[yocto] export command in bitbake

[Zoran Stojsavljevic]

Hello to all YOCTO users,

I have one (I should say naive) question considering/querying environment
variables, initially set with bitbake scripts.

I have both python (2.7.14) and python3.6 (3.6.2). But, as far as I can
see/say, both interpreters do NOT support export declaration (supported
with /bin/bash). In other words, every child shell will (with export
declaration on certain variables) inherit parent's environment.

[user at 192 conf]$ python
Python 2.7.14 (default, Nov  2 2017, 18:42:05)
[GCC 7.2.1 20170915 (Red Hat 7.2.1-2)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>>
[user at 192 conf]$ python3.6
Python 3.6.2 (default, Oct  2 2017, 16:51:32)
[GCC 7.2.1 20170915 (Red Hat 7.2.1-2)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>
[user at 192 conf]$

Now, I see that bitbake (written in python language) supports export. From
here:
...poky/meta/conf/bitbake.conf

Excerpt from the file:
# Path prefixes
export base_prefix = ""
export prefix = "/usr"
export exec_prefix = "${prefix}"

root_prefix = "${@bb.utils.contains('DISTRO_FEATURES', 'usrmerge',
'${exec_prefix}', '${base_prefix}', d)}"

# Base paths
export base_bindir = "${root_prefix}/bin"
export base_sbindir = "${root_prefix}/sbin"
export base_libdir = "${root_prefix}/${baselib}"
export nonarch_base_libdir = "${root_prefix}/lib"

I assume this file: ...poky/meta/conf/bitbake.conf mandatory executes when
I source the oe-init-build-env file. Command: . oe-init-build-env

After that I would like to access these environment variables from the
/bin/bash, and query them, but it seems that this is NOT possible?!

I need advise here: how I can query bitbake environment variables set by .
oe-init-build-env, using /bin/bash? Or should I use some special written
python procedure to do this?

Help required/needed!?

I hope what I write here does make sense, does'n it?

Thank you,
Zoran
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