Re: [web2py] Error PIL path
On Friday, July 19, 2019 at 11:04:25 AM UTC-7, Márcio Luis Dresch wrote:
>
> #this is a copy from
> http://www.web2pyslices.com/slice/show/1522/generate-a-thumbnail-that-fits-in-a-box
>
I'm not sure I agree with Nico, after reading your followup ... is
"ImageUploads" the name of your application?
As copied here, "uploadfolder" has a typo ... check that your code doesn't
actually have that.
And in your view, you use "article.image" to generate the URL ... but the
model has "picture" and "thumbnail" but not "image". Since that's in the
slice article, it may have been a typo by Bruno, or I may be missing
something.
Good luck!
/dps
>
> #modules\smarthumb.py
> from gluon import current
> import os
> try:
> from PIL import Image
> except:
> import Image
>
> def SMARTHUMB(image, box, fit=True, name="thumb"):
> '''Downsample the image.
> @param img: Image - an Image-object
> @param box: tuple(x, y) - the bounding box of the result image
> @param fit: boolean - crop the image to fill the box
> '''
> if image:
> request = current.request
> img = Image.open(request.folder + 'uploads/' + image)
> #preresize image with factor 2, 4, 8 and fast algorithm
>
> factor = 1
> while img.size[0] / factor > 2 * box[0] and img.size[1] * 2 / factor > 2 *
> box[1]:
> factor *= 2
> if factor > 1:
> img.thumbnail((img.size[0] / factor, img.size[1] / factor), Image.NEAREST)
>
> #calculate the cropping box and get the cropped part
> if fit:
> x1 = y1 = 0
> x2, y2 = img.size
> wRatio = 1.0 * x2 / box[0]
> hRatio = 1.0 * y2 / box[1]
> if hRatio > wRatio:
> y1 = int(y2 / 2 - box[1] * wRatio / 2)
> y2 = int(y2 / 2 + box[1] * wRatio / 2)
> else:
> x1 = int(x2 / 2 - box[0] * hRatio / 2)
> x2 = int(x2 / 2 + box[0] * hRatio / 2)
> img = img.crop((x1, y1, x2, y2))
>
> #Resize the image with best quality algorithm ANTI-ALIAS
> img.thumbnail(box, Image.ANTIALIAS)
>
> img.thumbnail.show()
>
> root, ext = os.path.splitext(image)
> thumb = '%s_%s%s' % (root, name, ext)
>
> #save it into a file-like object
> img.save(request.folder + 'uploads/' + thumb)
>
> return thumb
>
> #models\db.py
>
> Article = db.define_table('article',
> Field("title"),
> Field("article_text", "text"),
> Field("picture", "upload", uploadfoder='uploads'),
> Field("thumbnail", "upload", uploadfoder='uploads')
> )
>
>
> from smarthumb import SMARTHUMB
>
> Article.thumbnail.compute = lambda row: SMARTHUMB(row.picture, (200,200))
>
>
> #controllers\default.py
> def addarticle():
> form = SQLFORM(Article).process()
> return dict(form=form)
>
> def showarticle():
> id = request.args(0) or redirect(URL('default', 'index'))
> article = Article[id]
> return dict(article=article)
>
> #views\addarticle.html
> Add an article
>
> {{=form}}
>
> #views\showarticle.html
>
> {{=article.title}}
>
>
>
>
>
> {{=MARKMIN(article.article_text)}}
>
>
>
> Em qui, 11 de jul de 2019 às 05:28, Nico de Groot > escreveu:
>
>> The example code assumes that the images are in the standard ‘uploads’
>> folder. Without looking at at your code, it seems that you defined - in
>> your model file - the download folder to be ‘imageuploads’. That would
>> explain why the thumbnail is not found.
>>
>> Nico de Groot
>>
>> --
>> 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)
>> ---
>> You received this message because you are subscribed to the Google Groups
>> "web2py-users" group.
>> To unsubscribe from this group and stop receiving emails from it, send an
>> email to web...@googlegroups.com .
>> To view this discussion on the web visit
>> https://groups.google.com/d/msgid/web2py/20f37e0e-df44-4eba-a037-74ae476e21fc%40googlegroups.com
>> .
>> For more options, visit https://groups.google.com/d/optout.
>>
>
--
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] Error PIL path
#this is a copy from
http://www.web2pyslices.com/slice/show/1522/generate-a-thumbnail-that-fits-in-a-box
#modules\smarthumb.py
from gluon import current
import os
try:
from PIL import Image
except:
import Image
def SMARTHUMB(image, box, fit=True, name="thumb"):
'''Downsample the image.
@param img: Image - an Image-object
@param box: tuple(x, y) - the bounding box of the result image
@param fit: boolean - crop the image to fill the box
'''
if image:
request = current.request
img = Image.open(request.folder + 'uploads/' + image)
#preresize image with factor 2, 4, 8 and fast algorithm
factor = 1
while img.size[0] / factor > 2 * box[0] and img.size[1] * 2 / factor > 2 *
box[1]:
factor *= 2
if factor > 1:
img.thumbnail((img.size[0] / factor, img.size[1] / factor), Image.NEAREST)
#calculate the cropping box and get the cropped part
if fit:
x1 = y1 = 0
x2, y2 = img.size
wRatio = 1.0 * x2 / box[0]
hRatio = 1.0 * y2 / box[1]
if hRatio > wRatio:
y1 = int(y2 / 2 - box[1] * wRatio / 2)
y2 = int(y2 / 2 + box[1] * wRatio / 2)
else:
x1 = int(x2 / 2 - box[0] * hRatio / 2)
x2 = int(x2 / 2 + box[0] * hRatio / 2)
img = img.crop((x1, y1, x2, y2))
#Resize the image with best quality algorithm ANTI-ALIAS
img.thumbnail(box, Image.ANTIALIAS)
img.thumbnail.show()
root, ext = os.path.splitext(image)
thumb = '%s_%s%s' % (root, name, ext)
#save it into a file-like object
img.save(request.folder + 'uploads/' + thumb)
return thumb
#models\db.py
Article = db.define_table('article',
Field("title"),
Field("article_text", "text"),
Field("picture", "upload", uploadfoder='uploads'),
Field("thumbnail", "upload", uploadfoder='uploads')
)
from smarthumb import SMARTHUMB
Article.thumbnail.compute = lambda row: SMARTHUMB(row.picture, (200,200))
#controllers\default.py
def addarticle():
form = SQLFORM(Article).process()
return dict(form=form)
def showarticle():
id = request.args(0) or redirect(URL('default', 'index'))
article = Article[id]
return dict(article=article)
#views\addarticle.html
Add an article
{{=form}}
#views\showarticle.html
{{=article.title}}
{{=MARKMIN(article.article_text)}}
Em qui, 11 de jul de 2019 às 05:28, Nico de Groot
escreveu:
> The example code assumes that the images are in the standard ‘uploads’
> folder. Without looking at at your code, it seems that you defined - in
> your model file - the download folder to be ‘imageuploads’. That would
> explain why the thumbnail is not found.
>
> Nico de Groot
>
> --
> 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)
> ---
> You received this message because you are subscribed to the Google Groups
> "web2py-users" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to web2py+unsubscr...@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/web2py/20f37e0e-df44-4eba-a037-74ae476e21fc%40googlegroups.com
> .
> For more options, visit https://groups.google.com/d/optout.
>
--
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] Error PIL path
The example code assumes that the images are in the standard ‘uploads’ folder. Without looking at at your code, it seems that you defined - in your model file - the download folder to be ‘imageuploads’. That would explain why the thumbnail is not found. Nico de Groot -- 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) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/20f37e0e-df44-4eba-a037-74ae476e21fc%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
[web2py] Error PIL path
Hi, I'm new to web2py and am looking for a solution to a problem. The library is returning a path error while fetching an image for the thumbnail. I took the example from: http://www.web2pyslices.com/slice/show/1522/generate-a-thumbnail-that-fits-in-a-box, which returns File "C: \ Users \ marcio.INTRANET \ AppData \ Local \ Programs \ Python \ Python37-32 \ lib \ site-packages \ PIL \ Image.py", line 2652, in open fp = builtins.open (filename, "rb") FileNotFoundError: [Errno 2] No such file or directory: 'D: \\ web2py \\ applications \\ ImageUploads / article.picture.99b1bed4d9cf8a04.636172726f2e6a7067.jpg' Can anyone help a clarify about the error? windows10 64 Web2py 2.18.5-stable+timestamp.2019.04.08.04.22.03 (Rodando em Rocket 1.2.6, Python 3.7.2) -- 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) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to web2py+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/web2py/aed29bb9-9238-4600-993e-994bae5fe2c9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
