Using mako.imports setting in Pyramid

[Hollister]

I'd like to use  mako.imports = 'import logging' in the .ini file to replace

<%!

    import logging

%>

In each template, but it does not work. The template just throws NameError: name 'logging' is not defined when I attempt to use it.

It appears the mako.imports doesn't even get called, since a setting like mako.imports = 'import SpamAndEggs' doesn't throw an error.

This is probably a Pyramid issue, but I thought I'd see if anybody here. has an idea. I'm using Pyramid 1.3 and Mako 0.7.0.

I also posted this on SO, but not a peep yet.

[Michael Bayer]

i'm not sure what mako.imports is, that sounds like part of the Pyramid integration, so you'd want to check that as far as setting the config like this.

For sanity, here's how it looks in pure Mako libs:

>>> from mako.lookup import TemplateLookup

>>> l = TemplateLookup(imports=["import logging"])

>>> l.put_string("some template", "hello world")

>>> print l.get_template("some template").code

from mako import runtime, filters, cache

UNDEFINED = runtime.UNDEFINED

__M_dict_builtin = dict

__M_locals_builtin = locals

_magic_number = 8

_modified_time = 1349649241.423057

_enable_loop = True

_template_filename = None

_template_uri = 'some template'

_source_encoding = 'ascii'

import logging

_exports = []

def render_body(context,**pageargs):

    __M_caller = context.caller_stack._push_frame()

    try:

        __M_locals = __M_dict_builtin(pageargs=pageargs)

        __M_writer = context.writer()

        # SOURCE LINE 1

        __M_writer(u'hello world')

        return ''

    finally:

        context.caller_stack._pop_frame()

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[Hollister]

Ok, so looking at the Pyramid-generated Mako template code, it just literally outputs what's in that config setting, quotes, brackets and all.

So, the syntax has to be:

mako.imports = import logging

with multiple imports as

mako.imports = import logging, some.other.module

not

mako.imports = import logging, import some.other.module

Which I didn't infer from the documentation that reads "String list of Python statements, typically individual “import” lines" (but maybe I just didn't understand it correctly).

Anyway, many thanks for helping figure this one out, Mike!

[Michael Bayer]

seems like pyramid's doc is missing something.  The "string list" from the Mako pov is really a list of strings:

TemplateLookup(imports=["import logging", "import x", "import y"])

so maybe something has to happen in a pyramid config file to turn it into a list.    or maybe its just not supported.

To view this discussion on the web visit https://groups.google.com/d/msg/mako-discuss/-/elOoUhJwqaAJ.

[Hollister]

That's exactly what I thought. Nobody has replied from the Pyramid list yet (pylons-discuss).

[Hollister]

From pylons-discuss, the syntax is:

mako.imports = 

    import logging 

    import some.other.module 

Import statements separated by line breaks. I think the docs should state this with an example, as "string list" to Python people is rather different.