added object serialization tutorial

Author: x4nth055

README.md

@@ -50,6 +50,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
     - [How to Download Files in Python](https://www.thepythoncode.com/article/download-files-python). ([code](general/file-downloader))
     - [How to Compress and Decompress Files in Python](https://www.thepythoncode.com/article/compress-decompress-files-tarfile-python). ([code](general/compressing-files))
     - [How to Extract PDF Tables in Python](https://www.thepythoncode.com/article/extract-pdf-tables-in-python-camelot). ([code](general/pdf-table-extractor))
+    - [How to Use Pickle for Object Serialization in Python](https://www.thepythoncode.com/article/object-serialization-saving-and-loading-objects-using-pickle-python). ([code](general/object-serialization))
 
 - ### [Web Scraping](https://www.thepythoncode.com/topic/web-scraping)
     - [How to Access Wikipedia in Python](https://www.thepythoncode.com/article/access-wikipedia-python). ([code](web-scraping/wikipedia-extractor))

general/object-serialization/README.md

@@ -0,0 +1 @@
+# [How to Use Pickle for Object Serialization in Python](https://www.thepythoncode.com/article/object-serialization-saving-and-loading-objects-using-pickle-python)

general/object-serialization/save_data_structures.py

@@ -0,0 +1,16 @@
+import pickle
+
+# define any Python data structure including lists, sets, tuples, dicts, etc.
+l = list(range(10000))
+
+# save it to a file
+with open("list.pickle", "wb") as file:
+    pickle.dump(l, file)
+
+# load it again
+with open("list.pickle", "rb") as file:
+    unpickled_l = pickle.load(file)
+
+
+print("unpickled_l == l: ", unpickled_l == l)
+print("unpickled l is l: ", unpickled_l is l)

general/object-serialization/save_defined_objects.py

@@ -0,0 +1,25 @@
+import pickle
+
+class Person:
+    def __init__(self, first_name, last_name, age, gender):
+        self.first_name = first_name
+        self.last_name = last_name
+        self.age = age
+        self.gender = gender
+
+    def __str__(self):
+        return f"<Person name={self.first_name} {self.last_name}, age={self.age}, gender={self.gender}>"
+
+
+p = Person("John", "Doe", 99, "Male")
+
+# save the object
+with open("person.pickle", "wb") as file:
+    pickle.dump(p, file)
+
+# load the object
+with open("person.pickle", "rb") as file:
+    p2 = pickle.load(file)
+
+print(p)
+print(p2)

general/object-serialization/save_dumps.py

@@ -0,0 +1,30 @@
+import pickle
+
+
+class Person:
+    def __init__(self, first_name, last_name, age, gender):
+        self.first_name = first_name
+        self.last_name = last_name
+        self.age = age
+        self.gender = gender
+
+    def __str__(self):
+        return f"<Person name={self.first_name} {self.last_name}, age={self.age}, gender={self.gender}>"
+
+p = Person("John", "Doe", 99, "Male")
+
+# get the dumped bytes
+dumped_p = pickle.dumps(p)
+print(dumped_p)
+
+# write them to a file
+with open("person.pickle", "wb") as file:
+    file.write(dumped_p)
+
+# load it
+with open("person.pickle", "rb") as file:
+    p2 = pickle.loads(file.read())
+
+print(p)
+print(p2)
+