Error when passing an array from tcl to python

Question

I have a tcl script tclname.tcl calling a python script (helloWorld3.py ) and passing an array

tclname.tcl :

set names(1) Jane
set names(2) Tom
set names(3) Elisabeth
set names(4) Robert
set names(5) Julia
set names(6) Victoria
set output [exec /home/Python-2.7.6/./python /home/mbenabu/vtf/tests/helloWorld3.py $names]

getting error: FATAL: can't read "names": variable is array

is it possible to pass an array from tcl to python?

Thanks,

What input is the python program expecting? A list of words in sys.argv? — glenn jackman
– glenn jackman, Commented Feb 23, 2015 at 11:50

Peter Lewerin · Accepted Answer · 2015-02-22 18:19:57Z

0

You can't get a value from an array. You can, however, get a list of keys ("names") and values by using array get:

set names(1) Jane
set names(2) Tom
set names(3) Elisabeth
set names(4) Robert
set names(5) Julia
set names(6) Victoria
array get names
# => 4 Robert 5 Julia 1 Jane 6 Victoria 2 Tom 3 Elisabeth

The order of the name-value pairs usually isn't equal to the order the values were set in.

Documentation: array

edited Feb 22, 2015 at 18:19

answered Feb 22, 2015 at 17:52

Peter Lewerin

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7 Comments

mba Over a year ago

I called the tcl procedure like: [exec /home/Python-2.7.6/./python /home/mbenabu/vtf/tests/helloWorld3.py [array get names]]

mba Over a year ago

now, in my python script helloWorld3.py I'm calling a different tcl procedure with this list: tcl.eval('GetRedhatRelease {%s} array' % sys.argv[1]) but GetRedhatRelease is expecting an array not a list.

mba Over a year ago

how can i overcome this issue?

Peter Lewerin Over a year ago

@mba: I'm not sure what tcl.eval can do, but if it can run a script and not just a command, maybe you can construct the names array inside that script instead of passing the key-value list into the python script?

mba Over a year ago

Yes, But i dont want to tuch the GetRedhatRelease script.

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