I have a file(test.txt) and content is as follows:

```
I0914 17:37:15.763941 29832 abc.cpp:138] Iteration 0, Testing (#0)
I0922 16:14:14.933842  2057 abc.cpp:176] Test score #0: 0.146329
I0914 17:37:15.763941 29832 abc.cpp:138] Iteration 1000, Testing (#0)
I0922 16:14:14.933842  2057 abc.cpp:176] Test score #0: 0.246222
I0914 17:37:15.763941 29832 abc.cpp:138] Iteration 2000, Testing (#0)
I0922 16:14:14.933842  2057 abc.cpp:176] Test score #0: 0.335429
I0914 17:37:15.763941 29832 abc.cpp:138] Iteration 3000, Testing (#0)
I0922 16:14:14.933842  2057 abc.cpp:176] Test score #0: 0.445429
I0914 17:37:15.763941 29832 abc.cpp:138] Iteration 4000, Testing (#0)
I0922 16:14:14.933842  2057 abc.cpp:176] Test score #0: 0.546429

```

and my question is how to get the number of iteration ( 0, 1000, 2000..., 4000) and test score ( 0.146329, 0.246222, 0.335429...., 0.546429) and combine them into dict.

For instance, my expected results are following:

```
dict = {'0':0.146329,
        '1000':0.246222
        '2000':0.335429
        '3000':0.445429
        '4000':0.546429}

```

Thanks in advance.