Python Noob Questions (don't get mad I'm new)

[Draxalite]

So I'm learning python on the w3schools website between my part time jobs and there are some questions I have about certain things, for clarification. 

 

 

So I completed the syntax chapter on w3schools and codeacademy (im using both to better understand concepts from different perspectives). I was doing some fooling around and it was fun i have a question though. Why is this printing 2 texts? is it that i NEED another line?

 

# This code will cure covid-19 and save the world
"""
# I hope this works for multiline commenting, I'm not sure if it will but I really do hope it does. It could save the world! Why would a comment be this long anyways
"""
Atk = 10
Def = 50
HP = 100
Dmg = HP - (Atk - Def)
if Dmg < 1:
   print("Weakness... you have failed!")
if Dmg > 1 < 99:
  print("So you have worth...")     
if Dmg > 100:
   print("Nu- NUUUU~ haha I died NUUUUU~")  

 

Edited November 26, 2020 by Draxalite

[Kilrah]

It's a programming language, you can do anything you want with it. The "marketing babble" is pointless.

[WhitetailAni]

Python can be used with a Raspberry Pi to help you with your science fair project.

[Draxalite]

So I completed the syntax chapter on w3schools and codeacademy (im using both to better understand concepts from different perspectives). I was doing some fooling around and it was fun i have a question though. Why is this printing 2 texts? is it that i NEED another line?

 

# This code will cure covid-19 and save the world
"""
# I hope this works for multiline commenting, I'm not sure if it will but I really do hope it does. It could save the world! Why would a comment be this long anyways
"""
Atk = 10
Def = 50
HP = 100
Dmg = HP - (Atk - Def)
if Dmg < 1:
   print("Weakness... you have failed!")
if Dmg > 1 < 99:
  print("So you have worth...")     
if Dmg > 100:
   print("Nu- NUUUU~ haha I died NUUUUU~")  

 

[colonel_mortis]

(Please don't edit your post to completely change the meaning - it causes the previous posts not to have any context and make no sense. Instead, you can either post a new topic or just add a separate post with the new question (optionally editing the original one to mention that there's another question later or add a summary without removing the old content).)

 

The problem with your code looks like

if Dmg > 1 < 99:

Python does support range queries, but they aren't quite like that. Instead you need to reorder it, to be

if 1 < Dmg < 99:

 

What you had before is essentially equivalent to "Dmg > 1 and 1 < 99" rather than "Dmg > 1 and Dmg < 99" as you intended.

 

You probably also want to alter the bounds a bit - at the moment, it won't print anything for 1, 99 or 100.

 

A more standard way of writing this code would be

if Dmg < 1:
   print("Weakness... you have failed!")
elif Dmg < 100:
  print("So you have worth...")     
else:
   print("Nu- NUUUU~ haha I died NUUUUU~")  

That way you don't have to worry about getting the bounds to match correctly (elif means else if).

[Draxalite]

4 minutes ago, Sakuriru said:

"Dmg > 1 < 99" should be "Dmg > 1 and Dmg < 99"

it worked! how many times can you put and in a line?

[Kilrah]

As many as you want (aka until the whole thing is unreadable...)

[Draxalite]

Thanks for the help guys been really wonderful so far! I mentioned earlier that i was laerning from w3schools and codeacademy, well halfway through the introduction chapters codeacademy started asking me for a credit card. After some digging around i found out that i was on the pro course (the only course that teaches python 3 on that website) and the free version teaches python 2. What's the difference between python 2 and 3? Is there a good recommendation for another website i can learn python from for free?

[Alexeygridnev1993]

On 11/27/2020 at 1:44 PM, Draxalite said:

Thanks for the help guys been really wonderful so far! I mentioned earlier that i was laerning from w3schools and codeacademy, well halfway through the introduction chapters codeacademy started asking me for a credit card. After some digging around i found out that i was on the pro course (the only course that teaches python 3 on that website) and the free version teaches python 2. What's the difference between python 2 and 3? Is there a good recommendation for another website i can learn python from for free?

Don't bother to learn Python 2. It's like a zombee who should have died a decade ago but is somehow still sticking around It has been officially retired in April this year, so, it won't get any updates from the Python foundation (which means that all newly-found and unpatched security holes will make it unusable pretty quickly). You may still encounter some legacy Python 2 code at your future workplace but, as long as you know Python 3, maintaining Python 2 code won't be too complicated.

 

The main differences are some syntax differences, usage of Unicode by default in Python 3 and other small differences (which are, however, big enough to break backwards compatibility).

[codesidian]

On 11/27/2020 at 12:44 PM, Draxalite said:

Is there a good recommendation for another website i can learn python from for free?

Not so much a website to learn from but a really useful way to get valuable constructive criticism; Code review stack exchange. Another way to learn would be to pick up simple projects that "do something". I always found that creating things i enjoy or solving problems that i have keep me motivated to learn. Once you feel very comfortable writing simple scripts, gradually increase the scope and techniques involved. A quick search for simple python projects brought up this site. Which looks pretty good. You get a wide range of exposure.

 

Most importantly, have fun and don't take the learning process too seriously.