outputstring=file1.readlines()

print(outputstring)

name=[""]*len(outputstring)     #initialize the name array with size outputstring

mark=[0]*len(outputstring)      #initialize the mark array with size outputstring

for i in range(len(outputstring)):

    outputstring[i]=outputstring[i].strip()

    item=outputstring[i].split()   #split the outputstring into a list item

    print(item)

    name[i]=item[0]             #store first item as name

    mark[i]=int(item[1])        #store second item as mark

file1.close

for i in range(len(outputstring)):

    print(name[i],mark[i])

Bubble sort (sorting the data in ascending order)

Algorithm:

•a=[7,4,6,8,1,5]
for i = 0 to len(a) - 2

    for j = 0 to (len(a) – i - 2)

       if a [j] > a[j + 1]

          swap the items
      endif

    next j

next i