Re: [web2py] embed image from variable
Thank you Massimo. Everything is working now. I misunderstood something.
Michele, thanks for the tip!
On Thursday, October 31, 2013 1:50:02 PM UTC-4, Michele Comitini wrote:
Maybe you want embed in html which is much cooler it requires only one
single request/response:
def index():
form = SQLFORM.factory(Field('x')).process()
img64 = None
if form.accepted:
img = myplotfunction(form.vars.x)
img64 = embed64(data=img,extension='image/png') # - ! if img not
png then change extension !
return locals()
{{=form}}
{{if form.accepted:}}
img src={{=img64}} /
{{pass}}
2013/10/31 Massimo Di Pierro massimo@gmail.com javascript:
Not sure I understand. You have every piece you need.
def index():
form = SQLFORM.factory(Field('x')).process()
return locals()
and in index.html()
{{=form}}
{{if form.accepted:}}
img src={{=URL(f='myplotfunction'**, vars=dict(myvar=**
form.vars.x))}}/
{{pass}}
On Wednesday, 30 October 2013 14:55:50 UTC-5, Josh Myers wrote:
I have all this working the same way as Massimo suggested with
matplotlib, no problems.
But, I can't for the life of me figure out how to pass a variable into
the controller plot function from the view. This would be so I can, for
example, ask the user to choose a variable through a form and then produce
a histogram of that variable with matplotlib. Right now I have it working
but only if the variable for the histogram is preset in the controller plot
function.
I tried to set the variable with request.vars like so:
img src={{=URL(f='myplotfunction'**, vars=dict(myvar=**
userselectedvar))}}/
And then simply use request.vars.myvar in the function:
def myplotfunction():
...
return ...
Where am I going wrong? I am misunderstanding syntax or how
request.vars works?
I would appreciate any help.
- Josh
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Re: [web2py] embed image from variable
Maybe you want embed in html which is much cooler it requires only one
single request/response:
def index():
form = SQLFORM.factory(Field('x')).process()
img64 = None
if form.accepted:
img = myplotfunction(form.vars.x)
img64 = embed64(data=img,extension='image/png') # - ! if img not png
then change extension !
return locals()
{{=form}}
{{if form.accepted:}}
img src={{=img64}} /
{{pass}}
2013/10/31 Massimo Di Pierro massimo.dipie...@gmail.com
Not sure I understand. You have every piece you need.
def index():
form = SQLFORM.factory(Field('x')).process()
return locals()
and in index.html()
{{=form}}
{{if form.accepted:}}
img src={{=URL(f='myplotfunction'**, vars=dict(myvar=**
form.vars.x))}}/
{{pass}}
On Wednesday, 30 October 2013 14:55:50 UTC-5, Josh Myers wrote:
I have all this working the same way as Massimo suggested with
matplotlib, no problems.
But, I can't for the life of me figure out how to pass a variable into
the controller plot function from the view. This would be so I can, for
example, ask the user to choose a variable through a form and then produce
a histogram of that variable with matplotlib. Right now I have it working
but only if the variable for the histogram is preset in the controller plot
function.
I tried to set the variable with request.vars like so:
img src={{=URL(f='myplotfunction'**, vars=dict(myvar=**
userselectedvar))}}/
And then simply use request.vars.myvar in the function:
def myplotfunction():
...
return ...
Where am I going wrong? I am misunderstanding syntax or how request.vars
works?
I would appreciate any help.
- Josh
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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Re: [web2py] embed image from variable
I have all this working the same way as Massimo suggested with matplotlib, no
problems.
But, I can't for the life of me figure out how to pass a variable into the
controller plot function from the view. This would be so I can, for example,
ask the user to choose a variable through a form and then produce a histogram
of that variable with matplotlib. Right now I have it working but only if the
variable for the histogram is preset in the controller plot function.
I tried to set the variable with request.vars like so:
img src={{=URL(f='myplotfunction', vars=dict(myvar=userselectedvar))}}/
And then simply use request.vars.myvar in the function:
def myplotfunction():
...
return ...
Where am I going wrong? I am misunderstanding syntax or how request.vars works?
I would appreciate any help.
- Josh
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
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Re: [web2py] embed image from variable
Not sure I understand. You have every piece you need.
def index():
form = SQLFORM.factory(Field('x')).process()
return locals()
and in index.html()
{{=form}}
{{if form.accepted:}}
img src={{=URL(f='myplotfunction', vars=dict(myvar=form.vars.x))}}/
{{pass}}
On Wednesday, 30 October 2013 14:55:50 UTC-5, Josh Myers wrote:
I have all this working the same way as Massimo suggested with matplotlib,
no problems.
But, I can't for the life of me figure out how to pass a variable into the
controller plot function from the view. This would be so I can, for
example, ask the user to choose a variable through a form and then produce
a histogram of that variable with matplotlib. Right now I have it working
but only if the variable for the histogram is preset in the controller plot
function.
I tried to set the variable with request.vars like so:
img src={{=URL(f='myplotfunction', vars=dict(myvar=userselectedvar))}}/
And then simply use request.vars.myvar in the function:
def myplotfunction():
...
return ...
Where am I going wrong? I am misunderstanding syntax or how request.vars
works?
I would appreciate any help.
- Josh
--
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
---
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[web2py] embed image from variable
Hi,
I like to add Graphs with matplotlib directly into my sites. I used a
web2py slice to get an image into a variable:
from matplotlib.backends.backend_agg import FigureCanvasAgg as FigureCanvas
from matplotlib.figure import Figure
import cStringIO
def plot(title='title',xlab='x',ylab='y',mode='plot',
data={'xxx':[(0,0),(1,1),(1,2),(3,3)],
'yyy':[(0,0,.2,.2),(2,1,0.2,0.2),(2,2,0.2,0.2),(3,3,0.2,0.3
)]}):
fig=Figure()
fig.set_facecolor('white')
ax=fig.add_subplot(111)
if title: ax.set_title(title)
if xlab: ax.set_xlabel(xlab)
if ylab: ax.set_ylabel(ylab)
legend=[]
keys=sorted(data)
for key in keys:
stream = data[key]
(x,y)=([],[])
for point in stream:
x.append(point[0])
y.append(point[1])
if mode=='plot':
ell=ax.plot(x, y)
legend.append((ell,key))
if mode=='hist':
ell=ax.hist(y,20)
#if legend:
#ax.legend([x for (x,y) in legend], [y for (x,y) in legend],
# 'upper right', shadow=True)
canvas=FigureCanvas(fig)
stream=cStringIO.StringIO()
canvas.print_png(stream)
return stream.getvalue()
def pcolor2d(title='title',xlab='x',ylab='y',
z=[[1,2,3,4],[2,3,4,5],[3,4,5,6],[4,5,6,7]]):
fig=Figure()
fig.set_facecolor('white')
ax=fig.add_subplot(111)
if title: ax.set_title(title)
if xlab: ax.set_xlabel(xlab)
if ylab: ax.set_ylabel(ylab)
image=ax.imshow(z)
image.set_interpolation('bilinear')
canvas=FigureCanvas(fig)
stream=cStringIO.StringIO()
canvas.print_png(stream)
return stream.getvalue()
this is my controler:
def Testimg():
plotimg=plot()
return dict(plotimg=plotimg)
and this is my view:
{{extend 'layout.html'}}
Some Content
table
{{=TR(TD(Test),TD('Value'))}}
/table
{{=plotimg}}
I managed to view the plot but I cant get it embedded into my page with
some content above and below.
And I get (probably) the binary png displayed as text
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Re: [web2py] embed image from variable
I guess you can try
{{=IMG(_src=plotimg)}}
or
img src={{=plotimg}} /
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Re: [web2py] embed image from variable
I tried that but it doesn't show an image it puts the img tag in the html
code and fills the src= with the pinary stuff but no image is displayed
On Tuesday, January 29, 2013 4:53:33 PM UTC+1, rochacbruno wrote:
I guess you can try
{{=IMG(_src=plotimg)}}
or
img src={{=plotimg}} /
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Re: [web2py] embed image from variable
I did some experimenting the problem is putting the image into the return
dict() or into any variable.
I got no clue how to fix it or why that is the problem.
On Tuesday, January 29, 2013 5:07:16 PM UTC+1, BlueShadow wrote:
I tried that but it doesn't show an image it puts the img tag in the html
code and fills the src=binary with the pinary stuff but no image is
displayed
On Tuesday, January 29, 2013 4:53:33 PM UTC+1, rochacbruno wrote:
I guess you can try
{{=IMG(_src=plotimg)}}
or
img src={{=plotimg}} /
--
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Re: [web2py] embed image from variable
You do not return the image that way. You need two actions, one only
returns plot() (the binary data) and another would be a regular action
which display a link to the other action.
def myimage(): return plot()
def Testing(): return dict() # in view img src={{=URL('myimage')}}/ ...
On Tuesday, 29 January 2013 10:53:03 UTC-6, BlueShadow wrote:
I did some experimenting the problem is putting the image into the return
dict() or into any variable.
I got no clue how to fix it or why that is the problem.
On Tuesday, January 29, 2013 5:07:16 PM UTC+1, BlueShadow wrote:
I tried that but it doesn't show an image it puts the img tag in the html
code and fills the src=binary with the pinary stuff but no image is
displayed
On Tuesday, January 29, 2013 4:53:33 PM UTC+1, rochacbruno wrote:
I guess you can try
{{=IMG(_src=plotimg)}}
or
img src={{=plotimg}} /
--
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