Python Comments Examples

# Monthly report: totals per category
# Author: Asha

# --- data ---
spending = {"rent": 900, "food": 320, "travel": 85}

# --- calculation ---
total = sum(spending.values())

# --- output ---
print("Total spent:", total)

speed = 72        # km per hour
time = 2.5        # hours
distance = speed * time  # kilometres
print(distance)

values = [4, 8, 15]
total = sum(values)
# values.append(100)   # suspect: this made the total too large
average = total / len(values)
print(round(average, 2))

def apply_discount(price, code):
    # TODO: read discount codes from a file
    # FIXME: negative prices are not rejected yet
    if code == "SAVE10":
        return price * 0.9
    return price

print(apply_discount(50, "SAVE10"))

def to_celsius(fahrenheit):
    """Convert a Fahrenheit temperature to Celsius."""
    # 32 is the freezing point of water in Fahrenheit
    return round((fahrenheit - 32) * 5 / 9, 1)

print(to_celsius(212))
print(to_celsius.__doc__)

"""
This is only a string that is never used.
"""
print("The program still runs")
note = """This one is stored in a variable."""
print(len(note))