python - web2py fails on importing matplotlib modules -

i don't quite understand workings of web2py's custom_import.py. attempting import modules withing mathplotlib getting inconsistent results.

my controller version.py contains these statements.

def import_mathlab_cbook():     import matplotlib.cbook cbook     return "cbook.__file__ = %r" % cbook.__file__  def import_mathlab_figure():     matplotlib.figure import figure     return "figure.__file__ = %r" % figure.__file__  def import_mathlab_backends():     matplotlib.backends.backend_agg import figurecanvasagg      return "figurecanvasagg.__file__ = %r" % figurecanvasagg.__file__ 

the import of matplotlib.cbook works fine, others produce errors.

cbook.__file__ = '/opt/anaconda2/lib/python2.7/site-packages/matplotlib/cbook.py'  traceback (most recent call last):   file "/site/web2py.2.13.4/gluon/restricted.py", line 227, in restricted     exec ccode in environment   file "/site/web2py.2.13.4/applications/plotlab/controllers/version.py", line 53, in <module>   file "/site/web2py.2.13.4/gluon/globals.py", line 412, in <lambda>     self._caller = lambda f: f()   file "/site/web2py.2.13.4/applications/plotlab/controllers/version.py", line 41, in import_mathlab_figure     matplotlib.figure import figure   file "/site/web2py.2.13.4/gluon/custom_import.py", line 95, in custom_importer     return base_importer(pname, globals, locals, fromlist, level) importerror: no module named matplotlib.figure   traceback (most recent call last):   file "/site/web2py.2.13.4/gluon/restricted.py", line 227, in restricted     exec ccode in environment   file "/site/web2py.2.13.4/applications/plotlab/controllers/version.py", line 53, in <module>   file "/site/web2py.2.13.4/gluon/globals.py", line 412, in <lambda>     self._caller = lambda f: f()   file "/site/web2py.2.13.4/applications/plotlab/controllers/version.py", line 46, in import_mathlab_backends     matplotlib.backends.backend_agg import figurecanvasagg   file "/site/web2py.2.13.4/gluon/custom_import.py", line 95, in custom_importer     return base_importer(pname, globals, locals, fromlist, level) importerror: no module named matplotlib.backends.backend_agg 

all of these import statements work command line , when web2py run @ command line.

# python web2py.py -s welcome -p web2py web framework created massimo di pierro, copyright 2007-2016 version 2.13.4-stable+timestamp.2015.12.26.04.59.39 database drivers available: sqlite3, imaplib, pymysql, pg8000 python 2.7.11 |anaconda 2.4.1 (64-bit)| (default, dec  6 2015, 18:08:32)  [gcc 4.4.7 20120313 (red hat 4.4.7-1)] on linux2 type "help", "copyright", "credits" or "license" more information. (interactiveconsole) >>>  >>> import matplotlib.cbook cbook >>>  >>> matplotlib.figure import figure >>>  >>>  matplotlib.backends.backend_agg import figurecanvasagg 

i running python 2.7.11 |anaconda 2.4.1 (64-bit)| (default, dec 6 2015, 18:08:32) , web2py version 2.13.4-stable+timestamp.2015.12.26.04.59.39.

i know there similar question regarding importing copy_reg module, answer has yet accepted problem.