Python: getattr() function
getattr() function
The getattr() function returns the value of the named attribute of object and name must be a string.
Version
(Python 3.2.5)
Syntax:
getattr(object, name[, default])
Parameter:
Name | Description | Required / Optional |
---|---|---|
object | An object | Required |
name | String that contains the attribute's name. | Optional |
default | Value that is returned when the attribute is not found. | Optional |
Example: Python getattr() function
class Example:
Age = 55
Name = "Bishop"
Example = Example()
print('The age is:', getattr(Example, "Age"))
print('The name is:', Example.Name)
Output:
The age is: 55 The name is: Bishop
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Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
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