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How to group lines which have same pattern in a list using TCL

How to group lines which have same pattern in a list using TCL

How to group lines which have same pattern in a list using TCL

(OP)
Hi,

I have a file with content
AXI_STR_RXD_TREADY O undef TRUE true true
AXI_STR_TXC_TDATA O undef TRUE 31 0
AXI_STR_TXC_TKEEP O undef TRUE 3 0
AXI_STR_TXC_TLAST O undef TRUE true true
AXI_STR_TXC_TVALID O undef TRUE true true
AXI_STR_TXD_TDATA O undef TRUE 31 0
AXI_STR_TXD_TDEST O undef TRUE 3 0
AXI_STR_TXD_TKEEP O undef TRUE 3 0
AXI_STR_TXD_TLAST O undef TRUE true true
AXI_STR_TXD_TVALID O undef TRUE true true
S_AXI_ARREADY O undef TRUE true true
S_AXI_AWREADY O undef TRUE true true
S_AXI_BRESP O undef TRUE 1 0
S_AXI_BVALID O undef TRUE true true
S_AXI_RDATA O undef TRUE 31 0
S_AXI_RRESP O undef TRUE 1 0
S_AXI_RVALID O undef TRUE true true
S_AXI_WREADY O undef TRUE true true

I would like to have your help to write a TCL script that can group list of lines that have same pattern , for example AXI_STR_TXC in a list. The script should work for any pattern , for example 2 lines aaa_xxxx_222_bbb , and aaa_xxxx_2222ccc should be grouped
Thank you very much
Have nice day
Tony

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