Python: Get the identity of an object
Python Basic: Exercise-93 with Solution
Write a Python program to get the Identity, Type, and Value of an object.
Sample Solution:
Python Code:
x = 34
print("\nIdentity: ",x)
print("\nType: ",type(x))
print("\nValue: ",id(x))
Sample Output:
Identity: 34 Type: <class 'int'> Value: 11066944
Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Check whether two objects are the same!
Python Code:
#Define two variables with some values
a = 34
b = 33
print('a = ',a)
print('b = ',b)
#Define another vairable c which is equal to a
c = a
print("Compare a and b:")
print(a is b)
print("\nMemory address of a:")
print(id(a))
print("Memory address of b:")
print(id(b))
print("\nCompare the said memory address:")
print(id(a) == id(b))
print("\nCompare b and c:")
print(b is c)
print("Memory address of c:")
print(id(c))
Sample Output:
a = 34 b = 33 Compare a and b: False Memory address of a: 11066944 Memory address of b: 11066912 Compare the said memory address: False Compare b and c: False Memory address of c: 11066944
Visualize Python code execution:
The following tool visualize what the computer is doing step-by-step as it executes the said program:
Python Code Editor:
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Python: Tips of the Day
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")
Ref: https://bit.ly/3fy0R6m
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