📖 Dictionary

# Dictionary banana
student = {
    "name":   "Rahul",
    "age":    20,
    "marks": 92.5
}
print(student["name"])    # Rahul
print(student["marks"])   # 92.5

# get() — safe access
print(student.get("age"))      # 20
print(student.get("email", "N/A")) # N/A

d = {"a":1, "b":2, "c":3}

print(d.keys())    # dict_keys(['a','b','c'])
print(d.values())  # dict_values([1,2,3])
print(d.items())   # dict_items([('a',1)...])

# Add/Update
d["d"] = 4         # add
d["a"] = 10        # update

# Delete
d.pop("b")         # b hatao
print(d)           # {'a':10, 'c':3, 'd':4}

phone_book = {
    "Rahul": "9876543210",
    "Priya": "9123456789",
    "Amit":  "9001234567"
}
for name, phone in phone_book.items():
    print(f"{name}: {phone}")

# Chapter 10: Dictionary — Advanced Practice
print("=== Dictionary Practice ===")

# Example 1: Basic usage
result = "Python mein Dictionary bahut powerful hai!"
print(result)

# Example 2: Real world use
data = ["Dictionary", "Python", "Hindi", "PythonHindi.in"]
for item in data:
    print(f"Item: {item}")

print("\nPractice complete! Great job! 🎉")

# Chapter 10: Dictionary — Advanced Examples
# Yeh code copy karo aur run karo!

# Example 1: Basic concept
print("=== Chapter 10: Dictionary ===")

# Example 2: List operations
items = ["Python", "Hindi", "Code", "Practice"]
for i, item in enumerate(items, 1):
    print(f"{i}. {item}")

# Example 3: Dictionary usage
chapter_info = {
    "number": 10,
    "title":  "Dictionary",
    "level":  "Beginner",
    "done":   False
}
for key, value in chapter_info.items():
    print(f"  {key:10}: {value}")

# Example 4: Function
def practice_summary(chapter, completed=False):
    status = "Complete ✅" if completed else "In Progress ⏳"
    return f"Chapter {chapter}: {status}"

print(practice_summary(10))
print(practice_summary(10, True))