Re: [Tutor] Tkinter, how to retrieve information about an object on canvas
On 15/11/12 02:32, Matheus Soares da Silva wrote: Hello, I would like to be able to get information from a Tkinter canvas object. (color, width, tags, root points, etc), I wrote the following function that, with a canvas bind, returns me the widget that has been clicked on, the widget is returned as a tuple by the find_overlapping method. # detecting click def Hasclicked(e): global obj global lastClick lastClick = [e.x, e.y] obj = e.widget.find_overlapping(e.x, e.y, e.x, e.y) So, there's any method I can use on 'obj' to get the attributes? Do you want to get the attributes of the object within the canvas or of the canvas itself? I'm not quite clear from your description? In either case you can access an attribute of an object using standard Tkinter attribute access mechanism: obj['attributeName'] >>> import Tkinter as tk >>> top = Tk() >>> top = tk.Tk() >>> l = tk.Label(top,text='hello') >>> l.pack() >>> l['text'] 'hello' >>> HTH -- Alan G Author of the Learn to Program web site http://www.alan-g.me.uk/ ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] Plot multiple lines using python / basemap
Hi all: I have begun to learn about python / matplolib / basemap and really need some help. My data is in an Excel workbook with the following structure: Evento FechaLatitud Longitud Hora (UTC) 1 02/mayo 19,7 -95,2 0045 19,3 -95.3 0115 19,8 -95,6 0145 19,9 -96,6 0215 2 03/mayo 20,2 -99,6 0815 21,5 -99,80845 22,5 -99,90915 23,5 -100,0 0945 3 15/mayo 21,3 -118,92215 21,5 -118,7 2245 22,8 -120,3 2315 . .. . . . .. . . . .. . . How to open excel file in python? I would like to plot multiple line joining the positions of each of the events, it is possible to do this? Have any idea how to do it? The idea is to plot the trajectories on a particular region, for my case is Mexico. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tkinter, how to retrieve information about an object on canvas
Matheus Soares da Silva wrote:
> Hello, I would like to be able to get information from a Tkinter canvas
> object. (color, width, tags, root points, etc),
>
> I wrote the following function that, with a canvas bind, returns me the
> widget that has been clicked on, the widget is returned as a tuple by the
> find_overlapping method.
>
> # detecting click
> def Hasclicked(e):
> global obj
> global lastClick
> lastClick = [e.x, e.y]
> obj = e.widget.find_overlapping(e.x, e.y, e.x, e.y)
>
> So, there's any method I can use on 'obj' to get the attributes?
obj is a tuple of ids. You can use canvas.itemcget(id, attribute) to explore
the properties of the underlying objects
To get (for example) their fill-color:
for id in e.widget.find_overlapping(e.x, e.y, e.x, e.y):
print canvas.itemcget(id, "fill")
A complete example:
from __future__ import division
import Tkinter as tk
from math import cos, sin, pi
WIDTH = 640
HEIGHT = 480
root = tk.Tk()
canvas = tk.Canvas(root, width=WIDTH, height=HEIGHT)
canvas.pack()
var = tk.StringVar()
label = tk.Label(root, textvariable=var)
label.pack()
def canvas_click(event):
x, y = event.x, event.y
ids = canvas.find_overlapping(x, y, x, y)
clicked_colors = ", ".join(canvas.itemcget(id, "fill") for id in ids)
var.set(clicked_colors)
RADIUS = 100
R = 80
CX = WIDTH // 2
CY = HEIGHT // 2
phi = pi/2 # 90 degree
for color in "red", "green", "blue":
x = int(CX + R*cos(phi))
y = int(CY - R*sin(phi))
phi += pi*2/3 # 120 degree
canvas.create_oval(x-RADIUS, y-RADIUS, x+RADIUS, y+RADIUS, fill=color)
canvas.bind("", canvas_click)
root.mainloop()
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Re: [Tutor] Plot multiple lines using python / basemap
On 11/15/2012 04:20 AM, Boris Vladimir Comi wrote: > > Hi all: > > I have begun to learn about python / matplolib / basemap and really need some > help. > > My data is in an Excel workbook with the following structure: > > Evento FechaLatitud > Longitud Hora (UTC) > 1 02/mayo 19,7 > -95,2 0045 >19,3 > -95.3 0115 >19,8 > -95,6 0145 >19,9 > -96,6 0215 > > > 2 03/mayo 20,2 > -99,6 0815 > 21,5 > -99,80845 > 22,5 > -99,90915 > 23,5 > -100,0 0945 > > 3 15/mayo 21,3 > -118,92215 > 21,5 >-118,7 2245 > 22,8 >-120,3 2315 > > . .. >. > . > . .. >. > . > . .. >. > . > > > > > > > How to open excel file in python? >From Excel, save the file as a csv file, rather than a proprietary format. Then, within Python program, use the csv module, http://docs.python.org/2/library/csv.html The essential parts: import csv def getdata(filename): with open(filename, "rb") as infile: csvreader = csv.reader(infile, delimiter ="\t", quotechar='"') for row in csvreader: process row where row comes back as a list of items. You may have to play with the delimiter and quotechar, as I don't use Excel itself, to know what it defaults to. But a csv file is a text file, so it should be pretty obvious if you just look at the file with a text editor or viewer, what the separator and quote characters are. The quote character generally only matters if some field has an embedded separator or newline in it. > > I would like to plot multiple line joining the positions of each of the > events, it is possible to do this? Have any idea how to do it? Try matplotlib:http://pypi.python.org/pypi/matplotlib/1.1.0 It depends on numpy: http://numpy.scipy.org/ > > The idea is to plot the trajectories on a particular region, for my case is > Mexico. > -- DaveA ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Plot multiple lines using python / basemap
On 15/11/2012 09:20, Boris Vladimir Comi wrote: Hi all: I have begun to learn about python / matplolib / basemap and really need some help. How to open excel file in python? As Dave Angel has suggested save your data in csv format or use this http://www.python-excel.org/ I would like to plot multiple line joining the positions of each of the events, it is possible to do this? Have any idea how to do it? The matplotlib documentation is here http://matplotlib.org/contents.html and it's superb. As an added bonus matplotlib 1.2.0 has just been released and it supports Python 3, yee haa :) You might consider using matplotlib with IPython see http://ipython.org/, together they make a very powerful working environment. The idea is to plot the trajectories on a particular region, for my case is Mexico. -- Cheers. Mark Lawrence. ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
[Tutor] PostreSQL
Hi folks, Here are to listings of Python interfaces to PostgreSQL: Postgres wiki: http://wiki.postgresql.org/wiki/Python Python wiki: http://wiki.python.org/moin/PostgreSQL I have Python 3.2.3. Does anybody have experiences with these modules? Which is worth to use? Any point of view to compare them? Thanks, Péter ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] PostreSQL
Two listings, of course. :-) I failed to tell that my PG version is "PostgreSQL 8.1.2" (and my client uses Windows 7, if this has relevance). 2012/11/15 Válas Péter > Hi folks, > > Here are to listings of Python interfaces to PostgreSQL: > Postgres wiki: http://wiki.postgresql.org/wiki/Python > Python wiki: http://wiki.python.org/moin/PostgreSQL > > I have Python 3.2.3. > Does anybody have experiences with these modules? Which is worth to use? > Any point of view to compare them? > > Thanks, Péter > ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
Re: [Tutor] Tkinter, how to retrieve information about an object on canvas
2012/11/15 Peter Otten <__pete...@web.de>
> Matheus Soares da Silva wrote:
>
> > Hello, I would like to be able to get information from a Tkinter canvas
> > object. (color, width, tags, root points, etc),
> >
> > I wrote the following function that, with a canvas bind, returns me the
> > widget that has been clicked on, the widget is returned as a tuple by the
> > find_overlapping method.
> >
> > # detecting click
> > def Hasclicked(e):
> > global obj
> > global lastClick
> > lastClick = [e.x, e.y]
> > obj = e.widget.find_overlapping(e.x, e.y, e.x, e.y)
> >
> > So, there's any method I can use on 'obj' to get the attributes?
>
> obj is a tuple of ids. You can use canvas.itemcget(id, attribute) to
> explore
> the properties of the underlying objects
>
> To get (for example) their fill-color:
>
> for id in e.widget.find_overlapping(e.x, e.y, e.x, e.y):
> print canvas.itemcget(id, "fill")
>
> A complete example:
>
> from __future__ import division
> import Tkinter as tk
> from math import cos, sin, pi
>
> WIDTH = 640
> HEIGHT = 480
>
> root = tk.Tk()
> canvas = tk.Canvas(root, width=WIDTH, height=HEIGHT)
> canvas.pack()
>
> var = tk.StringVar()
> label = tk.Label(root, textvariable=var)
> label.pack()
>
> def canvas_click(event):
> x, y = event.x, event.y
> ids = canvas.find_overlapping(x, y, x, y)
> clicked_colors = ", ".join(canvas.itemcget(id, "fill") for id in ids)
> var.set(clicked_colors)
>
> RADIUS = 100
> R = 80
> CX = WIDTH // 2
> CY = HEIGHT // 2
>
> phi = pi/2 # 90 degree
> for color in "red", "green", "blue":
> x = int(CX + R*cos(phi))
> y = int(CY - R*sin(phi))
> phi += pi*2/3 # 120 degree
>
> canvas.create_oval(x-RADIUS, y-RADIUS, x+RADIUS, y+RADIUS, fill=color)
>
> canvas.bind("", canvas_click)
> root.mainloop()
>
>
> ___
> Tutor maillist - Tutor@python.org
> To unsubscribe or change subscription options:
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>
Thank you, just what I needed.
___
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Re: [Tutor] PostreSQL
Psycopg2 is the driver for postgres. Not sure if it is py3k compliant On Nov 15, 2012 6:13 AM, "Válas Péter" wrote: > Two listings, of course. :-) > I failed to tell that my PG version is "PostgreSQL 8.1.2" (and my client > uses Windows 7, if this has relevance). > > 2012/11/15 Válas Péter > >> Hi folks, >> >> Here are to listings of Python interfaces to PostgreSQL: >> Postgres wiki: http://wiki.postgresql.org/wiki/Python >> Python wiki: http://wiki.python.org/moin/PostgreSQL >> >> I have Python 3.2.3. >> Does anybody have experiences with these modules? Which is worth to use? >> Any point of view to compare them? >> >> Thanks, Péter >> > > > ___ > Tutor maillist - Tutor@python.org > To unsubscribe or change subscription options: > http://mail.python.org/mailman/listinfo/tutor > > ___ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
