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Python: Copy of a deque object and verify the shallow copying process

Python Collections: Exercise-11 with Solution

Write a Python program to copy of a deque object and verify the shallow copying process.

Sample Solution:

Python Code:

import collections
tup1 = (1,3,5,7,9)
dq1 = collections.deque(tup1)
dq2 = dq1.copy()
print("Content of dq1:")
print(dq1)
print("dq2 id:")
print(id(dq1))
print("\nContent of dq2:")
print(dq2)
print("dq2 id:")
print(id(dq2))
print("\nChecking the first element of dq1 and dq2 are shallow copies:")
print(id(dq1[0]))
print(id(dq2[0]))

Sample Output:

Content of dq1:
deque([1, 3, 5, 7, 9])
dq2 id:
140706429557152

Content of dq2:
deque([1, 3, 5, 7, 9])
dq2 id:
140706406914152

Checking the first element of dq1 and dq2 are shallow copies:
11065888
11065888

Flowchart:

Python Collections: Copy of a deque object and verify the shallow copying process.

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Previous: Write a Python program to remove all the elements of a given deque object.
Next: Write a Python program to count the number of times a specific element presents in a deque object.

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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