Python program to reverse the content of a file and store it in another file

Given a text file. The task is to reverse as well as stores the content from an input file to an output file. 
This reversing can be performed in two types.  

• Full reversing: In this type of reversing all the content gets reversed. 
   
• Word to word reversing: In this kind of reversing the last word comes first and the first word goes to the last position. 
   

Example 1: Full Reversing 
 

Input: Hello Geeks
 for geeks!
 

Output:!skeeg rof
 skeeG olleH
 

Example 2: Word to word reversing
 

Input: 
 Hello Geeks
 for geeks!

Output:
 geeks! for
 Geeks Hello

Example 1: Full Reversing 
Text file:
 

# Open the file in write mode f1 = open("output1.txt", "w") # Open the input file and get  # the content into a variable data with open("file.txt", "r") as myfile: data = myfile.read() # For Full Reversing we will store the  # value of data into new variable data_1  # in a reverse order using [start: end: step], # where step when passed -1 will reverse  # the string data_1 = data[::-1] # Now we will write the fully reverse  # data in the output1 file using  # following command f1.write(data_1) f1.close() 

Output:
 

Time complexity: O(n), where n is the length of the input file "file.txt".

Auxiliary space: O(n), where n is the length of the input file "file.txt".

Example 2: Reversing the order of lines. We will use the above text file as input.
 

# Open the file in write mode f2 = open("output2.txt", "w") # Open the input file again and get  # the content as list to a variable data with open("file.txt", "r") as myfile: data = myfile.readlines() # We will just reverse the  # array using following code data_2 = data[::-1] # Now we will write the fully reverse  # list in the output2 file using  # following command f2.writelines(data_2) f2.close() 

Output: