abspath, chdir, basename, os.path.join

• abspath

- It returns the absolute path of current working directory with file name.

file_name = 'GFG.txt'
print(os.path.abspath(file_name)) 
>>>
/home/geeks/Desktop/gfg/GFG.txt

 

• chdir

Change directory.

file_name = 'GFG.txt'
os.chdir("/home/geeks/") 
print(os.path.abspath(file_name)) 
>>>
/home/geeks/GFG.txt #refer previous code

 

• basename

- It returns only the file name except for the parent path.

- Split by '/', return the last one.

- If it ends with '/', it returns an empty.

path = "/d/workspace/dir1/dir2/dir3"
print(f"[1] '{os.path.basename(path)}'")
>>>
[1] 'dir3'

path = "/d/workspace/dir1/dir2"
print(f"[2] '{os.path.basename(path)}'")
>>>
[2] 'dir2'

path = "/d/workspace/dir1/dir2/"
print(f"[3] '{os.path.basename(path)}'")
>>>
[3] ''

path = "/d/workspace/dir1/dir2/test.py"
print(f"[4] '{os.path.basename(path)}'")
>>>
[4] 'test.py'

 

• os.path.join

 

os.path.join(path, *paths)

 

• path: A path-like object representing a file system path. 
• *path: A path-like object representing a file system path. It represents the path components to be joined. A path-like object is either a string or bytes object representing a path.

 

The Method that joins one or more path components intelligently. This method concatenates various path components with exactly one directory separator (‘/’) following each non-empty part except the last path component. If the last path component to be joined is empty then a directory separator (‘/’) is put at the end. 

---

print("join(): " + os.path.join(os.path.abspath(os.path.dirname(__file__)), "file.py"))
>>>
join(): /Users/XXX/Desktop/os-path-join/file.py

 

• __file__ : Display the current file.
• os.path.dirname : Show the relative path
• os.path.abspath : Conver the path to an absolute path

---

join() considers it as a root if it contains a separate character ('/') in the directory.

 

print(os.path.join("dirA", "dirB", "/dirC"))
print(os.path.join("/dirA", "/dirB", "dirC"))
print(os.path.join("/dirA", "dirB", "dirC"))
>>>
/dirC
/dirB/dirC
/dirA/dirB/dirC

 

https://engineer-mole.tistory.com/188