Difference between revisions of "OPS435 Python Exercise 1"
(→Read a single line from a text file) |
(→Split a single line into words and store all the words in a list) |
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print(word_list) # <-- you should see the list of word when this line is executed | print(word_list) # <-- you should see the list of word when this line is executed | ||
| + | </pre> | ||
| + | Output from the above print() function: | ||
| + | <pre> | ||
| + | ['rchan', 'pts/9', '10.40.91.236', 'Tue', 'Feb', '13', '16:53:42', '2018', '-', 'Tue', 'Feb', '13', '16:57:02', '2018', '(00:03)'] | ||
</pre> | </pre> | ||
Revision as of 21:10, 21 June 2018
Contents
Objectives
- read a single line from a text file
- split a single line into words and store all the words in a list
- combine selected items from a list to make useful data object
- manipulate data objects: date, time, user name, host IP
Read a single line from a text file
- file name: test_data_0
- contents:
[rchan@centos7 ex1]$ cat test_data_0 rchan pts/9 10.40.91.236 Tue Feb 13 16:53:42 2018 - Tue Feb 13 16:57:02 2018 (00:03) asmith pts/2 10.43.115.162 Tue Feb 13 16:19:29 2018 - Tue Feb 13 16:22:00 2018 (00:02) tsliu2 pts/4 10.40.105.130 Tue Feb 13 16:17:21 2018 - Tue Feb 13 16:30:10 2018 (00:12) mshana pts/13 10.40.91.247 Tue Feb 13 16:07:52 2018 - Tue Feb 13 16:45:52 2018 (00:38)
Python Code to read a single line (first line) from a file:
file_name = 'test_data_0' f = open(file_name,'r') line_in = f.readline() print(line_in)
Output of the above python code:
rchan pts/9 10.40.91.236 Tue Feb 13 16:53:42 2018 - Tue Feb 13 16:57:02 2018 (00:03)
Split a single line into words and store all the words in a list
Python code to split the line "line_in" into words:
word_list = line_in.split() # <-- split the line into words using space
# store all the words as a list to word_list
print(word_list) # <-- you should see the list of word when this line is executed
Output from the above print() function:
['rchan', 'pts/9', '10.40.91.236', 'Tue', 'Feb', '13', '16:53:42', '2018', '-', 'Tue', 'Feb', '13', '16:57:02', '2018', '(00:03)']
