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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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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

Creates a dictionary with the same keys as the provided dictionary and values generated by running the provided function for each value:

Example:

def tips_map_values(obj, fn):
  ret = {}
  for key in obj.keys():
    ret[key] = fn(obj[key])
  return ret
users = {
  'Owen': { 'user': 'Owen', 'age': 29 },
  'Eddie': { 'user': 'Eddie', 'age': 15 }
}

print(tips_map_values(users, lambda u : u['age'])) # {'Owen': 29, 'Eddie': 15}

Output:

{'Owen': 29, 'Eddie': 15}