Difference between revisions of "Contrib:Dbpatankar/HT1"

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(→‎How to extract a value from a table using python)
 
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>== How to extract a value from a table using python ==
+
== How to extract a value from a table using python ==
  
 
Say you performed some calculation with your model and extracted your results in a table using POST_RELEVE_T.
 
Say you performed some calculation with your model and extracted your results in a table using POST_RELEVE_T.
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The table is something like :
 
The table is something like :
  
−
{| border="1"
+
{| border="1"
 
!NOEUD         
 
!NOEUD         
−
!X            
+
!COOR_X            
−
!Y           
+
!COOR_Y         
−
!Z           
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!COOR_Z         
 
!DX           
 
!DX           
 
!DY           
 
!DY           
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1. Create a table using POST_RELEVE_T having required values(as shown above). Say that table is TBL.
 
1. Create a table using POST_RELEVE_T having required values(as shown above). Say that table is TBL.
−
       TBL = POST_RELEVE_T(Blah Blah Blah....);
+
       TBL = POST_RELEVE_T(ACTION=(_F(OPERATION='EXTRACTION',  # For Extraction of values
 +
                              INTITULE=Nodal Displacements[m], # Name of the table in .resu file
 +
                              RESULTAT=RESU,                  # The result from which values will be extracted(STAT_NON_LINE)
 +
                              NOM_CHAM=('DEPL',),              # Field to extract. DEPL = Displacements
 +
                              NOM_CMP=('DX','DY','DZ',),      # Components of DISP to extract
 +
                              GROUP_NO='DISP',                # Extract only for nodes of group DISP
 +
                              NUME_ORDRE=10,                  # STAT_NON_LINE calculates for 10 INST. I want only last INST
 +
                          PAGINATION=('INTITULE',              # PAGINATION helps in formatting the table
 +
                                      'RESU',                  # instead of explaining it, I will suggest you to run the code twice,
 +
                                      'NOM_CHAM',              # first with PAGINATION and then by commenting the PAGINATION block
 +
                                      'NUME_ORDRE',            # and check the resulting table in .resu file for both the cases.
 +
                                      'INST',
 +
                                      'ABSC_CURV',),
 +
                              ),
 +
                              ),
 +
                              );
 
2. Now extract this table into a variable say VAR, by
 
2. Now extract this table into a variable say VAR, by
 
       VAR = TBL.EXTR_TABLE();
 
       VAR = TBL.EXTR_TABLE();
−
3. This variable VAR will have many attributes, 'values' attribute is the one which is of our interest for this case.
+
3. This variable VAR will have many attributes, '''values''' attribute is the one which is of our interest for this case.
 
     VAR.values() is actually a python dictionary. For the above table, VAR.values() will look like :
 
     VAR.values() is actually a python dictionary. For the above table, VAR.values() will look like :
  
−
     VAR.values() = {'NOEUD': ['N64    ', 'N113  ....],'X':[1.19......],'Y':[........],'Z':[.........],'DX':[........],'DY'[........],'DZ':[.........]}
+
     VAR.values() = {'NOEUD': ['N64    ', 'N113  ....],'COOR_X':[1.19......],'COOR_Y':[........],'COOR_Z':[.........],'DX':[........],'DY'[........],'DZ':[.........]}
  
−
   Now I will call 'NOEUD', 'X', 'Y', 'Z', 'DX', 'DY', 'DZ' as properties of the table.
+
   Now I will call 'NOEUD', 'COOR_X', 'COOR_Y', 'COOR_Z', 'DX', 'DY', 'DZ' as '''fields''' of the table.
 +
  Note : Actual table will contain many other 'fields' such as 'INTITUTE', 'RESU',......
 
4. Now if I want to access DZ component of node N425 then,
 
4. Now if I want to access DZ component of node N425 then,
 
     (VAR.values().['DZ'])[6];
 
     (VAR.values().['DZ'])[6];
 
     This will give me value 6.28355E-03, which is what I want.
 
     This will give me value 6.28355E-03, which is what I want.
 
5. So now I can assign any variable name to it :
 
5. So now I can assign any variable name to it :
−
     myvar =  (VAR.values().['property'])[index];
+
     myvar =  (VAR.values().['field'])[index];
 
   will do the necessary trick.
 
   will do the necessary trick.
 
6. Now one can use for loop in python and assign every single DZ value to different variables(if one wishes so).
 
6. Now one can use for loop in python and assign every single DZ value to different variables(if one wishes so).
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Latest revision as of 13:52, 11 April 2011

How to extract a value from a table using python

Say you performed some calculation with your model and extracted your results in a table using POST_RELEVE_T. Lets say that table is named TBL.

This table is table of coordinate points and displacement values at nodes.

The table is something like :

NOEUD COOR_X COOR_Y COOR_Z DX DY DZ
N64 1.19966E+00 -1.15865E-05 -1.63838E-03 1.81394E-03 -2.07795E-03 1.04842E-02
N113 1.49962E+00 -1.11233E-05 -2.36240E-03 2.05956E-03 -3.07869E-03 1.53553E-02
N159 9.11231E-23 1.27977E-22 -1.81301E-23 0.00000E+00 0.00000E+00 0.00000E+00
N270 2.69957E+00 -1.25319E-05 -5.68127E-03 2.48677E-03 -7.80872E-03 3.84270E-02
N346 1.79960E+00 -1.15171E-05 -3.14862E-03 2.24653E-03 -4.18034E-03 2.07363E-02
N372 2.09958E+00 -1.14958E-05 -3.97566E-03 2.37691E-03 -5.36016E-03 2.64737E-02
N425 8.99711E-01 -1.07778E-05 -1.00118E-03 1.51058E-03 -1.22664E-03 6.28355E-03
N461 2.99957E+00 -1.31310E-05 -6.54018E-03 2.50928E-03 -9.04506E-03 4.44634E-02
N500 2.39957E+00 -1.20486E-05 -4.82397E-03 2.44765E-03 -6.57507E-03 3.24065E-02
N770 5.99787E-01 -1.29910E-05 -4.84976E-04 1.07209E-03 -5.34566E-04 2.96552E-03
N851 2.99877E-01 -1.43431E-05 -1.34048E-04 6.04560E-04 -7.56027E-05 7.79659E-04


Task : To extract DZ value at node N425.


1. Create a table using POST_RELEVE_T having required values(as shown above). Say that table is TBL. 

      TBL = POST_RELEVE_T(ACTION=(_F(OPERATION='EXTRACTION',   # For Extraction of values
                              INTITULE=Nodal Displacements[m], # Name of the table in .resu file
                              RESULTAT=RESU,                   # The result from which values will be extracted(STAT_NON_LINE)
                              NOM_CHAM=('DEPL',),              # Field to extract. DEPL = Displacements
                              NOM_CMP=('DX','DY','DZ',),       # Components of DISP to extract
                              GROUP_NO='DISP',                 # Extract only for nodes of group DISP
                              NUME_ORDRE=10,                   # STAT_NON_LINE calculates for 10 INST. I want only last INST
                          PAGINATION=('INTITULE',              # PAGINATION helps in formatting the table
                                      'RESU',                  # instead of explaining it, I will suggest you to run the code twice,
                                      'NOM_CHAM',              # first with PAGINATION and then by commenting the PAGINATION block
                                      'NUME_ORDRE',            # and check the resulting table in .resu file for both the cases.
                                      'INST',
                                      'ABSC_CURV',),
                              ),
                              ),
                              );

2. Now extract this table into a variable say VAR, by 

      VAR = TBL.EXTR_TABLE();

3. This variable VAR will have many attributes, values attribute is the one which is of our interest for this case. 

   VAR.values() is actually a python dictionary. For the above table, VAR.values() will look like :

   VAR.values() = {'NOEUD': ['N64     ', 'N113   ....],'COOR_X':[1.19......],'COOR_Y':[........],'COOR_Z':[.........],'DX':[........],'DY'[........],'DZ':[.........]}

  Now I will call 'NOEUD', 'COOR_X', 'COOR_Y', 'COOR_Z', 'DX', 'DY', 'DZ' as fields of the table.
  Note : Actual table will contain many other 'fields' such as 'INTITUTE', 'RESU',......

4. Now if I want to access DZ component of node N425 then, 

   (VAR.values().['DZ'])[6];
   This will give me value 6.28355E-03, which is what I want.

5. So now I can assign any variable name to it : 

   myvar =  (VAR.values().['field'])[index];
  will do the necessary trick.

6. Now one can use for loop in python and assign every single DZ value to different variables(if one wishes so).

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