python install settings...

[jtan325]

hi,

i am running Linux Ubuntu Hoary and am trying to build the Python
numarray package, v. 1.3.2 by hand since ubuntu's repos won't be
updated until breezy.

i have python 2.4, and gcc 3.3.5

after unpacking the tar, i run "python setup.py install", as it says in
the installation instructions. i get the following:

[colfax 53] numarray-1.3.2 > python setup.py install
Using EXTRA_COMPILE_A RGS = []
running install
running build
running build_py
copying Lib/numinclude.py -> build/lib.linux-i686-2.4/numarray
running build_ext
Traceback (most recent call last):
File "setup.py", line 222, in ?
main()
File "setup.py", line 213, in main
setup(**p)
File "/usr/lib/python2.4/distutils/core.py", line 149, in setup
dist.run_comman ds()
File "/usr/lib/python2.4/distutils/dist.py", line 946, in
run_commands
self.run_comman d(cmd)
File "/usr/lib/python2.4/distutils/dist.py", line 966, in run_command
cmd_obj.run()
File "/usr/lib/python2.4/distutils/command/install.py", line 506, in
run
self.run_comman d('build')
File "/usr/lib/python2.4/distutils/cmd.py", line 333, in run_command
self.distributi on.run_command( command)
File "/usr/lib/python2.4/distutils/dist.py", line 966, in run_command
cmd_obj.run()
File "/usr/lib/python2.4/distutils/command/build.py", line 112, in
run
self.run_comman d(cmd_name)
File "/usr/lib/python2.4/distutils/cmd.py", line 333, in run_command
self.distributi on.run_command( command)
File "/usr/lib/python2.4/distutils/dist.py", line 966, in run_command
cmd_obj.run()
File "/usr/lib/python2.4/distutils/command/build_ext.py", line 254,
in run
customize_compi ler(self.compil er)
File "/usr/lib/python2.4/distutils/sysconfig.py", line 174, in
customize_compi ler
cc_cmd = cc + ' ' + opt
TypeError: cannot concatenate 'str' and 'NoneType' objects


I had a similiar (but different) error earlier, but then I learned I
had to set my "CC" environment variable. So I set that to "gcc". i have
tried setting my "OPT" setting to something like "-g 02" (no idea what
it means just found it somewhere, but it still didn't work.

upon closer inspection of Python's distutils sysconfig.py, is the error
being caused by the ' ' in "cc_cmd = cc + ' ' + opt"? Any ideas on this
new error? Are there packages/settings I need to take care of before i
can use Python's distutils to install stuff?

Thanks,
Jason

[Edvard Majakari]

Re: python install settings...

"jtan325" <mr.jasontan@gm ail.com> writes:

[color=blue]
> customize_compi ler
> cc_cmd = cc + ' ' + opt
> TypeError: cannot concatenate 'str' and 'NoneType' objects[/color]

[...]
[color=blue]
> upon closer inspection of Python's distutils sysconfig.py, is the error
> being caused by the ' ' in "cc_cmd = cc + ' ' + opt"? Any ideas on this
> new error? Are there packages/settings I need to take care of before i
> can use Python's distutils to install stuff?[/color]

The error message indicates that one of the operands on the right side is
None. ' ' is clearly a string constant (string with one whitespace), so the
problem must be either cc or opt - one of them is None.

Toying a little I realized Python emits different warnings for pairs
cc, opt = None, 'cat' and
cc, opt = 'cat', None:
[color=blue][color=green][color=darkred]
>>> cc, opt = None, 'cat'
>>> cc_cmd = cc + ' ' + opt[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: unsupported operand type(s) for +: 'NoneType' and 'str'

# note the different TypeError message below
[color=blue][color=green][color=darkred]
>>> cc, opt = 'cat', None
>>> cc_cmd = cc + ' ' + opt[/color][/color][/color]
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: cannot concatenate 'str' and 'NoneType' objects

So, for some reason, variable opt is None.

--
# Edvard Majakari Software Engineer
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