” and then “oh!” in rapid succession. We’re talking about serialization and deserialization with Python’s built-in `pickle` module.
Now, before I get into the details of this magical process, let me first explain what it means to serialize something. In programming terms, “serializing” refers to converting a data structure or object into a format that can be stored and transmitted easily. This is useful for all sorts of things saving data to disk, sending data over the network, etc.
And now, deserialization. Deserialization is essentially the opposite of serialization: it involves converting serialized data back into its original format. So if you serialize a Python object and then deserialize it later on, you should end up with an identical copy of that object.
So how do we go about doing this in Python? Well, as I mentioned earlier, the `pickle` module is our friend here. It’s built into Python, so there’s no need to install any external libraries or packages. Let me show you a quick example:
# Import the pickle module
import pickle
# Create a list to be serialized
my_list = [1, 2, 3]
# Open a file for writing and serialize the data using pickle.dump()
# 'wb' stands for write binary mode, which is used for writing serialized data
with open('data.pickle', 'wb') as f:
pickle.dump(my_list, f) # Serialize the list and write it to the file
# The serialized data is now stored in the file 'data.pickle'
In this example, we’re creating a list of numbers (`[1, 2, 3]`) and then using the `open()` function to open a file called “data.pickle” for writing in binary mode (`wb`). We’re then passing that file object to the `dump()` method from the `pickle` module, which serializes our list and writes it to the file.
Now let’s say we want to load this data back into memory:
# Open the serialized data for reading in binary mode (rb)
with open('data.pickle', 'rb') as f:
# Read the serialized data from the file and deserialize it using the `load()` method
my_list = pickle.load(f) # Load the serialized data from the file and assign it to the variable `my_list`
In this example, we’re opening our “data.pickle” file for reading in binary mode (`rb`) and then passing that file object to the `load()` method from the `pickle` module. This deserializes the data and returns it as a Python list.
That’s all there is to serializing and deserializing with Python’s built-in `pickle` module. It may seem like magic at first, but once you understand how it works, it becomes pretty straightforward.