Module object has no attribute

I am having latest version of all then also i am getting this error.
I have installed pytorch by source.

sameer@sameer-SVF15213SNW:~$ conda update conda
Fetching package metadata .........
Solving package specifications: .

# All requested packages already installed.
# packages in environment at /home/sameer/anaconda2:
#
conda                     4.3.22                   py27_0  
sameer@sameer-SVF15213SNW:~$ conda update pytorch
Fetching package metadata .........
Solving package specifications: .

# All requested packages already installed.
# packages in environment at /home/sameer/anaconda2:
#
pytorch                   0.1.12               py27_2cu75    soumith
sameer@sameer-SVF15213SNW:~$ conda update torch

PackageNotInstalledError: Package is not installed in prefix.
  prefix: /home/sameer/anaconda2
  package name: torch


sameer@sameer-SVF15213SNW:~$ conda update torchvision
Fetching package metadata .........
Solving package specifications: .

# All requested packages already installed.
# packages in environment at /home/sameer/anaconda2:
#
torchvision               0.1.8                    py27_2    soumith
sameer@sameer-SVF15213SNW:~$ python testmodel.py


Traceback (most recent call last):
  File "testmodel.py", line 16, in <module>
    model=torch.load('./firstN.th')
  File "/home/sameer/anaconda2/lib/python2.7/site-packages/torch/serialization.py", line 229, in load
    return _load(f, map_location, pickle_module)
  File "/home/sameer/anaconda2/lib/python2.7/site-packages/torch/serialization.py", line 377, in _load
    result = unpickler.load()
AttributeError: 'module' object has no attribute 'Net'
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