In [1]:

    

pwd


    

    




/Users/mbp/Documents/my-project/python-snippets/notebook

In [2]:

    

python3 data/src/file_path.py


    

    




getcwd:       /Users/mbp/Documents/my-project/python-snippets/notebook
__file__:     data/src/file_path.py
basename:     file_path.py
dirname:      data/src
abspath:      /Users/mbp/Documents/my-project/python-snippets/notebook/data/src/file_path.py
abs dirname:  /Users/mbp/Documents/my-project/python-snippets/notebook/data/src

[set target path 1]
target_path_1:  data/src/test.txt
read target file:
line 1
line 2
line 3

[set target path 2]
target_path_2:  data/src/../dst/test_new.json
read target file:
{
  "A": 100,
  "B": "abc",
  "C": "あいうえお"
}

[change directory]
getcwd:       /Users/mbp/Documents/my-project/python-snippets/notebook/data/src

[set target path 1 (after chdir)]
target_path_1:  test.txt
read target file:
line 1
line 2
line 3

[set target path 2 (after chdir)]
target_path_2:  ../dst/test_new.json
read target file:
{
  "A": 100,
  "B": "abc",
  "C": "あいうえお"
}

In [3]:

    

cd data/src


    

In [4]:

    

python3 file_path.py


    

    




getcwd:       /Users/mbp/Documents/my-project/python-snippets/notebook/data/src
__file__:     file_path.py
basename:     file_path.py
dirname:      
abspath:      /Users/mbp/Documents/my-project/python-snippets/notebook/data/src/file_path.py
abs dirname:  /Users/mbp/Documents/my-project/python-snippets/notebook/data/src

[set target path 1]
target_path_1:  test.txt
read target file:
line 1
line 2
line 3

[set target path 2]
target_path_2:  ../dst/test_new.json
read target file:
{
  "A": 100,
  "B": "abc",
  "C": "あいうえお"
}

[change directory]
getcwd:       /Users/mbp/Documents/my-project/python-snippets/notebook/data/src

[set target path 1 (after chdir)]
target_path_1:  test.txt
read target file:
line 1
line 2
line 3

[set target path 2 (after chdir)]
target_path_2:  ../dst/test_new.json
read target file:
{
  "A": 100,
  "B": "abc",
  "C": "あいうえお"
}