Python, made visible

Steptrace

See your Python run, step by step.

Write code, visualize each line, and master Python foundations through real coding drills.

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main.py

1 total = 0 2 for i in range(5): 3 total += i 4 print(total)

for loop · iter 3/5 line 3 · step 7 / 12

Visualization 1 · Flow

Visualization 1 Visualization 2 Visualization 3 Coding Practice

UPDATE

score = 72

line 1 · step 1 of 6

UPDATE

score = 85

line 2 · step 2 of 6

See every line, branch, loop, and variable change as it happens.

Solve Python foundation challenges by writing code, not clicking quizzes.

Save completed drills, attempts, and progress across sessions.