deep copy list

---

examples/modules/copy_list.py

a = [
    {
      'name': 'Joe',
      'email': 'joe@examples.com',
    },
    {
      'name': 'Mary',
      'email': 'mary@examples.com',
    },
]


b = a
a[0]['phone'] = '1234'
a[0]['name'] = 'Jane'
a.append({
    'name': 'George'
})

print(a)
print(b)

[{'name': 'Jane', 'email': 'joe@examples.com', 'phone': '1234'}, {'name': 'Mary', 'email': 'mary@examples.com'}, {'name': 'George'}]
[{'name': 'Jane', 'email': 'joe@examples.com', 'phone': '1234'}, {'name': 'Mary', 'email': 'mary@examples.com'}, {'name': 'George'}]

examples/modules/shallow_copy_list.py

a = [
    {
      'name': 'Joe',
      'email': 'joe@examples.com',
    },
    {
      'name': 'Mary',
      'email': 'mary@examples.com',
    },
]


b = a[:]
a[0]['phone'] = '1234'
a[0]['name'] = 'Jane'
a.append({
    'name': 'George'
})

print(a)
print(b)

[{'name': 'Jane', 'email': 'joe@examples.com', 'phone': '1234'}, {'name': 'Mary', 'email': 'mary@examples.com'}, {'name': 'George'}]
[{'name': 'Jane', 'email': 'joe@examples.com', 'phone': '1234'}, {'name': 'Mary', 'email': 'mary@examples.com'}]

examples/modules/deep_copy_list.py

from copy import deepcopy

a = [
    {
      'name': 'Joe',
      'email': 'joe@examples.com',
    },
    {
      'name': 'Mary',
      'email': 'mary@examples.com',
    },
]


b = deepcopy(a)
a[0]['phone'] = '1234'
a[0]['name'] = 'Jane'
a.append({
    'name': 'George'
})

print(a)
print(b)

[{'name': 'Jane', 'email': 'joe@examples.com', 'phone': '1234'}, {'name': 'Mary', 'email': 'mary@examples.com'}, {'name': 'George'}]
[{'name': 'Joe', 'email': 'joe@examples.com'}, {'name': 'Mary', 'email': 'mary@examples.com'}]