Practice Projects

>Projects — cheat sheet

Reuse these small-program patterns to turn an idea into a working project one clear step at a time.

Plan the program

steps = ["get values", "calculate", "show result"]

Break a project into a short ordered plan.

result = 0
print(result)

Start with a tiny working version before adding features.

message = ""
if not message:
    print("Need a value")

Check simple invalid or missing data early.

total = 10
print(f"Total: {total}")

Show results with clear labels.

secret = 7
guess = 4

Keep the target and the current guess in named variables.

if guess == secret:
    print("Correct")

Compare a guess directly with the target.

if guess < secret:
    print("Too low")
else:
    print("Too high or correct")

Give feedback based on how two values compare.

attempts = 0
attempts += 1

Use a counter to track repeated tries.

bill = 48.0
tip_rate = 0.15
tip = bill * tip_rate

Store each part of a calculation in a clear variable.

total = bill + tip

Build a final result from smaller results.

people = 3
share = total / people

Divide a total only after choosing the group size.

print(f"Each person pays ${share:.2f}")

Format money with two decimal places.

text = "Python makes text useful"
words = text.lower().split()

Normalize and split text before analyzing it.

word_count = len(words)

Count words after splitting into a list.

letters = [letter for letter in text if letter.isalpha()]

Filter characters before counting letters.

counts = {}
for word in words:
    counts[word] = counts.get(word, 0) + 1

Use a dictionary to build a frequency count.

tasks = []
tasks.append("Practice Python")

Keep changing to-do items in a list.

for index, task in enumerate(tasks, start=1):
    print(index, task)

Display each task with a friendly number.

class Task:
    def __init__(self, title):
        self.title = title
        self.done = False

A class can group a task's data together.

def mark_done(task):
    task.done = True

Put one task action in a small named method or function.