Python: What is the `csv` module?

1import csv
2
3# Reading CSV
4with open("data.csv", newline="") as f:
5    reader = csv.reader(f)
6    header = next(reader)  # Skip header
7    for row in reader:
8        print(row)  # ['Alice', '30', 'alice@example.com']
9
10# DictReader - access by column name
11with open("data.csv", newline="") as f:
12    reader = csv.DictReader(f)
13    for row in reader:
14        print(row["name"], row["age"])  # Alice 30
15
16# Writing CSV
17with open("output.csv", "w", newline="") as f:
18    writer = csv.writer(f)
19    writer.writerow(["name", "age", "email"])
20    writer.writerows([
21        ["Alice", 30, "alice@example.com"],
22        ["Bob", 25, "bob@example.com"],
23    ])
24
25# DictWriter - write by column name
26with open("output.csv", "w", newline="") as f:
27    writer = csv.DictWriter(f, fieldnames=["name", "age"])
28    writer.writeheader()
29    writer.writerow({"name": "Alice", "age": 30})