Lab 7

  1. Create a Python script that does the following:
  • Takes a directory path and a file extension as command line arguments (use sys.argv).
  • Searches for all files with the given extension in the specified directory (use os module).
  • For each file found, read its contents and print them.
  • Implement exception handling for invalid directory paths, incorrect file extensions, and file access errors.

  1. Write a script using the os module that renames all files in a specified directory to have a sequential number prefix. For example, file1.txt, file2.txt, etc. Include error handling for cases like the directory not existing or files that can't be renamed.

  2. Create a Python script that calculates the total size of all files in a directory provided as a command line argument. The script should:

  • Use the sys module to read the directory path from the command line.
  • Utilize the os module to iterate through all the files in the given directory and its subdirectories.
  • Sum up the sizes of all files and display the total size in bytes.
  • Implement exception handling for cases like the directory not existing, permission errors, or other file access issues.
  1. Write a Python script that counts the number of files with each extension in a given directory. The script should:
  • Accept a directory path as a command line argument (using sys.argv).
  • Use the os module to list all files in the directory.
  • Count the number of files for each extension (e.g., .txt, .py, .jpg) and print out the counts.
  • Include error handling for scenarios such as the directory not being found, no read permissions, or the directory being empty.