Creating a graph that represents the timeline of stages

Question

I have the following structure:

[
  [
    {
      "build": {
        "end_time": 1633816733,
        "start_time": 1633816697
      }
    },
    {
      "test": {
        "end_time": 1633816797,
        "start_time": 1633816897
      }
    },
    {
      "run": {
        "end_time": 1633816997,
        "start_time": 1633817197
      }
    }
  ],
  [
    {
      "build": {
        "end_time": 1633816713,
        "start_time": 1633816612
      }
    },
    {
      "test": {
        "endt_time": 1633816717,
        "start_time": 1633816812
      }
    },
    {
      "run": {
        "end_time": 1633816917,
        "start_time": 1633817113
      }
    }
  ]
]

Each item in the main array contains a test I made for the benchmarking. It contain an array of stages and the time of each stage. There could be more than three stages (build,test,run).

I want to create the following graph (the graph does not represent the data above):

Basically, each line represents the stage time. For example, the first stage is build and it the length of the line is start_time-end_time but respectively to each other. In other words, the X axis represents the time but the duration so and respectively to the other stages. All of them start on the same point. For example for build we get 36 (first test) and 101 (second test) so the length of build line of the first test is shorter than the second one. The X axis value does not matter, it just needs to represent the length.

I'm usually using matplotlib module in Python to create graph but I could not find something similar in the docs. How do I create such graph using Python?

user_7326738 · Answer

You can use matplotlib:

import matplotlib.pyplot as plt
data = [[{'build': {'end_time': 1633816733, 'start_time': 1633816697}}, {'test': {'end_time': 1633816797, 'start_time': 1633816897}}, {'run': {'end_time': 1633816997, 'start_time': 1633817197}}], [{'build': {'end_time': 1633816713, 'start_time': 1633816612}}, {'test': {'end_time': 1633816717, 'start_time': 1633816812}}, {'run': {'end_time': 1633816917, 'start_time': 1633817113}}]]
colors = {'build':'b', 'test':'g', 'run':'r'}
for i, a in enumerate(data, 1):
   x, p = 20, []
   for j in a:
      p.extend([(x, x+(d:=abs(([*j.values()][0]['end_time'] - [*j.values()][0]['start_time'])))), (i, i), colors[[*j.keys()][0]]])
      x += d + 20
   plt.plot(*p)

plt.show()

Output:

Creating a graph that represents the timeline of stages

1 Answers