unix - For loop not working in expect sript -

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i have written expect script login server using ssh. but, when want same multiple servers using loop, doesnt work. below script:

    #!/usr/bin/expect     match_max 5000 set expect_out(buffer) {}  in `cat node_list.txt`  node_ip=`echo $i| awk -f"," '{print $1}'` node_initial_pwd=`echo $i| awk -f"," '{print $2}'`  spawn ssh root@$node_ip  expect { "*(yes/no)?" {send "yes\r";exp_continue} "'s password:" {send "$node_initial_pwd\r";exp_continue} "*current*" {send "$node_initial_pwd\r";exp_continue} "enter*" {send "jan2016!\r";exp_continue} "retype*" {send "jan2016!\r";exp_continue} "\\\$" { puts "matched prompt"} }  done
node_list.txt has ip's , passwords separated comma(,).

error this:

mayankp@mayankp:~/scripts/new$ ./connect-to-server.sh invalid command name "i" while executing "i" ("for" initial command) invoked within "for in `cat node_list.txt`" (file "./connect-to-server.sh" line 6)

can please me in achieving this? know mixing bash , expect here, have no clue how run loop in expect.

as say, mixing shell , expect syntax here. expect based on tcl, documentation of generic language commands can found @ http://www.tcl.tk/man/tcl/tclcmd/contents.htm .

a rough untested translation of loop trying write is

set inputchannel [open node_list.txt]  while {[gets $inputchannel line] != -1} {     set fields [split $line ,]     set node_ip [lindex $fields 0]     set node_initial_pwd [lindex $fields 1]      spawn ssh root@$node_ip      ...etc... }

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