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@tisnik
tisnik committed Oct 25, 2023
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---

### Transcrypt

* Transpiler Python -> JavaScript
- výsledný JS lze načíst do webové stránky
* Podpora DOM
* `print` na konzoli
- plus většina standardních funkcí Pythonu
* Malý runtime

---

### Základní datové typy (seznamy)

```python
x = [1, 2, 3, 4, 5]

x.append(99)

print(x)

for item in x:
print(item)
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-lists.py)

---

### Základní datové typy (seznamy)

```python
// Transcrypt'ed from Python, 2023-10-19 16:36:48
import {AssertionError, AttributeError, BaseException, DeprecationWarning, Exception, IndexError, IterableError, KeyError, NotImplementedError, RuntimeWarning, StopIteration, UserWarning, ValueError, Warning, __JsIterator__, __PyIterator__, __Terminal__, __add__, __and__, __call__, __class__, __envir__, __eq__, __floordiv__, __ge__, __get__, __getcm__, __getitem__, __getslice__, __getsm__, __gt__, __i__, __iadd__, __iand__, __idiv__, __ijsmod__, __ilshift__, __imatmul__, __imod__, __imul__, __in__, __init__, __ior__, __ipow__, __irshift__, __isub__, __ixor__, __jsUsePyNext__, __jsmod__, __k__, __kwargtrans__, __le__, __lshift__, __lt__, __matmul__, __mergefields__, __mergekwargtrans__, __mod__, __mul__, __ne__, __neg__, __nest__, __or__, __pow__, __pragma__, __pyUseJsNext__, __rshift__, __setitem__, __setproperty__, __setslice__, __sort__, __specialattrib__, __sub__, __super__, __t__, __terminal__, __truediv__, __withblock__, __xor__, abs, all, any, assert, bool, bytearray, bytes, callable, chr, copy, deepcopy, delattr, dict, dir, divmod, enumerate, filter, float, getattr, hasattr, input, int, isinstance, issubclass, len, list, map, max, min, object, ord, pow, print, property, py_TypeError, py_iter, py_metatype, py_next, py_reversed, py_typeof, range, repr, round, set, setattr, sorted, str, sum, tuple, zip} from './org.transcrypt.__runtime__.js';
var __name__ = '__main__';
export var x = [1, 2, 3, 4, 5];
x.append (99);
print (x);
for (var item of x) {
print (item);
}

//# sourceMappingURL=lists.map```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-lists.js)

---

### Základní datové typy (slovníky)

```python
x = {"foo": 1, "bar": 2, "baz": None}

print(x)

for key, value in enumerate(x):
print(key, value)
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-maps.py)

---

### Základní datové typy (slovníky)

```python
// Transcrypt'ed from Python, 2023-10-19 16:36:27
import {AssertionError, AttributeError, BaseException, DeprecationWarning, Exception, IndexError, IterableError, KeyError, NotImplementedError, RuntimeWarning, StopIteration, UserWarning, ValueError, Warning, __JsIterator__, __PyIterator__, __Terminal__, __add__, __and__, __call__, __class__, __envir__, __eq__, __floordiv__, __ge__, __get__, __getcm__, __getitem__, __getslice__, __getsm__, __gt__, __i__, __iadd__, __iand__, __idiv__, __ijsmod__, __ilshift__, __imatmul__, __imod__, __imul__, __in__, __init__, __ior__, __ipow__, __irshift__, __isub__, __ixor__, __jsUsePyNext__, __jsmod__, __k__, __kwargtrans__, __le__, __lshift__, __lt__, __matmul__, __mergefields__, __mergekwargtrans__, __mod__, __mul__, __ne__, __neg__, __nest__, __or__, __pow__, __pragma__, __pyUseJsNext__, __rshift__, __setitem__, __setproperty__, __setslice__, __sort__, __specialattrib__, __sub__, __super__, __t__, __terminal__, __truediv__, __withblock__, __xor__, abs, all, any, assert, bool, bytearray, bytes, callable, chr, copy, deepcopy, delattr, dict, dir, divmod, enumerate, filter, float, getattr, hasattr, input, int, isinstance, issubclass, len, list, map, max, min, object, ord, pow, print, property, py_TypeError, py_iter, py_metatype, py_next, py_reversed, py_typeof, range, repr, round, set, setattr, sorted, str, sum, tuple, zip} from './org.transcrypt.__runtime__.js';
var __name__ = '__main__';
export var x = dict ({'foo': 1, 'bar': 2, 'baz': null});
print (x);
for (var [key, value] of enumerate (x)) {
print (key, value);
}

//# sourceMappingURL=maps.map```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-maps.js)

---

### Funkce

```python
#!/usr/bin/env python3
# vim: set fileencoding=utf-8

#
# (C) Copyright 2023 Pavel Tisnovsky
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Eclipse Public License v1.0
# which accompanies this distribution, and is available at
# http://www.eclipse.org/legal/epl-v10.html
#
# Contributors:
# Pavel Tisnovsky
#

def add(a, b):
return a+b
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-adder.py)

---

### Funkce

```python
// Transcrypt'ed from Python, 2023-10-19 16:39:41
import {AssertionError, AttributeError, BaseException, DeprecationWarning, Exception, IndexError, IterableError, KeyError, NotImplementedError, RuntimeWarning, StopIteration, UserWarning, ValueError, Warning, __JsIterator__, __PyIterator__, __Terminal__, __add__, __and__, __call__, __class__, __envir__, __eq__, __floordiv__, __ge__, __get__, __getcm__, __getitem__, __getslice__, __getsm__, __gt__, __i__, __iadd__, __iand__, __idiv__, __ijsmod__, __ilshift__, __imatmul__, __imod__, __imul__, __in__, __init__, __ior__, __ipow__, __irshift__, __isub__, __ixor__, __jsUsePyNext__, __jsmod__, __k__, __kwargtrans__, __le__, __lshift__, __lt__, __matmul__, __mergefields__, __mergekwargtrans__, __mod__, __mul__, __ne__, __neg__, __nest__, __or__, __pow__, __pragma__, __pyUseJsNext__, __rshift__, __setitem__, __setproperty__, __setslice__, __sort__, __specialattrib__, __sub__, __super__, __t__, __terminal__, __truediv__, __withblock__, __xor__, abs, all, any, assert, bool, bytearray, bytes, callable, chr, copy, deepcopy, delattr, dict, dir, divmod, enumerate, filter, float, getattr, hasattr, input, int, isinstance, issubclass, len, list, map, max, min, object, ord, pow, print, property, py_TypeError, py_iter, py_metatype, py_next, py_reversed, py_typeof, range, repr, round, set, setattr, sorted, str, sum, tuple, zip} from './org.transcrypt.__runtime__.js';
var __name__ = '__main__';
export var add = function (a, b) {
return a + b;
};

//# sourceMappingURL=adder1.map```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-adder.js)

---

### Uzávěry

```python
def createCounter():
counter = 0
def next():
nonlocal counter
counter += 1
return counter
return next



#
# Spusteni testu.
#
def main():
counter1 = createCounter()
counter2 = createCounter()
for i in range(1,11):
result1 = counter1()
result2 = counter2()
print("Iteration #%d" % i)
print(" Counter1: %d" % result1)
print(" Counter2: %d" % result2)


main()
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-counter-closure.py)

---

### Uzávěry

```python
// Transcrypt'ed from Python, 2023-10-19 16:42:46
import {AssertionError, AttributeError, BaseException, DeprecationWarning, Exception, IndexError, IterableError, KeyError, NotImplementedError, RuntimeWarning, StopIteration, UserWarning, ValueError, Warning, __JsIterator__, __PyIterator__, __Terminal__, __add__, __and__, __call__, __class__, __envir__, __eq__, __floordiv__, __ge__, __get__, __getcm__, __getitem__, __getslice__, __getsm__, __gt__, __i__, __iadd__, __iand__, __idiv__, __ijsmod__, __ilshift__, __imatmul__, __imod__, __imul__, __in__, __init__, __ior__, __ipow__, __irshift__, __isub__, __ixor__, __jsUsePyNext__, __jsmod__, __k__, __kwargtrans__, __le__, __lshift__, __lt__, __matmul__, __mergefields__, __mergekwargtrans__, __mod__, __mul__, __ne__, __neg__, __nest__, __or__, __pow__, __pragma__, __pyUseJsNext__, __rshift__, __setitem__, __setproperty__, __setslice__, __sort__, __specialattrib__, __sub__, __super__, __t__, __terminal__, __truediv__, __withblock__, __xor__, abs, all, any, assert, bool, bytearray, bytes, callable, chr, copy, deepcopy, delattr, dict, dir, divmod, enumerate, filter, float, getattr, hasattr, input, int, isinstance, issubclass, len, list, map, max, min, object, ord, pow, print, property, py_TypeError, py_iter, py_metatype, py_next, py_reversed, py_typeof, range, repr, round, set, setattr, sorted, str, sum, tuple, zip} from './org.transcrypt.__runtime__.js';
var __name__ = '__main__';
export var createCounter = function () {
var counter = 0;
var py_next = function () {
counter++;
return counter;
};
return py_next;
};
export var main = function () {
var counter1 = createCounter ();
var counter2 = createCounter ();
for (var i = 1; i < 11; i++) {
var result1 = counter1 ();
var result2 = counter2 ();
print (__mod__ ('Iteration #%d', i));
print (__mod__ (' Counter1: %d', result1));
print (__mod__ (' Counter2: %d', result2));
}
};
main ();

//# sourceMappingURL=counter_closure.map```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-counter-closure.js)

---

### Komunikace s webovou stránkou

* Skript v Pythonu

```python
from itertools import chain

class SolarSystem:
planets = [list (chain (planet, (index + 1,))) for index, planet in enumerate ((
('Mercury', 'hot', 2240),
('Venus', 'sulphurous', 6052),
('Earth', 'fertile', 6378),
('Mars', 'reddish', 3397),
('Jupiter', 'stormy', 71492),
('Saturn', 'ringed', 60268),
('Uranus', 'cold', 25559),
('Neptune', 'very cold', 24766)
))]

lines = (
'{} is a {} planet',
'The radius of {} is {} km',
'{} is planet nr. {} counting from the sun'
)

def __init__ (self):
self.lineIndex = 0

def greet (self):
self.planet = self.planets [int (Math.random () * len (self.planets))]
document.getElementById ('greet') .innerHTML = 'Hello {}'.format (self.planet [0])
self.explain ()

def explain (self):
document.getElementById ('explain').innerHTML = (
self.lines [self.lineIndex] .format (self.planet [0], self.planet [self.lineIndex + 1])
)
self.lineIndex = (self.lineIndex + 1) % 3

solarSystem = SolarSystem ()
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-hello.py)

---

### Komunikace s webovou stránkou

* Výsledek transpřekladu

```python
// Transcrypt'ed from Python, 2023-10-19 16:43:26
import {AssertionError, AttributeError, BaseException, DeprecationWarning, Exception, IndexError, IterableError, KeyError, NotImplementedError, RuntimeWarning, StopIteration, UserWarning, ValueError, Warning, __JsIterator__, __PyIterator__, __Terminal__, __add__, __and__, __call__, __class__, __envir__, __eq__, __floordiv__, __ge__, __get__, __getcm__, __getitem__, __getslice__, __getsm__, __gt__, __i__, __iadd__, __iand__, __idiv__, __ijsmod__, __ilshift__, __imatmul__, __imod__, __imul__, __in__, __init__, __ior__, __ipow__, __irshift__, __isub__, __ixor__, __jsUsePyNext__, __jsmod__, __k__, __kwargtrans__, __le__, __lshift__, __lt__, __matmul__, __mergefields__, __mergekwargtrans__, __mod__, __mul__, __ne__, __neg__, __nest__, __or__, __pow__, __pragma__, __pyUseJsNext__, __rshift__, __setitem__, __setproperty__, __setslice__, __sort__, __specialattrib__, __sub__, __super__, __t__, __terminal__, __truediv__, __withblock__, __xor__, abs, all, any, assert, bool, bytearray, bytes, callable, chr, copy, deepcopy, delattr, dict, dir, divmod, enumerate, filter, float, getattr, hasattr, input, int, isinstance, issubclass, len, list, map, max, min, object, ord, pow, print, property, py_TypeError, py_iter, py_metatype, py_next, py_reversed, py_typeof, range, repr, round, set, setattr, sorted, str, sum, tuple, zip} from './org.transcrypt.__runtime__.js';
import {chain} from './itertools.js';
var __name__ = '__main__';
export var SolarSystem = __class__ ('SolarSystem', [object], {
__module__: __name__,
planets: (function () {
var __accu0__ = [];
for (var [index, planet] of enumerate (tuple ([tuple (['Mercury', 'hot', 2240]), tuple (['Venus', 'sulphurous', 6052]), tuple (['Earth', 'fertile', 6378]), tuple (['Mars', 'reddish', 3397]), tuple (['Jupiter', 'stormy', 71492]), tuple (['Saturn', 'ringed', 60268]), tuple (['Uranus', 'cold', 25559]), tuple (['Neptune', 'very cold', 24766])]))) {
__accu0__.append (list (chain (planet, tuple ([index + 1]))));
}
return __accu0__;
}) (),
lines: tuple (['{} is a {} planet', 'The radius of {} is {} km', '{} is planet nr. {} counting from the sun']),
get __init__ () {return __get__ (this, function (self) {
self.lineIndex = 0;
});},
get greet () {return __get__ (this, function (self) {
self.planet = self.planets [int (Math.random () * len (self.planets))];
document.getElementById ('greet').innerHTML = 'Hello {}'.format (self.planet [0]);
self.explain ();
});},
get explain () {return __get__ (this, function (self) {
document.getElementById ('explain').innerHTML = self.lines [self.lineIndex].format (self.planet [0], self.planet [self.lineIndex + 1]);
self.lineIndex = __mod__ (self.lineIndex + 1, 3);
});}
});
export var solarSystem = SolarSystem ();

//# sourceMappingURL=hello.map```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-hello.js)

---

### Kreslení na canvas

* Skript v Pythonu

```python
canvas = document.getElementById('canvas')
context = canvas.getContext('2d')

context.font = '60pt Arial'
context.fillStyle = 'darkblue'
context.strokeStyle = 'navyblue'

context.fillText('Hello Canvas', canvas.width / 2 - 210, canvas.height / 2 + 15)
context.strokeText('Hello Canvas', canvas.width / 2 - 210, canvas.height / 2 + 15)
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-canvas1.py)

---

### Kreslení na canvas

* Výsledek transpřekladu

```python
// Transcrypt'ed from Python, 2023-10-20 14:52:48
import {AssertionError, AttributeError, BaseException, DeprecationWarning, Exception, IndexError, IterableError, KeyError, NotImplementedError, RuntimeWarning, StopIteration, UserWarning, ValueError, Warning, __JsIterator__, __PyIterator__, __Terminal__, __add__, __and__, __call__, __class__, __envir__, __eq__, __floordiv__, __ge__, __get__, __getcm__, __getitem__, __getslice__, __getsm__, __gt__, __i__, __iadd__, __iand__, __idiv__, __ijsmod__, __ilshift__, __imatmul__, __imod__, __imul__, __in__, __init__, __ior__, __ipow__, __irshift__, __isub__, __ixor__, __jsUsePyNext__, __jsmod__, __k__, __kwargtrans__, __le__, __lshift__, __lt__, __matmul__, __mergefields__, __mergekwargtrans__, __mod__, __mul__, __ne__, __neg__, __nest__, __or__, __pow__, __pragma__, __pyUseJsNext__, __rshift__, __setitem__, __setproperty__, __setslice__, __sort__, __specialattrib__, __sub__, __super__, __t__, __terminal__, __truediv__, __withblock__, __xor__, abs, all, any, assert, bool, bytearray, bytes, callable, chr, copy, deepcopy, delattr, dict, dir, divmod, enumerate, filter, float, getattr, hasattr, input, int, isinstance, issubclass, len, list, map, max, min, object, ord, pow, print, property, py_TypeError, py_iter, py_metatype, py_next, py_reversed, py_typeof, range, repr, round, set, setattr, sorted, str, sum, tuple, zip} from './org.transcrypt.__runtime__.js';
var __name__ = '__main__';
export var canvas = document.getElementById ('canvas');
export var context = canvas.getContext ('2d');
context.font = '60pt Arial';
context.fillStyle = 'darkblue';
context.strokeStyle = 'navyblue';
context.fillText ('Hello Canvas', canvas.width / 2 - 210, canvas.height / 2 + 15);
context.strokeText ('Hello Canvas', canvas.width / 2 - 210, canvas.height / 2 + 15);

//# sourceMappingURL=canvas1.map```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-canvas1.js)

---

### Kreslení na canvas

* Podpůrná HTML stránka s canvasem

```python
<html>
<head>
<title>Canvas</title>
<style>
body {
background: #dddddd;
}

#canvas {
margin: 10px;
padding: 10px;
background: #ffffff;
border: thin inset #aaaaaa;
}
</style>
</head>
<body>
<canvas id='canvas' width='800' height='600'>Canvas not supported</canvas>
<script type="module">import * as canvas from "./__target__/transcrypt-canvas1.js";
</script>
</body>
</html>
```

[Zdrojový kód příkladu](https://github.com/tisnik/most-popular-python-libs/blob/master/modern_python/sources//transcrypt-canvas1.html)

---

# Alternativní projekty a jazyky

![Python](images/python.png)
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