add code for Nested Loops in Python tutorial

python-nested-loops/README.md

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+# Nested Loops in Python
+
+This folder provides the code examples for the Real Python tutorial [Nested Loops in Python](https://realpython.com/nested-loops-python/).

python-nested-loops/clock_analogy.py

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+for hour in range(0, 3):
+    for minute in range(0, 60):
+        print(f"{hour:02d}:{minute:02d}")

python-nested-loops/duplicate_check1.py

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+crew_ids = [1, 2, 8, 4, 5, 6, 7, 8, 9, 10]
+for i, first_id in enumerate(crew_ids):
+    for second_id in crew_ids[i + 1 :]:
+        if first_id == second_id:
+            print(f"Clone detected: id {first_id} is a duplicate.")

python-nested-loops/duplicate_check2.py

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+crew_ids = [1, 2, 8, 4, 5, 6, 7, 8, 9, 10]
+detected = set()
+for id in crew_ids:
+    if id in detected:
+        print(f"Clone found: id {id} is a duplicate.")
+    else:
+        detected.add(id)

python-nested-loops/duplicate_check3.py

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+from collections import Counter
+
+crew_ids = [1, 2, 8, 4, 5, 6, 7, 8, 9, 10]
+detected = Counter(crew_ids)
+for key, value in detected.items():
+    if value > 1:
+        print(f"Clone found: id {key} is a duplicate.")

python-nested-loops/multilist_sum.py

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+resource_donators = [[8, 6, 3], [9, 2, 7], [4, 1, 5]]
+total_resources = 0
+for planet in resource_donators:
+    for resource in planet:
+        total_resources += resource
+print(f"Total resources gotten for interstellar travels: {total_resources}")

python-nested-loops/multiplication_table.py

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+for multiplicant in range(1, 11):
+    for multiplier in range(1, 4):
+        expression = f"{multiplicant:>2d} × {multiplier}"
+        product = multiplicant * multiplier
+        print(f"{expression} = {product:>2d}", end="\t")
+    print()

python-nested-loops/nested_while.py

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+while True:
+    word = input("Enter a word (or type 'exit' to stop): ")
+
+    if word == "exit":
+        break
+
+    for letter in word:
+        print(letter)

python-nested-loops/pancake1.py

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+pancake_stacks = []
+bases = ["plain", "chocolate", "blueberry"]
+toppings = ["honey", "whipped cream", "alien syrup"]
+
+for base in bases:
+    for topping in toppings:
+        pancake_stacks.append(f"{base.capitalize()} pancake with {topping}")
+print(pancake_stacks)

python-nested-loops/pancake2.py

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+bases = ["plain", "chocolate", "blueberry"]
+toppings = ["honey", "whipped cream", "alien syrup"]
+
+pancake_stacks = [
+    f"{base.capitalize()} pancake with {topping}"
+    for base in bases
+    for topping in toppings
+]
+print(pancake_stacks)

python-nested-loops/pattern.py

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+height = 6
+sail_patterns = "*#-x+o"
+for row in range(height):
+    pattern = ""
+    spacing = " " * (height - row)
+    for symbol in sail_patterns:
+        pattern += symbol * row + spacing
+
+    print(pattern)

python-nested-loops/readability_challenge.py

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+living_quarters = 3
+sections = 2
+floors = 3
+
+for floor in range(floors):
+    for section in range(sections):
+        for living_quarter in range(living_quarters):
+            print(
+                f"Scanning quarter {living_quarter} in section {section} "
+                f"on floor {floor} for the intruder..."
+            )

python-nested-loops/sandwich1.py

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+blt_sandwich = [
+    ["bread", "lettuce", "tomato", "bacon"],
+    ["bread", "bacon", "lettuce", "tomato"],
+    ["bacon", "bacon", "tomato", "lettuce"],
+]
+target = "bacon"
+found = False
+for layer in blt_sandwich:
+    for ingredient in layer:
+        if ingredient == target:
+            print(f"Found the crispy {target}!")
+            found = True
+            break
+    if found:
+        print("Enjoying the crunch and worth it.")
+        break

python-nested-loops/sandwich2.py

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+blt_sandwich = [
+    ["bread", "lettuce", "tomato", "bacon"],
+    ["bread", "bacon", "lettuce", "tomato"],
+    ["bacon", "bacon", "tomato", "lettuce"],
+]
+target = "bacon"
+found = False
+for layer in blt_sandwich:
+    for ingredient in layer:
+        if ingredient != target:
+            print("This is not bacon. Skipping...")
+            continue
+        print(f"Found the crispy {target}!")
+        found = True
+        break
+
+    if found:
+        break
+print("Enjoying the crunch and worth it.")

python-nested-loops/space_ball.py

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+players = ["Bonnie", "Mike", "Raj", "Adah"]
+
+for player1 in players:
+    for player2 in players:
+        print(f"{player1} vs {player2}")

python-nested-loops/space_ball2.py

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+players = ["Bonnie", "Mike", "Raj", "Adah"]
+
+for player1 in players:
+    for player2 in players:
+        if player1 != player2:
+            print(f"{player1} vs {player2}")

python-nested-loops/variable_scoping.py

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+employees = [("Dorothy", "DevOps"), ("Abdel", "HR"), ("Nataliya", "DevOps")]
+departments = [
+    {"name": "DevOps", "city": "Berlin"},
+    {"name": "HR", "city": "Abuja"},
+]
+
+for name, department in employees:
+    for department in departments:
+        if department["name"] == department:
+            print(f"{name} works in {department['city']}")

python-nested-loops/variable_scoping_fix.py

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+employees = [("Dorothy", "DevOps"), ("Abdel", "HR"), ("Nataliya", "DevOps")]
+departments = [
+    {"name": "DevOps", "city": "Berlin"},
+    {"name": "HR", "city": "Abuja"},
+]
+
+for name, department in employees:
+    for dept in departments:
+        if dept["name"] == department:
+            print(f"{name} works in {dept['city']}")