Python Tutorial | Python Data File Handling 10

File Reading: Line by Line

Question: 1
Python Program to read a file “story.txt” line by line and display the contents
Sol:

Method:1

filepath = 'story.txt'
with open(filepath) as fp:
   line = fp.readline()
   cnt = 1
   while line:
       print("Line {}: {}".format(cnt, line.strip()))
       line = fp.readline()
       cnt += 1

Method:2

filepath = 'story.txt'
with open(filepath) as fp:
   line = fp.readline()
   cnt = 1
   while line:
       print(cnt,"  ",line,end='')
       line = fp.readline()
       cnt += 1

Question : 2
Python Program to read a file “story.txt” line by line and display the contents. Further count and print total lines in the file
Sol:

Method:1

filepath = 'story.txt'
with open(filepath) as fp:
   line = fp.readline()
   cnt = 0
   while line:
       cnt += 1
       print("Line {}: {}".format(cnt, line.strip()))
       line = fp.readline()
print("Total lines in file ",cnt)

Method:2

filepath = 'story.txt'
with open(filepath) as fp:
   line = fp.readline()
   cnt = 0
   while line:
       cnt += 1
       print(cnt,"  ",line,end='')
       line = fp.readline()
print("Total lines in file ",cnt)

Question : 3
Python Program to read a file “story.txt” line by line and display the contents. count and print total lines starting with “A” or “a” in the file
#Note:
#Using the above program we can display line starting with any character.
Sol:

Method:1

filepath = 'story.txt'
with open(filepath) as fp:
    line = fp.readline()
    cnt = 1
    while line:
        if(line[0]=='a' or line[0]=='A'):
            #print(line)
            print("Line {}: {}".format(cnt, line.strip()))
            cnt=cnt+1
        line = fp.readline()

Method:2

filepath = 'story.txt'
with open(filepath) as fp:
    line = fp.readline()
    cnt = 1
    while line:
        if(line[0]=='a' or line[0]=='A'):
            #print(line)
            print(cnt,"  ",line,end='')
            cnt=cnt+1
        line = fp.readline()

Question : 4
Python Program to read a file “story.txt” line by line and display the contents. count and print total lines starting with vowels (A,a,E,e,I,i,O,o,U,u) in the file
#Note:
#Using the above program we can display line starting with any character.
Sol:

Method:1

filepath = 'story.txt'
vowels="AEIOUaeiou"
with open(filepath) as fp:
    line = fp.readline()
    cnt = 1
    while line:
        if(line[0] in vowels):
            #print(line)
            print("Line {}: {}".format(cnt, line.strip()))
            cnt=cnt+1
        line = fp.readline()

Method:2

filepath = 'story.txt'
vowels="AEIOUaeiou"
with open(filepath) as fp:
    line = fp.readline()
    cnt = 1
    while line:
        if(line[0] in vowels):
            #print(line)
            print(cnt,"  ",line,end='')
            cnt=cnt+1
        line = fp.readline()

Python Basic Programming Tutorial

Python Introduction     Getting started in Python Programming      Python propgramming fundamentals     Python Operators    Python If Condition     Python for loop    Python range construct      Python While loop    break and continue statements     Different looping techniques     Python List     Python String     Python Functions    Python Inbuilt Functions     Python Recursion     Using Python Library     Python Tuples     Python Dictionary     Python Sets     Python Strings     Python Exception Handling     Python Data File Handling

Visitor Counter

0060936