data_hacks

Command line utilities for data analysis

Installing: pip install data_hacks

Installing from github pip install -e git://github.com/bitly/data_hacks.git#egg=data_hacks

Installing from source python setup.py install

data_hacks are friendly. Ask them for usage information with --help

histogram.py

A utility that parses input data points and outputs a text histogram

Example:

$ cat /tmp/data | histogram.py
# NumSamples = 29; Max = 10.00; Min = 1.00
# Mean = 4.379310; Variance = 5.131986; SD = 2.265389
# each * represents a count of 1
    1.0000 -     1.9000 [     1]: *
    1.9000 -     2.8000 [     5]: *****
    2.8000 -     3.7000 [     8]: ********
    3.7000 -     4.6000 [     3]: ***
    4.6000 -     5.5000 [     4]: ****
    5.5000 -     6.4000 [     2]: **
    6.4000 -     7.3000 [     3]: ***
    7.3000 -     8.2000 [     1]: *
    8.2000 -     9.1000 [     1]: *
    9.1000 -    10.0000 [     1]: *

ninety_five_percent.py

A utility script that takes a stream of decimal values and outputs the 95% time.

This is useful for finding the 95% response time from access logs.

Example (assuming response time is the last column in your access log):

$ cat access.log | awk '{print $NF}' | ninety_five_percent.py

sample.py

Filter a stream to a random sub-sample of the stream

Example:

$ cat access.log | sample.py 10% | post_process.py

run_for.py

Pass through data for a specified amount of time

Example:

$ tail -f access.log | run_for.py 10s | post_process.py

bar_chart.py

Generate an ascii bar chart for input data (this is like a visualization of uniq -c)

$ cat data | bar_chart.py --sort-keys
# each * represents a count of 2
19:0 [     1] 
19:1 [    24] ************
19:2 [     3] *
19:3 [     9] ****
19:4 [     5] **
19:5 [    41] ********************
20:0 [   115] *********************************************************
20:1 [   181] ******************************************************************************************
20:2 [   136] ********************************************************************
20:3 [   155] *****************************************************************************
20:4 [   150] ***************************************************************************
20:5 [    79] ***************************************
21:0 [    64] ********************************
21:1 [     8] ****

bar_chart.py also supports aggregated values. Simply provide a two column text file, space seperated and run like so:

$ cat ./data 
1 1
2 1
3 11
3 5
4 5
5 7
5 8
6 5
6 1
$ cat ./data | bar_chart.py -a
# each * represents a count of 1
1 [     1] *
2 [     1] *
3 [    16] ****************
4 [     5] *****
5 [    15] ***************
6 [     6] ******

This is very convenient if you pull data out, say Hadoop or MySQL already aggregated.