Python Operating System Services - Exercises, Practice, Solution
This resource offers a total of 90 Python OS Services problems for practice. It includes 18 main exercises, each accompanied by solutions, detailed explanations, and four related problems.
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1. OS Info and Directory Listing
Write a Python program to get the name of the operating system (Platform independent), information of the current operating system, current working directory, print files and directories in the current directory, and raise errors if the path or file name is invalid.
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2. List Directories and Files
Write a Python program to list only directories, files and all directories, files in a specified path.
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3. Directory Scanner
Write a Python program to scan a specified directory and identify the subdirectories and files.
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4. Path Access Checker
Write a Python program to check access to a specified path. Test the existence, readability, writability and executability of the specified path.
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5. File Metadata Fetcher
Write a Python program to get the size, permissions, owner, device, created, last modified and last accessed date and time of a specified path.
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6. Symbolic Link Creator
Write a Python program to create a symbolic link and read it to determine the original file pointed to by the link.
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7. File Creation and Renaming
Write a Python program to create a file and write some text and rename the file name.
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8. Process and User ID Operations
Write a Python program to find the parent's process ID, real user ID of the current process and change the real user ID.
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9. Change Directory Upwards
Write a Python program to retrieve the current working directory and change the dir (move up one).
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10. Environment Variables Access
Write a Python program to access environment variables and the value of the environment variable.
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11. Iterate Over Root Path
Write a Python program to iterate over a root level path and print all its sub-directories and files, as well as loop over specified dirs and files.
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12. Path Existence and Split
Write a Python program to test whether a given path exists or not. Find the filename and directory portion of the path if it exists.
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13. Join and Split Path Components
Write a Python program to join one or more path components together and split a given path into directories and files.
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14. Alter File Owner and Group
Write a Python program to alter the owner and the group ID of a specified file.
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15. File Mode Information
Write a Python program to get information about the file pertaining to file mode. Print the information - ID of device containing file, inode number, protection, number of hard links, user ID of owner, group ID of owner, total size (in bytes), time of last access, time of last modification and time of last status change.
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16. Buffer Write and Discard
Write a Python program to write a string to a buffer and retrieve the value written, at the end discard buffer memory.
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17. Run OS Command
Write a Python program to run an operating system command using the OS module.
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18. Replace Current Process
Write a Python program to start a new process replacing the current process.
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