Python – Extract specific words (not keywords) from log files

I’m trying to extract some words from the following sample.txt as shown in the expected output and put them into a list. I’m having trouble extracting the correct fields. I’ve tried my method but it doesn’t work most of the time. I prefer to use python to do this, but open to other languages. Any pointers to other methods are greatly appreciated.

Sample .log

//*********************************************************************************
 update section
//*********************************************************************************
      for (i=0; i< models; i = i+1) begin:modelgen

model_ip model_inst
         (
          .model_powerdown(model_powerdown),
          .mcg(model_powerdown),
          .lambda(_lambda[i])
          );
      assign fnl_verifier_lock = (tx_ready & rx_ready) ? &verifier_lock :1'b0;

native_my_ip native_my_inst
     (
      .tx_analogreset(tx_analogreset),     
     .unused_tx_parallel_data({1536{1'b0}})

);

 END Section I : 
   //*********************************************************************************
   resync 
     #(
       . INIT_VALUE (1)
       ) inst_reset_sync 
       (
    .clk    (tx_coreclkin),
    .reset  (!tx_ready), // tx_digitalreset from reset 
    .d      (1'b0),
    .q      (srst_tx_common  )
    );

Expected output

model_ip
native_my_ip
resync

My attempt

import re

input_file = open("sample.log", "r")
result = []
for line in input_file:
    # need a more generic match condition to extract expected results 
    match_instantiation = re.match(r'\s(.*) ([a-zA-Z_0-9]+) ([a-zA-Z_0-9]+)_inst (.*)', line)

if match_instantiation:
    print match_instantiation.group(1)
    result.append(match_instantiation.group(1))
    else:
        continue

You may need to read more than one line at a time to determine whether the string is the module name
Or not.
Try the following:

import re

input_file = open("sample.log", "r")
lines = input_file.read()   # reads all lines and store into a variable
input_file.close()
for m in re.finditer(r'^\s*([a-zA-Z_0-9]+)\s+([a-zA-Z_0-9]+\s+\(|#\()', lines, re. MULTILINE):
    print m.group(1)

Produce:

model_ip
native_my_ip
resync

The regular expression above looks ahead of time for possible instance names or #(.

Hope this helps you.