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
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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
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