try_catch.py

x = int(input ('plesae enter a number between 1 and 5:'))
if x < 1 or x > 5:
    raise ValueError('the number should be between 1 and 5')
print(f"3 / x {3 / x}")

try:
    x = int(input ('plesae enter a number between 1 and 5:'))
    if x < 1 or x > 5:
        raise ValueError('the number should be between 1 and 5')
except (ValueError) as e:
    print(f"Caught a value error: ")
else:
    print(f"3 / x {3 / x}")
finally: 
    print('We made it!')

class FileManipulator:
  def __init__(self, fileName):
    self.contents = None
    while self.contents == None:
      try:
        myfile = open(fileName, 'r') # Open a file for 
        self.contents = myfile.readlines() # Read in the content by line.
      except (FileNotFoundError, TypeError, OSError) as e:
        print(type(e), e)
        fileName = input("Please enter a valid file name: ")
      else:
        myfile.close()
      
  def reverse(self,fileName):
    while True:
      try:
        myfile = open(fileName, 'w') # Open a file for writing
        revContent = [x.strip()[::-1] for x in self.contents]
        for i in range(len(revContent)):
          if i == (len(revContent)-1):
            myfile.write(revContent[i])
          else:
            myfile.write(revContent[i] + '\n') # write desired output to file
      except (FileNotFoundError, TypeError, OSError) as e:
        print(type(e),e)
        fileName = input("Please enter a valid file name: ")
      else:
        myfile.close()
        break
  
  #bonus
  def upper(self,fileName):
    while True:
      try:
        myfile = open(fileName, 'w') # Open a file for writing
        upperContent = [x.strip().upper() for x in self.contents]
        for i in range(len(upperContent)):
          if i == (len(upperContent)-1):
            myfile.write(upperContent[i])
          else:
            myfile.write(upperContent[i] + '\n') # write desired output to file
      except (FileNotFoundError, TypeError, OSError) as e:
        print(type(e),e)
        fileName = input("Please enter a valid file name: ")
      else:
        myfile.close()
        break
        

f = FileManipulator("tm.txt")
print(f.contents)
f.reverse("tmp2.txt")
f.upper("tmp3.txt")