# Create an empty dictionary
m = {}

# Set key/value pairs using typical syntax
m["k1"] = 7
m["k2"] = 13

# Print the dictionary to show all of its key/value pairs
print("map:", m)

# Get a value for a key
v1 = m["k1"]
print("v1:", v1)

# If the key doesn’t exist, accessing it will raise a KeyError.
# Alternatively, you can use the get method to return None or a default value if the key doesn't exist.
v3 = m.get("k3", 0)
print("v3:", v3)

# len function returns the number of key/value pairs
print("len:", len(m))

# The del statement removes key/value pairs from a dictionary
del m["k2"]
print("map:", m)

# To remove all key/value pairs from a dictionary, you can use the clear method.
m.clear()
print("map:", m)

# The in keyword checks if the key was present in the dictionary.
prs = "k2" in m
print("prs:", prs)

# You can also declare and initialize a new dictionary in the same line with this syntax.
n = {"foo": 1, "bar": 2}
print("map:", n)

# Checking dictionary equality
n2 = {"foo": 1, "bar": 2}
if n == n2:
    print("n == n2")