Unit 8 : File Processing

Question 1

What does open() returns?

Answer 1

1. “file handle” - a variable used to perform operations on the file

• LIke “File -> Open” in a aword processor

Question 2

What does open() accepts? ( 2 )

Answer 2

handle = open( filename, mode )

Question 3

What are the mode for file handle?

Answer 3

1. r - to open a file for reading
2. w - to open a file for writing if file exist, otherwise create a file
3. a - to open a file for append if file exist, otherwise create a file

Question 4

What can we seperate the data?

Answer 4

1. Using seperator ( , )

Question 5

How can we write into file?

Answer 5

name = input(“Name : “)
f = open(“user.txt”, “a”)
f.write(name)
f.close
print(“Record Added”)

Question 6

How can we read from file?

Answer 6

f = open(“user.txt” , “r” )
for line in f:
print(line)

Question 7

How can we count line in a file?

Answer 7

f = open(“user.txt”)
count = 0
for line in f:
count = count + 1
print(“Line Count : “ , count )

Question 8

How can we search through a file? ( .startswith )

Answer 8

f = open(“user.txt”, “r”)
for line in f:
if line.startswith(“Jill”):
print(line)

Question 9

How can we search through a file? ( rstrip() )

Answer 9

f = open(“user.txt” , “r” )
for line in line:
line = line.rstrip()
print(line)

Question 10

How can we skip a lline?

Answer 10

f = open(“user.txt”,”r”)
for line in f:
line = line.rstrip()
if line.startswith(“Jack”):
continue
print(line)

Question 11

How can we select line ( in ) ?

Answer 11

f = open (“user.txt”, “r”)
for line in f:
line = line.rstrip()
if “jim@mail.com” in line:
print(line)