Create unit9_ex9.1.2.py

Author: lironmiz

unit9_ex9.1.2.py

@@ -0,0 +1,49 @@
+# exercise 9.1.2 from unit 9
+'''
+Write a program that receives from the user:
+
+Path to text file (string)
+Name of one of the operations: rev, sort or last (string)
+The file we return is passed as an argument containing lines of lowercase word sequences separated by a single space.
+
+According to the name of the action received from the user, the program performs:
+
+sort - the program prints all the words in the transferred file as a sorted list in alphabetical order, without duplicates.
+rev - the program prints the characters in each line in the file in reverse order, i.e. from the end to the beginning.
+last - the program receives another parameter from the user which is an integer (n), and prints the last n lines in the file (assume that the number is positive and less than or equal to the number of lines in the file).
+An example of an input file and lectures of the program
+A file called sampleFile.txt:
+
+i believe i can fly i believe i can touch the sky
+I think about it every night and day spread my wings and fly away
+Run the program on the file sampleFile.txt:
+
+>>> Enter a file path: c:\sampleFile.txt
+>>> Enter a task: sort
+['about', 'and', 'away', 'believe', 'can', 'day', 'every', 'fly', 'i', 'it', 'my', 'night', ' sky', 'spread', 'the', 'think', 'touch', 'wings']
+>>> Enter a file path: c:\sampleFile.txt
+>>> Enter a task: rev
+yks eht hcuot nac i eveileb i ylf nac i eveileb i
+yawa ylf dna sgniw ym daerps yad dna thgin yreve ti tuoba kniht i
+>>> Enter a file path: c:\sampleFile.txt
+>>> Enter a task: last
+>>> Enter a number: 1
+I think about it every night and day spread my wings and fly away
+'''
+
+def main():
+    file_path = input("Enter a file path: ")
+    task = input("Enter a task: ")
+    with open(file_path, 'r') as f:
+        lines = f.readlines()
+    if task == 'sort':
+        words = sorted(set(line.split() for line in lines))
+        print(words)
+    elif task == 'rev':
+        reversed_lines = [line[::-1] for line in lines]
+        print(reversed_lines)
+    elif task == 'last':
+        n = int(input("Enter a number: "))
+        print(lines[-n:])
+
+main()