ทุกฟังก์ชันมี Built-in Attribute __doc__ คืน Docstring ที่นิยามใน Source Code ของฟังก์ชัน
def foo():
""" This is an example of how a doc_string looks like.
This string gives useful information about the function being defined. """
pass
print(foo.__doc__)
ผลลัพธ์:
This is an example of how a doc_string looks like.
This string gives useful information about the function being defined.