Python 2.7.11 |Anaconda 2.5.0 (32-bit)| (default, Jan 29 2016, 15:36:56) [MSC v.1500 32 bit (Intel)] on win32
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>>> """
... Created on Tue Mar 08 14:39:24 2016
... 
... @author: bjl
... """
'\nCreated on Tue Mar 08 14:39:24 2016\n\n@author: bjl\n'
>>> 
>>> import pypsa

import numpy as np

network = pypsa.Network()

for i in range(3):
    network.add("Bus","My bus {}".format(i))
>>> >>> >>> >>> >>> >>> ... ... 
Bus My bus 0
Bus My bus 1
Bus My bus 2
>>> 
>>> print(network.buses)
C:\Anaconda2\lib\site-packages\pandas\core\format.py:1995: RuntimeWarning: invalid value encountered in absolute
  abs_vals = np.abs(self.values)

         control sub_network  y  v_mag_pu_min current_type  v_nom  \
My bus 0      PQ              0             0           AC      1   
My bus 1      PQ              0             0           AC      1   
My bus 2      PQ              0             0           AC      1   

          v_mag_pu_max  x           obj  
My bus 0           NaN  0  Bus My bus 0  
My bus 1           NaN  0  Bus My bus 1  
My bus 2           NaN  0  Bus My bus 2  
C:\Anaconda2\lib\site-packages\pandas\core\format.py:1998: RuntimeWarning: invalid value encountered in greater
  has_large_values = (abs_vals > 1e8).any()
C:\Anaconda2\lib\site-packages\pandas\core\format.py:1999: RuntimeWarning: invalid value encountered in less
  has_small_values = ((abs_vals < 10 ** (-self.digits)) &
C:\Anaconda2\lib\site-packages\pandas\core\format.py:2000: RuntimeWarning: invalid value encountered in greater
  (abs_vals > 0)).any()
>>> >>> for i in range(3):
...     network.add("Line","My line {}".format(i),
...                 bus0="My bus {}".format(i),
...                 bus1="My bus {}".format((i+1)%3),
...                 x=0.0001)
... 
Line My line 0
Line My line 1
Line My line 2
>>> 
>>> print(network.lines)
           s_nom_min      bus0      bus1  capital_cost s_nom_extendable  \
My line 0          0  My bus 0  My bus 1             0            False   
My line 1          0  My bus 1  My bus 2             0            False   
My line 2          0  My bus 2  My bus 0             0            False   

           s_nom_opt  s_nom  s_nom_max sub_network  x_pu       ...        b  \
My line 0          0      0        NaN                 0       ...        0   
My line 1          0      0        NaN                 0       ...        0   
My line 2          0      0        NaN                 0       ...        0   

           g  v_ang_min  r_pu  terrain_factor  length  r       x  v_ang_max  \
My line 0  0        NaN     0               1       1  0  0.0001        NaN   
My line 1  0        NaN     0               1       1  0  0.0001        NaN   
My line 2  0        NaN     0               1       1  0  0.0001        NaN   

                      obj  
My line 0  Line My line 0  
My line 1  Line My line 1  
My line 2  Line My line 2  

[3 rows x 22 columns]
>>> 
>>> network.add("Generator","My gen",
...             bus="My bus 0",
...             p_set=100)
Generator My gen
>>> 
>>> print(network.generators)
             bus  sign control  p_min_pu_fixed  capital_cost p_nom_extendable  \
My gen  My bus 0     1      PQ               0             0            False   

        dispatch  p_nom_max  p_nom  p_nom_opt  p_nom_min  p_max_pu_fixed  \
My gen  flexible        NaN      0          0          0               1   

        efficiency source  marginal_cost               obj  
My gen           1                     0  Generator My gen  
>>> 
>>> print(network.generators_t.p_set)
     My gen
now     100
>>> 
>>> network.add("Load","My load",
...             bus="My bus 1",
...             p_set=100)
Load My load
>>> 
>>> print(network.loads)
              bus  sign           obj
My load  My bus 1    -1  Load My load
>>> 
>>> print(network.loads_t.p_set)
     My load
now      100
>>> 
>>> network.pf()
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "C:\Anaconda2\lib\site-packages\pypsa\pf.py", line 78, in network_pf
    network.build_graph()
  File "C:\Anaconda2\lib\site-packages\pypsa\components.py", line 697, in build_graph
    for t in self.iterate_components(branch_types)
  File "C:\Anaconda2\lib\site-packages\networkx\classes\multigraph.py", line 403, in add_edges_from
    for e in ebunch:
  File "C:\Anaconda2\lib\site-packages\pypsa\components.py", line 698, in <genexpr>

    for branch in t.df.itertuples())
AttributeError: 'tuple' object has no attribute 'bus0'
>>> >>> print(network.lines_t.p0)
     My line 0  My line 1  My line 2
now          0          0          0
>>> 
>>> print(network.buses_t.v_ang*180/np.pi)
     My bus 0  My bus 1  My bus 2
now         0         0         0
>>>