Python : Extract one string from 100 lines of text
<ol>
<li><p>I need to extract a particular string from 100 lines of log data. I
tried split and then tried to get the needed string but couldn't
succeed. Any suggestions/help appreciated. Thanks!</p>

<p>In the log below, I would like to extract the highlighted part, that
is
<strong>zqn.2005- 04.com.sanblaze:virtualun.init74-2.initiator-00000000-0000</strong>  (its in line 57)</p>

<pre><code>1         Out[19]:
2         {'portstatus': {'errors': {'busy_errors': '0',
3         'checkcondition_errors': '0',
4         'compare_errors': '0',
5         'ioc_errors': '0',
6         'notready_errors': '0',
7         'read_errors': '0',
8         'read_retries': '0',
9         'scsi_errors': '0',
10         'test_errors': '0',
11         'timeout_errors': '0',
12         'write_errors': '0',
13         'write_retries': '0'},
14         'net_counters': {'RxBytes': '148476788547060',
15         'RxCompressed': '0',
16         'RxDrop': '96188',
17         'RxErrs': '0',
18         'RxFIFO': '0',
19         'RxFrame': '0',
20         'RxMulticast': '259513',
21         'RxPFCPause': '0',
22         'RxPackets': '77165581759',
23         'RxStandardPause': '0',
24         'TxBytes': '20440169002909',
25         'TxCompressed': '0',
26         'TxDrop': '0',
27         'TxErrs': '0',
28         'TxFIFO': '0',
29         'TxFrame': '0',
30         'TxMulticast': '0',
31         'TxPFCPause': '0',
32         'TxPackets': '55075507366',
33         'TxStandardPause': '5349727',
34         'net_avgriops': '0',
35         'net_avgrrate': '0.00',
36         'net_avgtiops': '0',
37         'net_avgtrate': '0.00',
38         'net_riops': '0',
39         'net_rrate': '0.00',
40         'net_tiops': '0',
41         'net_trate': '0.00'},
42         'perfdata': {'avg_oiocnt': '0',
43         'avgiops': '0',
44         'avgriops': '0',
45         'avgrrate': '0.00',
46         'avgtrate': '0.00',
47         'avgwiops': '0',
48         'avgwrate': '0.00',
49         'iops': '0',
50         'max_oiocnt': '509',
51         'oiocnt': '0',
52         'riops': '0',
53         'rrate': '0.00',
54         'trate': '0.00',
55         'wiops': '0',
56         'wrate': '0.00'},
57         'status': {'initiator0_iqn': 'zqn.2005- 04.com.sanblaze:virtualun.init74-2.initiator-00000000-0000',
58         'initiator10_iqn': 'zqn.2005-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0010',
59         'initiator11_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0011',
60         'initiator12_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0012',
61         'initiator13_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0013',
62         'initiator14_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0014',
63         'initiator15_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0015',
64         'initiator16_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0016',
65         'initiator17_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0017',
66         'initiator18_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0018',
67         'initiator19_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0019',
68         'initiator1_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0001',
69         'initiator20_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0020',
70         'initiator21_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0021',
71         'initiator22_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0022',
72         'initiator23_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0023',
73         'initiator24_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0024',
74         'initiator25_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0025',
75         'initiator26_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0026',
76         'initiator27_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0027',
77         'initiator28_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0028',
78         'initiator29_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0029',
79         'initiator2_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0002',
80         'initiator30_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0030',
81         'initiator31_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0031',
82         'initiator32_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0032',
83         'initiator33_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0033',
84         'initiator34_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0034',
85         'initiator35_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0035',
86         'initiator36_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0036',
87         'initiator37_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0037',
88         'initiator38_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0038',
89         'initiator39_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0039',
90         'initiator3_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0003',
91         'initiator40_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0040',
92         'initiator41_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0041',
93         'initiator42_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0042',
94         'initiator43_iqn': 'iqn.2003-04.com.sanblaze:virtualun.init74-2.initiator-00000000-0043',
95         'mode': 'Init',
96         'numinitiators': '50',
97         'numtargets': '0',
98         'port': '0',
99         'portwwnn': '90:e2:ba:82:92:1c',
100         'portwwpn': '90:e2:ba:82:92:1c',
101         'speed': '10G',
102         'state': 'Online',
103         'topo': 'iSCSI'},
104         'sympn': '-',
</code></pre></li>
</ol>

<p>Looks like the string is in dictionary format (correct me if I'm wrong), so you could try converting it to one. Then you won't need regex.</p>

<pre><code>import ast
your_dict = ast.literal_eval(your_string)
</code></pre>

<p>Then what you want would be: </p>

<pre><code>your_dict['status']['initiator0_iqn']
</code></pre>

python regex logging