Dear Rajdeep,

It seems that the update of setuptools happened with python 2 instead of 3. You can force pip to use a specific Python interpreter by calling it as 'python -m pip' instead of simply calling 'pip', where 'python' should be the specific interpreter that you want to install something on.

So in this case, you can try:

Best regards,

Dominik

Dear sir,

            I tried following your suggestion and found the following:
>> sudo pip install -U setuptools
Requirement already up-to-date: setuptools in /usr/local/lib/python2.7/dist-packages
Cleaning up...

It seems although I have installed python-3.5, but my default is python-2.7. I changed the alias in bash so that calling python will call python-3.5. But the problem persists.
>> sudo python -m pip install --user /home/rajdeep/soft/Z2Pack-master-2.1.x

...

Downloading/unpacking fsc.export (from z2pack==2.1.1)
  Downloading fsc.export-1.1.0.tar.gz
  Running setup.py (path:/tmp/pip_build_rajdeep/fsc.export/setup.py) egg_info for package fsc.export
    error in fsc.export setup command: Invalid environment marker: python_version < "3"
    Complete output from command python setup.py egg_info:
    error in fsc.export setup command: Invalid environment marker: python_version < "3"

Please help. Thanks in advance.

best regards,

Rajdeep

On Sat, Apr 14, 2018 at 10:34 PM, Rajdeep Banerjee <rajdeep.jzs@gmail.com> wrote:

Dear sir,

              thank you very much for your suggestion, I will let you know if it works.

best regards,

Rajdeep

On Sat, Apr 14, 2018, 8:57 PM Dominik Gresch <greschd@phys.ethz.ch> wrote:

Hi Rajdeep,

I think this issue might be due to an outdated version of the 'setuptools' package which does not recognize these environment markers.

Can you try running 

'pip install -U setuptools'

before installing Z2Pack?

Best regards,

Dominik

Am 14.04.2018 08:23 schrieb Rajdeep Banerjee <rajdeep.jzs@gmail.com>:

Hi,

   I am trying to install Z2Pack 2.1.1 (from source file). I am getting the following error:

Downloading/unpacking fsc.export (from z2pack==2.1.1)
  Downloading fsc.export-1.1.0.tar.gz
  Running setup.py (path:/tmp/pip_build_rajdeep/fsc.export/setup.py) egg_info for package fsc.export
    error in fsc.export setup command: Invalid environment marker: python_version < "3"
    Complete output from command python setup.py egg_info:
    error in fsc.export setup command: Invalid environment marker: python_version < "3"

----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /tmp/pip_build_rajdeep/fsc.export
Storing debug log for failure in /tmp/tmp3bth1l3g

I thought it is due to python version but I have python 3.5 as shown below:

[rajdeep@anna: Z2Pack-master-2.1.x]:python
Python 3.5.3 (default, Apr 22 2017, 00:00:00)
[GCC 4.8.4] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>

Please help. Thanks in advance!

best regards,

--

Rajdeep Banerjee
PhD student

JNCASR, Bangalore

India

--

Rajdeep Banerjee
PhD student

JNCASR, Bangalore

India