ErrorName: Window size

[jvlivz]

Hello all of you. My name is Julio and I am new in python. Today I want to post this because I have a big problem with my code and I can't find the real problem.
The code that I'm using in gedit is this:

from math import pi, sin

window_size(500, 500)
window_coordinates(-2*pi, -1.5, 2*pi, 1.5)

create_point(-2*pi, sin(-2*pi))
create_point(-1.5*pi, sin(-1.5*pi))
create_point(-pi, sin(-pi))
create_point(-0.5*pi, sin(-0.5*pi))
create_point(0, sin(0))
create_point(0.5*pi, sin(0.5*pi))
create_point(pi, sin(pi))
create_point(1.5*pi, sin(1.5*pi))
create_point(2*pi, sin(2*pi))

And the error that I get once I run the program on python console is the next:

Error:
Traceback (most recent call last):
File "ejemplo2.py", line 4, in <module>
window_size(500, 500)
NameError: name 'window_size' is not defined

I've been looking on the web any help to solve the problem but I still have not found any good support, hope you guys could help me to fix it.
thank's

[buran]

it looks like you want to use some GUI or plotting library. Which one?

[heiner55]

@buran:

See page 124 in book:
https://pythonizame.s3.amazonaws.com/med...b6ba01.pdf

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Maybe it could be PythonG
https://www3.uji.es/~dllorens/PythonG/

[buran]

@buran:

See page 124 in book:
https://pythonizame.s3.amazonaws.com/med...b6ba01.pdf

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Maybe it could be PythonG
https://www3.uji.es/~dllorens/PythonG/  

I think, instead of guessing, to wait for OP answer. In any case, there is third party library/package involved here. Probably you are right about PythonG

[Larz60+]

if window_size(500, 500) is supposed to be a tuple, it must be defined as:

window_size = (500, 500)

[heiner55]

@jvlizv
You can use matplotlib:

#!/usr/bin/python3
import numpy as np
import matplotlib.pyplot as plt

x = np.arange(0, 20, 0.1);
y = np.sin(x)
plt.plot(x, y)
plt.show()

[jvlivz]

@buran
So you are telling me that I need to install another kind of extention to make it work well?
sorry but As I told you I'm new learning python and I have not to much experience

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@heiner55

I already checked about pythonG but I couldn't install it. Would you mind to be more explicit please.

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@Larz60+
thanks I already tried in that way but is not working.

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@heiner55

Yeah thanks. It seems that is easier with matplot but I really want to know what's the reason of the error.

[buran]

first of all tell us where this code is coming from - I would guess in the source (book/online course, video tutorial, etc.) there is information what are the requirements.

[wavic]

Which GUI library should create the window?

[jvlivz]

first of all tell us where this code is coming from - I would guess in the source (book/online course, video tutorial, etc.) there is information what are the requirements.

ooh yes, sorry!!!!
the book is in Spanish and the name is "Introduccion a la Programacion Python" and the code comes from the page 124.
I have been working throught this book but at this point of the book they don't say if I have to install something else. It is suppose that the code should print some points from the sine function but as I told you at the beginning I'm new on this area.
Please if someone can give me any information I'll be very gratefull.

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Which GUI library should create the window?

I don't know, the name of the book is "Introducción a la Programación Python", but they don't mention anything about it. The page where the code comes from on the book is the page 124.