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Convert pseudocode to Python

Codoritmo translates your algorithm, written in pseudocode with PSeInt's syntax, into a Python program you can run. It's the most direct way to see that what you learned with Escribir, Leer, Si and Mientras is already programming.

Open this example and see its Python

Opens the program in Codoritmo; choose Python in View › Translate To.

The same algorithm in pseudocode and in Python

The “Guess the Number” example and the Python that Codoritmo generates for it, untouched.

Pseudocode

AdivinaNumero.psc · 33 lines
Algoritmo AdivinaNumero    Definir secreto, intento, intentos Como Entero    Definir acerto Como Logico    secreto <- Aleatorio(1, 100)    intentos <- 0    acerto <- Falso    Escribir "Pensé un número del 1 al 100. Tienes 7 intentos."    Mientras (NO acerto) Y intentos < 7 Hacer        intentos <- intentos + 1        Escribir "Intento ", intentos, ":"        Leer intento        Si intento = secreto Entonces            acerto <- Verdadero        SiNo            Si intento < secreto Entonces                Escribir Sin Saltar "Más alto"            SiNo                Escribir Sin Saltar "Más bajo"            FinSi            // Abs da la distancia sin importar el signo            Si Abs(intento - secreto) <= 5 Entonces                Escribir ", ¡estás muy cerca!"            SiNo                Escribir "..."            FinSi        FinSi    FinMientras    Si acerto Entonces        Escribir "¡Correcto! Lo lograste en ", intentos, " intentos."    SiNo        Escribir "Se acabaron los intentos. Era el ", secreto, "."    FinSiFinAlgoritmo

Python generated by Codoritmo

AdivinaNumero.py · 38 lines
# Este código fue generado por Codoritmo a partir del pseudocódigo.# Puede que no sea completamente correcto: revíselo antes de usarlo.import randomdef main():    secreto: int    intento: int    intentos: int    acerto: bool    secreto = random.randint(1, 100)    intentos = 0    acerto = False    print("Pensé un número del 1 al 100. Tienes 7 intentos.")    while (not acerto) and intentos < 7:        intentos = intentos + 1        print("Intento ", intentos, ":", sep="")        intento = int(input())        if intento == secreto:            acerto = True        else:            if intento < secreto:                print("Más alto", end="")            else:                print("Más bajo", end="")            if abs(intento - secreto) <= 5:                print(", ¡estás muy cerca!")            else:                print("...")    if acerto:        print("¡Correcto! Lo lograste en ", intentos, " intentos.", sep="")    else:        print("Se acabaron los intentos. Era el ", secreto, ".", sep="")if __name__ == "__main__":    main()

This is exactly the code Codoritmo generates for this program, including the comment at the top, which is always in Spanish.

How to translate your pseudocode to Python

  1. Write or open your algorithm

    It must be free of syntax errors; the Problems panel lists any.

  2. Choose Python

    In View › Translate To, choose Python. The code tab in the side panel shows the translation.

  3. Compare and copy

    The translation updates as you type. Copy it, or download it as .py with File › Export As.

  4. Run it

    With Python 3 installed, run python3 file.py in a terminal.

Open this example and see its Python

Opens the program in Codoritmo; choose Python in View › Translate To.

What the translation takes care of

PSeInt arrays start at 1 and Python lists at 0, so datos[i] becomes datos[i - 1]. If your profile uses 0-based arrays, the index stays the same.

A Para loop with fixed bounds becomes for … in range(…). When the bounds depend on variables, it becomes a while loop that works whether it counts up or down.

Where a result has to match PSeInt, the code includes small helper functions: MOD uses math.fmod to keep PSeInt's sign, for example, and real numbers are printed rounded to 10 decimals.

PSeInt names are case-insensitive, so the code writes every name in lowercase to make each use refer to the same variable.

How each instruction is translated

Each row is one PSeInt instruction translated by Codoritmo inside a program with integers n and i, a real x, a text nombre and an array datos[5]. The output is generated when this page is built.

InstructionPSeIntPython
Write (Escribir)
Escribir "Hola, ", nombre
print("Hola, ", nombre, sep="")
Write without a newline
Escribir Sin Saltar "Total: "
print("Total: ", end="")
Read an integer (Leer)
Leer n
n = int(input())
Read a real number
Leer x
x = float(input())
Random number
n <- Aleatorio(1, 6)
n = random.randint(1, 6)
If … else (Si … SiNo)
Si n MOD 2 = 0 Entonces
    Escribir "par"
SiNo
    Escribir "impar"
FinSi
if int(math.fmod(n, 2)) == 0:
    print("par")
else:
    print("impar")
Switch (Segun)
Segun n Hacer
    1: Escribir "uno"
    De Otro Modo: Escribir "otro"
FinSegun
if n == 1:
    print("uno")
else:
    print("otro")
While (Mientras)
Mientras n > 0 Hacer
    n <- n - 1
FinMientras
while n > 0:
    n = n - 1
Repeat … until (Repetir)
Repetir
    Leer n
Hasta Que n > 0
while True:
    n = int(input())
    if n > 0:
        break
For (Para)
Para i <- 1 Hasta 10 Hacer
    Escribir i
FinPara
for i in range(1, 11):
    print(i)
Array element
datos[1] <- n
datos[0] = n

Codoritmo and PSeInt desktop

PSeInt desktop also exports to other languages. These are the differences.

What Codoritmo adds

  • You see the translation next to the pseudocode, and it updates as you type.
  • It also exports to C#, PHP, Pascal, Visual Basic, QBasic, MatLab and HTML, like PSeInt.
  • The translation follows the chosen profile, such as 0-based or 1-based arrays.

What PSeInt desktop does that Codoritmo doesn't yet

  • Its exporter has many years of classroom use; Codoritmo's is newer, so review the code before you hand it in.

Codoritmo is an independent project, inspired by PSeInt and compatible with its syntax and school profiles. It is not PSeInt and is not affiliated with it. Official PSeInt website

Frequently asked questions

Does the generated Python run as is?

For class programs, yes: it runs on Python 3 unchanged. It's still worth reviewing, as the comment at the top says. If an instruction can't be translated, Codoritmo says so in a comment in the code.

Which Python version do I need?

Python 3.6 or later. The code uses type annotations such as n: int, which Python 2 doesn't have.

Can I convert Python back to pseudocode?

No. The translation goes one way, from pseudocode to Python.

Examples to try

Solved programs, each with its code, its flowchart and a sample run.

  • Guess the Number

    Guess a secret number from 1 to 100 in seven tries.

    Intermediate

  • Temperature Converter

    Converts degrees Celsius to Fahrenheit and Kelvin.

    Beginner

  • Palindromes

    Checks whether a phrase reads the same forwards and backwards.

    Intermediate

  • Bubble Sort

    Sorts random numbers by swapping neighbors, and stops as soon as they're in order.

    Intermediate

More Codoritmo tools

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