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:
Python
# 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:
Example 2: Reversing the order of lines. We will use the above text file as input.
Python3
# 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:
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