Ansys command output processing¶
You can extract the output of Ansys.send command in multiple ways.
This example demonstrates these various methods.
In [1]:
from pansys import Ansys
In [2]:
a = Ansys(cleanup=True)
In [3]:
a.send('/prep7')
In [6]:
a.send("""
et,,185
et,,186
et,,187
""")
The output property¶
After any send command is executed, if you access the output
property of the Ansys object, you will get the output of the last
command.
Example shown below.
In [41]:
a.send("etlist")
print(a.output)
etlist
LIST ELEMENT TYPES FROM 1 TO 3 BY 1
ELEMENT TYPE 1 IS SOLID185 3-D 8-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 2 IS SOLID186 3-D 20-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 3 IS SOLID187 3-D 10-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
CURRENT NODAL DOF SET IS UX UY UZ
THREE-DIMENSIONAL MODEL
PREP7:
Live output¶
The output property is accessible only after the command is executed. So it becomes un-usable for commands which take a long time to execute and you want to see the progress live; eg: solution.
In such cases, you can use the silent keyword argument of the
send command as shown below.
In [8]:
a.send('etlist', silent=False)
etlist
LIST ELEMENT TYPES FROM 1 TO 3 BY 1
ELEMENT TYPE 1 IS SOLID185 3-D 8-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 2 IS SOLID186 3-D 20-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 3 IS SOLID187 3-D 10-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
CURRENT NODAL DOF SET IS UX UY UZ
THREE-DIMENSIONAL MODEL
PREP7:
The output_function¶
The send command also accepts another keyword arguement called the
output_function which accepts a function. The output of the send
command is passed to this function for further processing. By default,
the output_function is set to the print funtion and hence, the
output is printed out.
In the following example, a custom output_function is defined which
will convert all the text into lower case.
In [9]:
def output_proc(l):
print(l.lower())
In [12]:
a.send('etlist', silent=False, output_function=output_proc)
etlist
list element types from 1 to 3 by 1
element type 1 is solid185 3-d 8-node structural solid
keyopt( 1- 6)= 0 0 0 0 0 0
keyopt( 7-12)= 0 0 0 0 0 0
keyopt(13-18)= 0 0 0 0 0 0
element type 2 is solid186 3-d 20-node structural solid
keyopt( 1- 6)= 0 0 0 0 0 0
keyopt( 7-12)= 0 0 0 0 0 0
keyopt(13-18)= 0 0 0 0 0 0
element type 3 is solid187 3-d 10-node structural solid
keyopt( 1- 6)= 0 0 0 0 0 0
keyopt( 7-12)= 0 0 0 0 0 0
keyopt(13-18)= 0 0 0 0 0 0
current nodal dof set is ux uy uz
three-dimensional model
prep7:
You can notice that all the output was converted to lowercase letters.
Caveats of the output_function¶
The data transferred to the output function is not line by line. It depends on the refresh rate of ANSYS output and how quickly python is reading it in.
The below example demonstrates this issue.
In [25]:
def output_proc2(l):
print(l)
print('---------------------')
In [38]:
a.send('etlist', silent=False, output_function=output_proc2)
etlist
LIST ELEMENT TYPES FROM 1 TO 3 BY 1
ELEMENT TYPE 1 IS SOLID185 3-D 8-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 2 IS SOLID186 3-D 20-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 3 IS SOLID187 3-D 10-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
---------------------
---------------------
CURRENT NODAL DOF SET IS UX UY UZ
---------------------
THREE-DIMENSIONAL MODEL
---------------------
---------------------
PREP7:
---------------------
If the input to the output_function was line by line, you would have
seen ---------------------- after every line. But that is not the
case. This is because the output was read-in as chunks of multiple
lines. So, if you want to process line by line, then you will have to
split it yourselves by \r\n.
In [43]:
def output_proc3(l):
for line in l.split('\r\n'):
print(line)
print('---------------------')
In [44]:
a.send('etlist', silent=False, output_function=output_proc3)
etlist
---------------------
---------------------
LIST ELEMENT TYPES FROM 1 TO 3 BY 1
---------------------
---------------------
ELEMENT TYPE 1 IS SOLID185 3-D 8-NODE STRUCTURAL SOLID
---------------------
KEYOPT( 1- 6)= 0 0 0 0 0 0
---------------------
KEYOPT( 7-12)= 0 0 0 0 0 0
---------------------
KEYOPT(13-18)= 0 0 0 0 0 0
---------------------
---------------------
ELEMENT TYPE 2 IS SOLID186 3-D 20-NODE STRUCTURAL SOLID
---------------------
KEYOPT( 1- 6)= 0 0 0 0 0 0
---------------------
KEYOPT( 7-12)= 0 0 0 0 0 0
---------------------
KEYOPT(13-18)= 0 0 0 0 0 0
---------------------
---------------------
ELEMENT TYPE 3 IS SOLID187 3-D 10-NODE STRUCTURAL SOLID
---------------------
KEYOPT( 1- 6)= 0 0 0 0 0 0
---------------------
KEYOPT( 7-12)= 0 0 0 0 0 0
---------------------
KEYOPT(13-18)= 0 0 0 0 0 0
---------------------
---------------------
CURRENT NODAL DOF SET IS UX UY UZ
---------------------
THREE-DIMENSIONAL MODEL
---------------------
---------------------
PREP7:
---------------------
If you dont want live updates, you can always use the output
variable.
In [36]:
for line in a.output.split('\r\n'):
if 'element type ' in line.lower():
temp = [x.strip() for x in line.split()]
print(temp[2], temp[4], temp[5], temp[6])
1 SOLID185 3-D 8-NODE
2 SOLID186 3-D 20-NODE
3 SOLID187 3-D 10-NODE
Large outputs¶
If the output of your command is large and you dont want to keep the
entire thing in memory, then there is another method called
get_output which will write the output of any command passed to it
to a file.
In [45]:
etypes = a.get_output('etlist')
In [46]:
etypes
Out[46]:
'/home/yy53393/github/pansys/docs/_src/examples/pansys_20180712125145/out.out'
In [48]:
!cat $etypes
LIST ELEMENT TYPES FROM 1 TO 3 BY 1
ELEMENT TYPE 1 IS SOLID185 3-D 8-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 2 IS SOLID186 3-D 20-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
ELEMENT TYPE 3 IS SOLID187 3-D 10-NODE STRUCTURAL SOLID
KEYOPT( 1- 6)= 0 0 0 0 0 0
KEYOPT( 7-12)= 0 0 0 0 0 0
KEYOPT(13-18)= 0 0 0 0 0 0
CURRENT NODAL DOF SET IS UX UY UZ
THREE-DIMENSIONAL MODEL
As you can see, the get_output command wrote the output to a file
called out.out in your current working directory. This file will get
overwritten every time you use get_output. If you want to keep the
output file, you should set the persist keyword argument to true
which will produce a unique filename every time.
In [49]:
etypes = a.get_output('etlist', persist=True)
In [50]:
etypes
Out[50]:
'/home/yy53393/github/pansys/docs/_src/examples/pansys_20180712125145/e562762c-155f-466c-8970-3c0ee709c2ea'