Update README.md

Author: FengzihangCode

README.md

@@ -27,17 +27,38 @@ python setup.py install
 ```python
 import usf
 
-data = usf.read("schedule.usf")
-if usf.is_valid(data):
-    print("Valid USF file")
-    subjects = usf.get_subjects(data)
-    print(subjects)
+# Initialize the USF Parser with the file path
+parser = usf.USFParser("schedule.usf")
+
+# Get subjects from the parsed data
+subjects = parser.get_subjects()
+print(subjects)
+
+# Get periods
+periods = parser.get_periods()
+print(periods)
+
+# Get the timetable
+timetable = parser.get_timetable()
+print(timetable)
+```
+
+### Validating a USF file
+```python
+import usf
+
+# Initialize the USF Validator with a schema file
+validator = usf.USFValidator("schema.json")
+
+# Validate the parsed data
+if validator.validate(data):
+    print("Valid USF data")
 else:
-    print("Invalid USF file")
+    print("Invalid USF data")
 ```
 
 ### Creating a USF file
-```python
+···python
 import usf
 
 # Initialize the USF Generator (version 1 by default)
@@ -57,31 +78,45 @@ usf_generator.add_schedule(day=2, week_type="odd", subject="Physics", period_ind
 
 # Generate the USF data and save it to a file
 usf_generator.save_to_file("schedule.usf")
-```
+···
 
 ### Adding a Course to an Existing USF File
 ```python
+import usf
+
+# Initialize the USF Parser
 data = usf.read("schedule.usf")
+
+# Add a new subject
 usf.add_subject(data, {
     "name": "Physics",
     "teacher": "Prof. Johnson",
     "location": "Room 203",
-    "time": [(3, 4)],
+    "time": [3, 4],
     "week": "odd"
 })
+
+# Save the updated schedule
 usf.save(data, "updated_schedule.usf")
 ```
 
 ### Generating a USF File from Scratch
 ```python
+import usf
+
+# Initialize the USF Generator
 schedule = usf.create()
+
+# Add a subject
 usf.add_subject(schedule, {
     "name": "Computer Science",
     "teacher": "Ms. Lee",
     "location": "Lab 2",
-    "time": [(5, 6)],
+    "time": [5, 6],
     "week": "even"
 })
+
+# Save the new schedule
 usf.save(schedule, "new_schedule.usf")
 ```