Popularity of Programming Languages

What programming languages do data scientists use?

This was one of the questions in the State of Data Science Reports published by Anaconda between 2020 and 2022. This data story shows the answers to this question.

import pandas as pd

from ipyvizzu import Data, Config, Style
from ipyvizzustory import Story, Slide, Step


# Create data object, read csv to data frame and add data frame to data object
data = Data()
df = pd.read_csv(
    "https://ipyvizzu-story.vizzuhq.com/0.12/examples/proglangs/proglangs.csv",
    dtype={"Year": str},
)
data.add_df(df, units={"Value": "%"})


# Create story object, add data to it
story = Story(data=data)

# Set the size of the HTML element
# that appears within the notebook
story.set_size("100%", "600px")

# Switch on the tooltip that appears
# when the user hovers the mouse over a chart element
story.set_feature("tooltip", True)

# Set a handler that prevents showing specific elements
label_handler_method = (
    "if(event.detail.text.split('%')[0] < 5) event.preventDefault()"
)
story.add_event("plot-marker-label-draw", label_handler_method)


# Each slide here is a page in the final interactive story
# Add the first slide
slide1 = Slide(
    Step(
        Data.filter("record.Year == 2022"),
        Config(
            {
                "x": ["Popularity", "Value"],
                "y": ["Language", "Year", "Lang_year"],
                "color": "Popularity",
                "label": "Value",
                "align": "stretch",
                "title": "Use of programming languages by data scientists in 2022",
                "lightness": "Year",
                "legend": "color",
            }
        ),
        Style(
            {
                "logo": {"width": "5em"},
                "plot": {
                    "xAxis": {"title": {"color": "#00000000"}},
                    "paddingLeft": "2.5em",
                    "marker": {
                        "colorPalette": "#3DAE2BFF "
                        + "#00833EFF "
                        + "#00A19BFF "
                        + "#0075A9FF "
                        + "#003764FF",
                        "minLightness": 0,
                        "maxLightness": 0.4,
                    },
                },
                "fontSize": "0.8em",
            }
        ),
    )
)
# Add the slide to the story
story.add_slide(slide1)

slide2 = Slide(
    Step(
        Config(
            {
                "split": True,
                "align": "none",
                "title": "Python is always or frequently used by 58%",
            }
        ),
        Style({"plot": {"xAxis": {"label": {"color": "#00000000"}}}}),
    )
)
story.add_slide(slide2)

slide3 = Slide()
slide3.add_step(
    Step(
        Config({"split": False, "align": "stretch"}),
        Style({"plot": {"xAxis": {"label": {"color": "#999999FF"}}}}),
    )
)
slide3.add_step(
    Step(
        Data.filter(
            """
            (record.Popularity == 'Always' || record.Popularity == 'Frequently') 
            && record.Year == 2022
            """
        ),
        Config({"x": {"range": {"max": 100}}, "align": "none"}),
    )
)
slide3.add_step(
    Step(
        Config(
            {
                "sort": "byValue",
                "title": "Python & SQL are the most popular by a huge margin",
            }
        )
    )
)
story.add_slide(slide3)

slide4 = Slide()
slide4.add_step(
    Step(
        Config(
            {
                "sort": "none",
                "title": "Let's focus on the six languages with data since 2020",
            }
        )
    )
)
slide4.add_step(
    Step(
        Data.filter(
            """
            (record.Popularity == 'Always' || record.Popularity == 'Frequently') 
            && (record.Language == 'R' || 
            record.Language == 'Python' || 
            record.Language == 'JavaScript' || 
            record.Language == 'Java' || 
            record.Language == 'C#' || 
            record.Language == 'C/C++') 
            && record.Year == 2022
            """
        ),
    )
)
slide4.add_step(
    Step(
        Config(
            {
                "y": ["Lang_year", "Year"],
                "x": ["Popularity", "Language", "Value"],
            }
        )
    )
)
story.add_slide(slide4)

slide5 = Slide()
slide5.add_step(
    Step(
        Data.filter(
            """
            (record.Popularity == 'Always' || record.Popularity == 'Frequently') 
            && (record.Language == 'R' || 
            record.Language == 'Python' || 
            record.Language == 'JavaScript' || 
            record.Language == 'Java' || 
            record.Language == 'C#' || 
            record.Language == 'C/C++') 
            && record.Year != 2020
            """
        ),
    )
)
slide5.add_step(
    Step(
        Data.filter(
            """
            (record.Popularity == 'Always' || record.Popularity == 'Frequently') 
            && (record.Language == 'R' || 
            record.Language == 'Python' || 
            record.Language == 'JavaScript' || 
            record.Language == 'Java' || 
            record.Language == 'C#' || 
            record.Language == 'C/C++')
            """
        ),
        Config(
            {
                "title": "C/C++, C#, Java and Javascript are gaining popularity"
            }
        ),
    )
)
story.add_slide(slide5)


# Play the created story!
story.play()