我在谷歌应用引擎上运行了一个django应用。该应用程序的一个功能是根据使用应用程序时提供给它的数据生成图表。我使用reportlab生成图表，这在开发过程中起作用。但是，在将应用上传到Google App Engine时，任何查看图表页面的尝试都会返回以下错误：
“ ImportError at ... 没有名为_renderPM的模块“
到目前为止，我已经了解到错误是由于reportlab依赖于PIL而GAE不支持。我已将reportlab模块放在app的项目目录中，但它仍然不起作用。
因此，我的问题是：我需要做些什么才能在应用上查看图表？无论如何，根据我的应用程序的要求，使报告工作在GAE上工作吗？
（应用程序“mycharts.py”和“views.py”的代码如下所示。）
from reportlab.graphics.shapes import Drawing, String
from reportlab.graphics.charts.barcharts import VerticalBarChart
from reportlab.graphics.charts.linecharts import HorizontalLineChart
from reportlab.graphics.charts.lineplots import LinePlot
from reportlab.graphics.widgets.markers import makeMarker
from reportlab.graphics.charts.textlabels import Label
from reportlab.graphics.widgets.grids import Grid, DoubleGrid
from reportlab.lib import colors
from models import Caller
#Customer gender filter functions begin here
def male_caller_count():
return Caller.objects.filter(gender='Male').count()
def female_caller_count():
return Caller.objects.filter(gender='Female').count()
#Customer gender filter functions end here
class GenderChartDraw(Drawing):
def __init__(self, width=500, height=500, *args, **kw):
Drawing.__init__(self,width,height,*args,**kw)
female = female_caller_count()
male = male_caller_count()
data = [(male, 0), (0, female)]
self.add(VerticalBarChart(), name='chart')
self.add(String(100,450,'Caller by Gender'), name='title')
self.title.fontName = 'Helvetica-Bold'
self.title.fontSize = 20
self.chart.x = 70
self.chart.y = 20
self.chart.width = 300
self.chart.height = 400
self.chart.data = data
self.chart.strokeColor = colors.black
self.chart.valueAxis.valueMin = 0
self.chart.valueAxis.valueMax = 50
self.chart.valueAxis.valueStep = 5
self.chart.valueAxis.visibleGrid = 1
self.chart.categoryAxis.style = 'stacked'
self.chart.categoryAxis.categoryNames = ['Male', 'Female']
self.chart.bars[0].fillColor = colors.HexColor('#376BF9')
self.chart.bars[1].fillColor = colors.HexColor('#FE03E5')
self.chart.categoryAxis.labels.fontSize = 13
if __name__=='__main__':
#use the standard 'save' method to save barchart.gif, barchart.pdf etc
#for quick feedback while working.
GenderChartDraw().save(formats=['gif','png','jpg','pdf'],outDir='.',fnRoot='barchart')
from django.shortcuts import render, render_to_response
from django.http import HttpResponse, HttpResponseRedirect
from django.template import RequestContext
from django.views.decorators.csrf import csrf_exempt
from datetime import datetime
from models import Caller
import mycharts
from django.contrib.auth.decorators import login_required
@login_required
def app_stats(request):
return render_to_response('AppStats.html', context_instance=RequestContext(request))
@login_required
def gender_chart(request):
#instantiate a drawing object
d = mycharts.GenderChartDraw()
if 'height' in request:
d.height = int(request['height'])
if 'width' in request:
d.width = int(request['width'])
if 'numbers' in request:
strNumbers = request['numbers']
numbers = map(int, strNumbers.split(','))
d.chart.data = [numbers] #bar charts take a list-of-lists for data
if 'title' in request:
d.title.text = request['title']
#get a GIF (or PNG, JPG, or whatever)
binaryStuff = d.asString('gif')
return HttpResponse(binaryStuff, 'image/gif')
ImportError at /CallApp/stats/GenderChart/
No module named _renderPM
see https://www.reportlab.com/software/opensource/rl-addons/
Request Method: GET
Request URL: http://cacallapp.appspot.com/CallApp/stats/GenderChart/
Django Version: 1.4.3
Exception Type: ImportError
Exception Value:
No module named _renderPM
see https://www.reportlab.com/software/opensource/rl-addons/
Exception Location: /base/data/home/apps/s~cacallapp/1.365898222031464318/reportlab/graphics/renderPM.py in <module>, line 32
Python Executable: /python27_runtime/python27_dist/python
Python Version: 2.7.3
Python Path:
['/base/data/home/apps/s~cacallapp/1.365898222031464318',
'/python27_runtime/python27_dist/lib/python27.zip',
'/python27_runtime/python27_dist/lib/python2.7',
'/python27_runtime/python27_dist/lib/python2.7/plat-linux2',
'/python27_runtime/python27_dist/lib/python2.7/lib-tk',
'/python27_runtime/python27_dist/lib/python2.7/lib-old',
'/python27_runtime/python27_dist/lib/python2.7/lib-dynload',
'/python27_runtime/python27_dist/lib/python2.7/site-packages',
'/python27_runtime/python27_lib/versions/1',
'/python27_runtime/python27_lib/versions/third_party/PIL-1.1.7',
'/python27_runtime/python27_lib/versions/third_party/PIL-1.1.7/PIL',
'/python27_runtime/python27_lib/versions/third_party/django-1.4',
'/python27_runtime/python27_lib/versions/third_party/webapp2-2.3',
'/python27_runtime/python27_lib/versions/third_party/webob-1.1.1',
'/python27_runtime/python27_lib/versions/third_party/yaml-3.10',
'/base/data/home/apps/s~cacallapp/1.365898222031464318/..']
Server time: Tue, 12 Mar 2013 08:38:21 +0000
/python27_runtime/python27_lib/versions/third_party/django-1.4/django/core/handlers/base.py in get_response
response = callback(request, *callback_args, **callback_kwargs) ...
▶ Local vars
/python27_runtime/python27_lib/versions/third_party/django-1.4/django/contrib/auth/decorators.py in _wrapped_view
return view_func(request, *args, **kwargs) ...
▶ Local vars
/base/data/home/apps/s~cacallapp/1.365898222031464318/CallApp/views.py in gender_chart
binaryStuff = d.asString('gif')
...
▶ Local vars
/base/data/home/apps/s~cacallapp/1.365898222031464318/reportlab/graphics/shapes.py in asString
from reportlab.graphics import renderPM
...
▶ Local vars
/base/data/home/apps/s~cacallapp/1.365898222031464318/reportlab/graphics/renderPM.py in <module>
"see https://www.reportlab.com/software/opensource/rl-addons/")
...
▶ Local vars
答案 0 :(得分：1)
默认情况下，SDK未安装PIL，因为许多应用程序不需要它。尝试安装PIL：
https://developers.google.com/appengine/docs/python/images/installingPIL
另外，您是否在app.yaml中指定了PIL：
libraries:
- name: PIL
version: "latest"