Question

please write simple python code

Write a program to replicate the behavior of UNIX utility “tail”. It takes one or more files and displays requested number of lines from the ending. If number is not specified, then it print 10 lines by default.

Answer 1

Below is the code for mentioned problem statement:

Since tail command will select the n lines from end of the file.

def tail(*args, length=10):
    for file_name in args:
        try:
            with open(file_name, 'r') as infile:
                actualLength = length
                line = infile.readlines()
                print(file_name)
                if len(line) < actualLength:
                    actualLength = len(line)
                for index in range(len(line) - actualLength, len(line)):
                    print(line[index].strip())

        except:
            print('Could not read file: {}'.format(file_name))

if __name__ == '__main__':
    tail('tail.txt', length=2)

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