Atharv Sqa, Author At SQA Tools

Program to read the data of two of the files and add it to a new file

In this python file program, we will read the data of two of the files and add it to a new file with the help of the below-given steps. Let’s consider we have readcontent.txt1 and readcontent.txt2 files with the below content.

				
					#readcontent.txt1
Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.

#readcontent.txt2
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Create two variables and assign their values equal to an empty string.
Open the first file using open(‘readcontent1.txt’) as f.
Read and store the data in the first file in the first variable using read().
Open the second file using open(‘readcontent2.txt’) as f.
Read and store the data in the second file in the first variable using read().
Add the new line at the end of the data in the first variable.
Now add the data in the second variable to the first variable.
Open the third file using open (‘writecontent.txt’, ‘w’) as f.
Add the merged data to it using write().

				
					# Create two empty strings
data = data2 = ""
# Open first file
with open('readcontent1.txt') as f:
# Read the data
    data = f.read()
# Open second file
with open('readcontent2.txt') as f:
# Read the data
    data2 = f.read()
# Add a new line
data += "\n"
# Combine data
data += data2
# Open third file in write mode and write the new data to it
with open ('writecontent.txt', 'w') as f:
    f.write(data)

Output : Open the writecontent.txt file to see the result

Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.

Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

extract characters from a text file into a list.

count the total number of characters in a file.

Program to extract characters from a text file into a list

In this python file program, we will extract characters from a text file into a list with the help of the below-given steps. Let’s consider we have readcontent.txt file with the below content.

				
					Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Open the first file by using open(“readcontent.txt”).
Where the file name is the name of the file.
Read the data and split it into words using file.read().split().
Create an empty list to store the characters in the file.
Use a for loop to iterate over the words.
Use a nested for loop to iterate over the characters in the word.
Add the characters to the list using append().
Print the output.

				
					# Open file in read mode
file = open('readcontent.txt')
# Read data and converting it into words
words = file.read().split()
# Create an empty list
list1 = []
# Iterate over words
for word in words:
# Iterate over Characters of the words
    for char in word:
    # Extract characters to the list
        list1.append(char)
# Print output
print("Characters in the file in the list: ",list1)

Output :

Characters in the file in the list: [‘L’, ‘i’, ‘n’, ‘e’, ‘1’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘I’, ‘n’, ‘d’, ‘i’, ‘a’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘2’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘A’, ‘m’, ‘e’, ‘r’, ‘i’, ‘c’, ‘a’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘3’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘C’, ‘a’, ‘n’, ‘a’, ‘d’, ‘a’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘4’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘A’, ‘u’, ‘s’, ‘t’, ‘r’, ‘a’, ‘l’, ‘i’, ‘a’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘5’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘A’, ‘f’, ‘r’, ‘i’, ‘c’, ‘a’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘6’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘K’, ‘o’, ‘r’, ‘e’, ‘a’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘7’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘G’, ‘e’, ‘r’, ‘m’, ‘a’, ‘n’, ‘y’, ‘.’, ‘L’, ‘i’, ‘n’, ‘e’, ‘8’, ‘:’, ‘T’, ‘h’, ‘i’, ‘s’, ‘i’, ‘s’, ‘C’, ‘h’, ‘i’, ‘n’, ‘a’, ‘.’]

check whether a file is closed or not.

read the data of two of the files created and add it to a new file.

Program to check whether a file is closed or not

In this python file program, we will check whether a file is closed or not with the help of the below-given steps. Let’s consider we have readcontent.txt file with the below content.

				
					#readcontent.txt
Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Open the file by using open(“readcontent.txt”,”r”).
Print file.closed, it will print True if the file is closed and False if not.
Now close the file.
Again use file.closed to check whether the file is closed or not.

				
					# Open file in read mode
f = open('readcontent.txt','r')
# Check whether the file is closed or not
print(f.closed)
# Close the file
f.close()
# Check whether the file is closed or not
print(f.closed)

Output :

False
True

write a tuple to a file.

extract characters from a text file into a list.

Python file program to write a tuple to a file

In this python file program, we will write a tuple to a file with the help of the below-given steps. Let’s consider we have readcontent.txt file with the below content.

				
					Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Create a tuple.
Open the file by using open(“readcontent.txt”,”w”).
Where file name is the name of the file and w is writing mode.
Inside write() use ” “.join(tup) to write the tuple in the file.
Close the file.

				
					# Create a tuple
tup = ('1','2','3')
# Open file in write mode
f = open('readcontent.txt','w') 
# Write tuple to file
f.write(" ".join(tup))
# Close the file
f.close()

Output : Open the readcontent.txt file to see the tuple.

1 2 3

get the file size of a file.

check whether a file is closed or not.

Python file program to get the size of a file

In this python file program, we will get the size of a file with the help of the below-given steps. Let’s consider we have readcontent.txt file with the below content.

				
					#readcontent.txt
Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Import the os library.
Open the file using os.stat(‘readcontent’) and store the output in the variable.
Get the size of the file using info.st_size.
Print the output.

				
					# Import os library
import os
# Read file
info = os.stat('readcontent.txt')
# Print size of the file
print("Size of the file: ",info.st_size)

Output:

Size of the file: 193

count the number of lines in a file.

write a tuple to a file.

Program to count the number of lines in a file

In this python file program, we will count the number of lines in a file with the help of the below-given steps. Let’s consider we have readcontent.txt file with the below content.

				
					Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Open the first file by using open(“readcontent.txt”,”r”).
Read the lines in the file using readlines().
Create a count variable and assign its value equal to 0.
Use a for loop to iterate over lines in the file.
After each iteration add 1 to the count variable.
Print the output.

				
					# Open file in read mode
file=open("readcontent.txt","r")
# Read lines
lines= file.readlines()
# Create count variable
count = 0
# Iterate over lines
for line in lines:
# Add 1 to count for each line
    count += 1
# Print output
print("Total number of lines in the file: ",count)

Output :

Total number of lines in the file: 8

compare two files.

get the file size of a file.

Python file program to compare two files

In this python file program, we will compare two files with the help of the below-given steps.. Let’s consider we have file1.txt and file2.txt files with the below content.

				
					#file1.txt
Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

#file2.txt
Jay - 3569872214
Yash - 9865472589
Ketan - 8854632255
Rajesh - 7020589634

Steps to solve the program

				
					# Impoer difflib library
import difflib 
# Open file and read lines
with open('file1.txt') as file_1:
# Open file and read lines
    file_1_text = file_1.readlines() 
with open('file2.txt') as file_2:
    file_2_text = file_2.readlines()
for line in difflib.unified_diff(
        file_1_text, file_2_text, fromfile='file name',
        tofile='file.txt', lineterm=''):
    print(line)

Output :

--- file1.txt
+++ file2.txt
@@ -1,8 +1,4 @@
-Line1 : This is India.

-Line2 : This is America.

-Line3 : This is Canada.

-Line4 : This is Australia.

-Line5 : This is Africa.

-Line6 : This is Korea.

-Line7 : This is Germany.

-Line8 : This is China.
+Jay - 3569872214

+Yash - 9865472589

+Ketan - 8854632255

+Rajesh - 7020589634

count the number of lines in a file.

Program to get all mobile numbers from a file

In this python file program, we will get all mobile numbers from a file with the help of the below-given steps.. Let’s consider we have readcontent.txt file with the below content.

				
					Jay - 3569872214
Yash - 9865472589
Ketan - 8854632255
Rajesh - 7020589634

Steps to solve the program

Open the first file by using open(“readcontent.txt”).
Read the data and split it into words using file.read().split().
Create an empty list to store the mobile number.
Use a for loop to iterate over words.
Check whether the word is a number or not using isnumeric().
If yes then check whether the length of the number is 10 or not.
If yes then add it to the empty list.
Print the output.

				
					# Open the file
file = open('readcontent.txt')
# Read data and converting it to words
data = file.read().split()
# Create an empty list
m_num = []
# Iterate over words
for val in data:
# Check whether a word in a numeric
    if val.isnumeric():
    # Check for mobile number
        if len(val) == 10:
    # Add number to the list
            m_num.append(val)
# Print output
print("Mobile numbers in the file: ",m_num)

Output :

Mobile numbers in the file: [‘3569872214’, ‘9865472589’, ‘8854632255’, ‘7020589634’]

get all odd and even length words in two lists.

Python file program to get all odd and even length words in two lists

In this python file program, we will get all odd and even length words in two lists with the help of the below-given steps.. Let’s consider we have readcontent.txt file with the below content.

				
					Line1 : This is India.
Line2 : This is America.
Line3 : This is Canada.
Line4 : This is Australia.
Line5 : This is Africa.
Line6 : This is Korea.
Line7 : This is Germany.
Line8 : This is China.

Steps to solve the program

Open the first file by using open(“readcontent.txt”).
Read the data and split it into words using file.read().split().
Create two empty lists even and odd.
Use a for loop to iterate over the words.
If the length of the word is even then add it to the even list, else add it to the odd list.
Use an if-else statement for this purpose.
Print the output.

				
					# Open the file
file = open('readcontent.txt')
# Convert data into words
words = file.read().split()
# Create empty lists
even = []
odd = []
# Iterate over words
for word in words:
# Check for odd,even words
# Add them to corresponding list
    if len(word)%2==0:
        even.append(word)
    else:
        odd.append(word)
# Print output
print("Words having even length: ",even)
print("Words having odd length: ",odd)

Output :

Words having even length:
[‘This’, ‘is’, ‘India.’, ‘This’, ‘is’, ‘America.’, ‘This’, ‘is’, ‘This’, ‘is’, ‘Australia.’, ‘This’, ‘is’, ‘This’, ‘is’, ‘Korea.’, ‘This’, ‘is’, ‘Germany.’, ‘This’, ‘is’, ‘China.’]

Words having odd length:
[‘Line1’, ‘:’, ‘Line2’, ‘:’, ‘Line3’, ‘:’, ‘Canada.’, ‘Line4’, ‘:’, ‘Line5’, ‘:’, ‘Africa.’, ‘Line6’, ‘:’, ‘Line7’, ‘:’, ‘Line8’, ‘:’]

generate text files with all alphabets. e.g. A.txt , B.txt, C.txt….. Z.txt

get all mobile numbers from a file.

Program to generate text files with all alphabets names

In this python file program, we will generate text files with all alphabets names. In this program, there is no file to take as input because we will generate the files having all alphabets names.

Steps to solve the program

				
					# Import os,string library
import string, os
# Check if the files with the alphabet names exists or not
if not os.path.exists("letters"):
# If not then make a new file
   os.makedirs("letters")
# Iterate over letters in the alphabets
for letter in string.ascii_uppercase:
# Open the files with write mode
   with open(letter + ".txt", "w") as f:
   # Add corresponding letter to the file
       f.writelines(letter)

Output :

A.txt
B.txt
C.txt
D.txt
.
.
.
.
.
.
X.txt
Y.txt
Z.txt

get all odd and even length words in two lists.