Problems with Python syntax and Pygame

Question

I am developing a game and have encountered a few unsolvable (by me at least) issues.

Problems that I have with my code are:

When asking if you want to save a screenshot, only inputting anything which can be translated, by the lower() method, into either "yes" or "no" will be accepted despite the or statement - one of the conditions in that code block is if save_option.lower() == ("yes" or "y"): and it will only accept "yes", or else the condition is evaluated as False. I don't know why this is.
When rendering the introduction to the game in def introduction():, for some reason, each surface object is getting drawn twice. Here is what it looks like: However, when I increase the pixels moved every frame to 60, this happens:

When 'deliver all his presents' reaches the top of the screen, introduction() ends and the main game loop starts. I can see any logic error relating to this in this bit of code:

while not pygame.sprite.Group.has(intro_story_surface_objects): for event in pygame.event.get(): if event.type == QUIT or event.type == KEYDOWN and event.key
== K_ESCAPE: destroy()

DS.blit(BACKGROUND, (0, 0))
pygame.draw.rect(DS, (0, 0, 0, 50), (0, DISPLAY_HEIGHT - 200, DISPLAY_WIDTH, 200), 0) # (screen, color, (x,y,width,height), thickness)

count = 0
for line in intro_story_surface_objects:

    line_x_y = (intro_story_surface_objects[line].rect.x, intro_story_surface_objects[line].rect.y)
    intro_story_sprite_group.draw(DS)
    intro_story_surface_objects[line].rect.y -= 60 # intro_story_surface_objects[line].speed

    if intro_story_surface_objects[line].rect.y + intro_story_surface_objects[line].rect.height < 0:
        intro_story_surface_objects[line].kill()
        # print("Kill")
        line_kills += 1

        if line_kills == len(intro_story_surface_objects):
            return


pygame.display.update()
clock.tick(30)

Thanks again, in advance for trying to help.

From Kiran

Please ask only one question at a time. Also, make sure that your code is complete and verifiable, so that we can run and test it: stackoverflow.com/help/mcve — skrx
– skrx, Commented Mar 29, 2018 at 2:39
Is there anyone else that can help with pygame issues or even control flow as this might be the problem — Kiran
– Kiran, Commented Mar 29, 2018 at 13:29

Harry MW · Accepted Answer · 2018-04-02 17:23:21Z

3

For problem one. Try: if save_option.lower() in ['yes', 'y']:

What your or statement within the parens is saying is: If the first value evaluates to false, compare against the second. Since the string 'yes' is always True save_option.lower() is never compared against 'y'.

I can't help with the rest of it unfortunately. I haven't used Pygame. Good luck though! And happy gaming.

edited Apr 2, 2018 at 17:23

answered Mar 28, 2018 at 21:40

Harry MW

1341 silver badge10 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Kiran Over a year ago

Thanks for your help @Harry MW.

Kiran Over a year ago

At least you helped me solve one problem. I really appreciate it. :-)

Kiran · Accepted Answer · 2018-12-15 13:04:02Z

1

Answering my own question 2.

I still need 2 other questions answered apart from this.

When the code is executed, the text looks like it is being drawn twice. The problem is that every time that the x and y coordinates for each line of text are changed, the WHOLE list of lines what being drawn twice.

Just a little accident. My code was meant to be structured like this:

while there are lines of text:
draw all the lines in this command - intro_story_sprite_group.draw(DS)
loop through each line:
Change its (x, y)

Not do this:

while there are lines of text:
loop through each line:
draw all the lines in this command - intro_story_sprite_group.draw(DS)
Change its (x, y)

Please don't forget that I still need 2 more questions answered! Thanks for your help,

Kiran

edited Dec 15, 2018 at 13:04

answered Mar 31, 2018 at 17:38

Kiran

1173 silver badges10 bronze badges

Collectives™ on Stack Overflow

Problems with Python syntax and Pygame

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related