Python Text File Program Solution from Sumita Arora Book

Count characters, words and lines present in a text file using python program

Note : text file and python program must present in same foloder

Count words in a file

f=open('abc.txt')

c=0

s=f.read()  # read file and store the content of file in a string s

w=s.split() # split the contents of s and store it into list w 

for i in w:

    c=c+1

print(c)

f.close()

Count ‘india’ word from file

f=open('abc.txt')

c=0

s=f.read()

w=s.split()

for i in w:

    if(i=="india"):

        c=c+1

print(c)

f.close()

Count  and print words having length <=3  from file

f=open('abc.txt')

c=0

s=f.read()

w=s.split()

for i in w:

    if(len(i)<=3):  #match the length of item in list

        print(i)

        c=c+1

print(c)

Count lines in a file

f=open('abc.txt')

c=0

list=f.readlines() # Read lines from file and store in a list named list

for i in list:

    c=c+1

print(c)

f.close()

Count lines starts from ‘s’ 

f=open('abc.txt')

c=0

list=f.readlines()

for i in list:

    if(i[0]=='s'): # match each item of list starts with s or not

        c=c+1

print(c)

f.close()

Count characters from file

f=open('abc.txt')

count=0

s=f.read()

w=s.split()

for i in w:      # traverse every item in list

    for c in i:  # traverse every character in item

        count=count+1

print(count)

Count lower case alphabets from file

f=open('abc.txt')

count=0

s=f.read()

w=s.split()

for i in w:

    for c in i:

        if(i.islower()): # find the given character is lower case or not

            count=count+1

print(count)

Count number of  digits present in text file

f=open('abc.txt')

count=0

s=f.read()

w=s.split()

for i in w:

    for c in i:

        if(i.isdigit()): # find the given character is digit or not

            count=count+1

print(count)

Print first and last line of text file

f=open('abc.txt')

lines=f.readlines()

print(lines[-1])   # -1 is the index of last item in a list

print(lines[0])    # 0 in the index of first item in a list

Print longest line from  a text file

f=open('abc.txt')
c=0
list=f.readlines()
longest=""
for i in list:
    if(len(i)>len(longest)): 
        longest=i
print(longest)

Program to display size of a file in bytes

f=open('abc.txt')

s=f.read()  # read file and store the content of file in a string s

size=len(s)

print("size in bytes:",size)