Of course, here are the examples:

```python
# Initialize a list

my_list = [1, 2, 3, 4, 5]
print(my_list)

# Out: [1, 2, 3, 4, 5]
```

```python
# Append one value to the list

one_value = 6
my_list.append(one_value)

print(my_list)

# Out: [1, 2, 3, 4, 5, 6]
```

```python
# Extend the existing list with another list

list_of_extra_values = [7, 8, 9, 10]
my_list.extend(list_of_extra_values)

print(my_list)

# Out: [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
```
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