#Helina Hailu #January 9, 2022 #I learned to identify the platform running a Python script, get the current working directory, change the current working directory, list the content of the current working directory, create a new directory, remove a directory, rename files and directories, recognize the difference between relative and absolute paths, test whether a path exists, andtest whether a specific file or directory exists #I had no difficulty completing this activity

# ************** DO NOT MODIFY OR ADD ANYTHING TO THIS CODE SEGMENT *********** # ************** Click Edit> Clear All Outputs *********** # ************** This code segment must be run before attempting any of the tasks or examples in this lesson ******************** # ************** This cell is a reset cell to remove (if they exist) the parent_dir and any children or leaves # It prepares the directories and files necessary to run the examples and complete the tasks. # This cell can be run first then all others cells in this notebook can be run, then this cell can be rerun # This is the reset. It uses the import shutil (or shell utility) which you will learn later in the course import os, shutil # shutil = shell utility has an important method called rmtree() # linux does not have an equivalent command! # Navigate to `library` directory (if not already in it) current_path = os.getcwd() print(current_path) if ("content" in current_path): #JGif ("library" in current_path): nb_path = current_path.split("content")[0] # nb_path = the 1st item in the split list else: nb_path = current_path print("Changing working dir to directory above parent_dir") os.chdir(os.path.join(nb_path,"content")) current_path = os.getcwd() print("Current working directory:", current_path) if (os.path.exists('parent_dir') == True): shutil.rmtree('parent_dir') os.mkdir('parent_dir') os.chdir('parent_dir') file_path = "./parent_leaf.txt" f = open(file_path, 'w') f.close() file_path = "./text_file.txt" f = open(file_path, 'w') f.close() os.mkdir('child1_dir') os.chdir('child1_dir') file_path = "./leaf1.txt" f = open(file_path, 'w') f.close() os.chdir('../') os.mkdir('child2_dir') os.chdir('child2_dir') file_path = "./leaf2.txt" f = open(file_path, 'w') f.close() os.chdir('../..') current_path = os.getcwd() print("Current working directory:", current_path)

import sys print(sys.platform)

import os # Change the current working directory to parent dir os.chdir('parent_dir') print('Changed working dir to parent: ', os.getcwd()) # Change the current working directory to child1 dir os.chdir('child1_dir') print('Changed working dir to child1: ', os.getcwd()) # Change the current working directory back to the parent dir os.chdir('..') print('Changed working dir back to parent: ', os.getcwd())

import os # Print the current working directory (should be "parent_dir") print('The current working directory is:', os.getcwd()) # List the content of the directory (both files and other directories) print('Current directory content: ', os.listdir())

import os # Print the current working directory (should be "parent_dir") print('The current working directory is:', os.getcwd()) # Create a new directory os.mkdir('new_child') print('Created new_child dir') # List the content of the directory print('Current directory content: ', os.listdir()) # Remove the new child directory os.rmdir('new_child') print('Removed new_child dir') # List the content of the directory print('Current directory content: ', os.listdir())

import os # Print the current working directory (should be "parent_dir") print('The current working directory is:', os.getcwd()) # Create a new directory os.mkdir('new_child') print('Created new_child dir') # List the content of the directory print('Current directory content:', os.listdir()) # Rename new_child as old_child os.rename('new_child', 'old_child') print('Renamed new_child as old_child') # List the content of the dir print('Current directory content: ', os.listdir()) # Remove the old_child dir os.rmdir('old_child') print('Removed old_child dir') print('Current directory content: ', os.listdir())

# [ ] Write a program to: # 1) Prompt the user for a directory name # 2) Create the directory # 3) Verify the directory was created by listing the content of the current working directory # 4) Remove the created directory # 5) Verify the directory was removed by listing the content of the current working directory import os dir_name = input("Enter a directory(file) name:") os.mkdir(dir_name) print('Current directory content: ', os.listdir()) os.rmdir(dir_name) print('Current directory content: ', os.listdir())

# [ ] Write a program to: # 1) Create a directory called "my_dir" # 2) Change the current working directory to "my_dir" # 3) Verify you are in the correct directory by displaying the current working directory # 4) Change the working directory back to the parent directory # 5) Verify you are in the correct directory by displaying the current working directory # 6) Rename "my_dir" to "your_dir" # 7) Verify the directory was renamed by listing the content of the current working directory # 8) Remove "your_dir" # 9) Verify the directory was removed by listing the content of the current working directory import os os.mkdir("my_dir") os.chdir("my_dir") print('The current working directory is:', os.getcwd()) os.chdir("/work") print('The current working directory is:', os.getcwd()) os.rename("my_dir", "your_dir") print('Current directory content: ', os.listdir()) os.rmdir("your_dir") print('Current directory content: ', os.listdir())

import os, os.path # Print the current working directory (should be "parent_dir") print('The current working directory is:', os.getcwd()) print(os.path) # Find the absolute path to child1_dir/leaf1.txt abs_path = os.path.abspath("child1_dir/leaf1.txt") print("Absolute path to leaf1.txt is: ", abs_path) # Test whether the path exists if(os.path.exists(abs_path)): print("Path exists") # Test to see if it's a file or directory if(os.path.isfile(abs_path)): print("It's a file") elif (os.path.isdir(abs_path)): print("It's a dir") else: print("Path doesn't exist")

# [ ] Write a program that prompts the user for a file or directory name # then prints a message verifying if it exists in the current working directory import os.path name = input("please enter a file or directory name: ") if (os.path.exists(name)): print("the file or directory exists in th current working directory") else: print("the file or directory does not exist in the current working directory")

# [ ] Write a program to print the absolute path of all directories in "parent_dir" # HINTS: # 1) Verify you are inside "parent_dir" using os.getcwd() # 2) Use os.listdir() to get a list of files and directories in "parent_dir" # 3) Iterate over the elements of the list and print the absolute paths of all the directories import os, os.path print("the current working directory is: ",os.getcwd()) listOffFilesDir=os.listdir() for item in listOffFilesDir: if(os.path.exists(item)): print(os.path.abspath(item))