Maps in Python

Based on the input, the target language is python. Below is the translation of the provided code and corresponding explanations in Python, following the provided structure and instructions.

Maps in Python are known as dictionaries. Here’s how you can work with dictionaries in Python.

# Create an empty dictionary using the dict() function.
m = dict()

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

# Printing a dictionary will show all 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, you can handle the default value using the get() method.
v3 = m.get("k3", 0)
print("v3:", v3)  # v3 will be 0 as "k3" is not in the dictionary.

# The built-in len() function returns the number of key/value pairs in the dictionary.
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, use the clear() method.
m.clear()
print("map:", m)

# The in keyword can be used to check if a key exists 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)

# Compare two dictionaries for equality.
n2 = {"foo": 1, "bar": 2}
if n == n2:
    print("n == n2")

To run the program, save the code in a file named maps.py and execute it using Python.

$ python maps.py 
map: {'k1': 7, 'k2': 13}
v1: 7
v3: 0
len: 2
map: {'k1': 7}
map: {}
prs: False
map: {'foo': 1, 'bar': 2}
n == n2

Now that we can run and build basic Python programs, let’s learn more about the language.

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Maps in Python