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This is the community forum for my apps Pythonista and Editorial.
For individual support questions, you can also send an email. If you have a very short question or just want to say hello — I'm @olemoritz on Twitter.
@Karina the issue lies in line 22.
Since add_column is in the loop, it will get called plenty of times. This results in a lot of columns stacked on top of another, and it is very probable that at least once these columns has the maximum number boxes, and therefore the „smallest“ gap.
Just remove one of the indents in line 22 to fix this.
Btw, what @stephen said is certainly worth looking into, like just about any of his suggestions
@Bumbo-Cactoni I'm a bit late to the party, but you could always check out Cambidge IGCSE Computer Science past papers. Just search for them in your favourite search engine. They provide beginner level excercises and solutions, since the exams are aimed at students with 2 years of coding experience.
Just be aware that for every year, there's one paper with a coding excercise (the one you want) and one paper with theory (boring).
I had to pass this exam in 2018, just as an example
There's more here.
@stephen looking good! I always was a little too lazy to try them all out... and I’m not using scene much nowadays.
@stephen That’s how I understood him. And it worked out really well, after some minor adaptions
I was just playing around, and thought this might be useful to others as well. So I signed up to GitHub. Feelback (didn't know how else to call it, I know it's a bit cringey) makes it fairly easy to get vibrations and haptic feedback, assuming your device has a haptic engine built in.
The oldest supported iPhone is the 6s (mine), and it only works with a little workaround. I don't know which iPads work (my iPad mini 2 is just way too old), or if they have a haptic engine at all.
Does anyone know if there are other SystemSounds than these? Because even this list doesn't include the ids for haptic feedback (1519, 1520, 1521) , so there may be more.
@stephen thanks for the kind words, but some things are clumsy at best. Your summary is awesome, though. Although I am really glad that I can help here :) That way I can return at least a small amount of the support this community here has given me
This is an old and sometimes very poorly written clone I did to learn about ai (flappy bird is an awesome game for basic artificial intelligence experiments). I didn’t bother about graphics, but maybe it’s helpful to you.
Run this to play the game:
from scene import *
import sound
import random
import math
import gameExtension as extension
#import nnExtension as nn
A = Action
class MyScene (Scene):
def setup(self):
self.background_color = 'beige'
self.gravity = Vector2(0, -self.size.y/1500)
self.birds = []
self.running = True
extension.setup_walls(self)
extension.update_walls(self)
#self.birdCount = 1 #uncomment if using ai
for x in range(self.birdCount):
extension.add_bird(self)
pass
def did_change_size(self):
pass
def update(self):
if self.running:
self.running = False
extension.update_walls(self)
for bird in self.birds:
if bird.distance >= 10000: bird.dead = True
if not bird.dead:
self.running = True
extension.count_distance(self, bird)
extension.update_bird(self, bird)
bird.data = extension.get_data(self, bird)
if bird.position.y-bird.size.y/2 <= 0 or bird.position.y+bird.size.y/2 >= self.size.y:
bird.color = 'red'
bird.dead = True
for wall in self.walls:
if bird.frame.intersects(wall.frame):
bird.color = 'red'
bird.dead = True
else:
if bird.position.x + bird.size.x/2 >= 0:
bird.position = (bird.position.x - 1, bird.position.y)
def touch_began(self, touch):
self.birds[0].up = True
pass
def touch_moved(self, touch):
pass
def touch_ended(self, touch):
pass
if __name__ == '__main__':
run(MyScene(), PORTRAIT, show_fps=True)
Save this in the same folder as the upper main code as gameExtension.py
from scene import *
import random
def add_bird(self):
self.birds.append(ShapeNode(rect(0,0,10,10)))
bird = self.birds[len(self.birds)-1]
bird.color = 'black'
bird.size = (self.size.x/50, self.size.x/50)
bird.position = (self.size.x/4, self.size.y/2)
bird.z_position = 2
bird.dead = False
bird.distance = 0
bird.up = False
bird.max_fall_vel = Vector2(0, self.size.y/100)
bird.up_acc = Vector2(0, self.size.y/2)
bird.vel = Vector2(0, 0)
bird.acc = Vector2(0, 0)
bird.data = get_data(self, bird)
self.add_child(bird)
def setup_walls(self):
self.wall_distance = self.size.x/4
self.gap_size = self.size.y/6
self.wall_width = self.size.x/14
self.distance_to_next_wall = self.wall_distance + 1
self.walls = []
def count_distance(self, bird):
bird.distance = bird.distance + 1
def update_walls(self):
if self.distance_to_next_wall >= self.wall_distance:
self.distance_to_next_wall = 0
build_wall(self)
else: self.distance_to_next_wall = self.distance_to_next_wall+1
removal = []
for x in range(len(self.walls)):
wall = self.walls[x]
wall.position = (wall.position.x - 1, wall.position.y)
if wall.position.x + wall.size.x/2 < 0:
removal.append(x)
for x in range(len(removal)):
wallIndex = removal[x]-x
wall = self.walls[wallIndex]
wall.remove_from_parent()
self.walls.pop(wallIndex)
def build_wall(self):
posY = random.randint(round(self.gap_size/2), round(self.size.y - self.gap_size/2)) #random position of gap
self.walls.append(ShapeNode(rect(0,0,10,10))) #set up the upper wall
wall = self.walls[len(self.walls)-1]
wall.size = (self.wall_width, self.size.y - posY - self.gap_size/2)
wall.color = 'grey'
wall.position = (self.size.x + self.wall_width/2, self.size.y - wall.size.y/2)
wall.z_position = 1
self.add_child(wall)
self.walls.append(ShapeNode(rect(0,0,10,10))) #set up the lower wall
wall = self.walls[len(self.walls)-1]
wall.size = (self.wall_width, posY - self.gap_size/2)
wall.color = 'grey'
wall.position = (self.size.x + self.wall_width/2, wall.size.y/2)
wall.z_position = 1
self.add_child(wall)
def update_bird(self, bird):
if bird.up:
bird.up = False
bird.acc = bird.up_acc
else: bird.acc = self.gravity
bird.vel = bird.vel + bird.acc
if bird.vel[1] > bird.max_fall_vel[1]: bird.vel = bird.max_fall_vel
bird.position = bird.position + bird.vel
def get_data(self, bird):
data = []
for x in range(len(self.walls)):
wall = self.walls[x]
if wall.position.x + wall.size.x/2 >= bird.position.x - bird.size.x/2:
y_to_gap = (wall.position.x - wall.size.x/2) - (bird.position.x + bird.size.x/2)
if y_to_gap < 0: y_to_gap = 0
data.append(y_to_gap)
x_to_upper_wall = (wall.position.y - wall.size.y/2) - (bird.position.y + bird.size.y/2)
data.append(x_to_upper_wall)
wall = self.walls[x+1]
x_to_lower_wall = (wall.position.y + wall.size.y/2) - (bird.position.y - bird.size.y/2)
data.append(x_to_lower_wall)
break
distance_to_top = self.size.y - bird.position.y + bird.size.y/2
data.append(distance_to_top)
distance_to_bottom = bird.position.y - bird.size.y/2
data.append(distance_to_bottom)
velocity = bird.vel[1]
data.append(velocity)
return data
Im not even positive anyone is even wanting to follow the progress of this lol but just in case one person is here is change log 1 lol
Don’t sell yourself short😂 it’s always interesting to know what others are working on
@stephen True, I corrected it :) The code was a bit rushed 🤷♂️
As far as I've understood, you want some design feedback on these graphics, right?
Did you design these graphics yourself? If not, this might be a bit too detailed, sry
General feedback
Rune Stone
Common Sword
Short bow
Attributes:
spell book icon
barrel
mana potion
health icon
ruby garnets
That is music to my ears! My iPad Mini 2 broke down quite a while ago, and I also need a new laptop. Might just as well beat two birds with one stone. Btw, I finished school and study Mechatronics now :D
Any idea if ui applications work?
@Bumbo-Cactoni I'm a bit late to the party, but you could always check out Cambidge IGCSE Computer Science past papers. Just search for them in your favourite search engine. They provide beginner level excercises and solutions, since the exams are aimed at students with 2 years of coding experience.
Just be aware that for every year, there's one paper with a coding excercise (the one you want) and one paper with theory (boring).
I had to pass this exam in 2018, just as an example
There's more here.
@mikael said:
Could you try to strip down (a copy of) your code
Of course, no problem. It might take me one or two days, because I have exams coming up
Since I have absolutely no clue how I caused this error, the following will be rather unspecific, my apologies
So I have a very modified table view. Sometimes, when I remove some cell with the delete_rows() function, and then scroll down to see cells that weren’t displayed when deleting, some of these newly presented cells are totally blank. They simply are a white, empty area. I can tap them normally, and the proper functions are called. When I long press them (thanks to @mikael and his gestures script) I get the following error:
Traceback (most recent call last):
File "/private/var/mobile/Containers/Shared/AppGroup/D1D9102B-9BBB-4003-A835-39FDFDA39AB1/Pythonista3/Documents/v9/play_view.py", line 50, in skip_action
self.player.finished_handler()
File "/private/var/mobile/Containers/Shared/AppGroup/D1D9102B-9BBB-4003-A835-39FDFDA39AB1/Pythonista3/Documents/v9/audio_manager.py", line 72, in finished_handler
section = prev_cell.section
AttributeError: '_anonymous_label' object has no attribute 'section'
So what is an _anonymous_label, and how did I cause this?
I’m really sorry that I’m so unspecific, I simply have no idea how my (pretty long) code got to this
@Karina Yeah, we have a little “chicken house” and I wrote a script that opens and closes the door by turning on and off a motor. But that’s not the point :) I just needed an example to better illustrate the uses of threads
@Karina Now yes, threads may not always speed up your program. But they can keep your program responsive even though there’s some time consuming task being done. I also sometimes use them to constantly check if a variable changed, and then trigger a function. (There’s better ways to do that. But hey, I’m learning too.)
Even though this is in no way specific to Pythonista, let’s take a slight detour. Some time ago, I built a door manager for the chicken pen of my family (yeah, it’s a bit unusual). It opens and closes the door at given times, but also constantly checks a button and email for a manual overrides. Since the button needs to be checked every 0.1 seconds, but checking the email takes about 4 seconds (establishing a connection to the google servers takes some time), the button wouldn’t be checked while the code is trying to get the new email. This is solved with threads, so they get checked in parallel, not after each
Therefore the button stays responsive, even though checking mails uses up a lot of time
@Karina said:
I began to read about threads and sometimes don't understand what about this all, but in general understand. And for what here to use them? It encreases the speed of smth?
I certainly don’t know everything about threads either, but here’s my understanding of them.
The basics:
I think of threads like... well threads, as in strings or a thin rope. And when you open a thread, the code in this thread is run separated to other threads.
Thus Threads allow for separate codes to run “at the same time” (this technically isn’t possible, and is done through some tricks so that it appears so. Thus the quotation mark. But I’m not here to confuse you, so let’s go on)
Therefore you can have one section of code that (for example) has a time.sleep(100000) in it, and a thread that prints stuff in an infinite loop. Since they run in different threads, your code will still print stuff, even though there’s a stupidly long sleep statement in it
Edit If you want some coding examples, I can write you some with comments
@stephen looking good! I always was a little too lazy to try them all out... and I’m not using scene much nowadays.
@Karina I think you got me mixed up with @stephen :) And yes, I do prefer to fix the node‘s position manually.
My version of flappy bird I posted here some days ago is a good example. I used basic physics formulas to give the bird an acceleration, and then use that to calculate the bird‘s speed and thus position at a given time. Then adjusting the gravity and weight parameters made the motion feel “just right” (in my opinion).
Technical stuff aside, I just do it for greater control, so I can get the feeling of motions right.