raise KeyError(key) KeyError: python matplotlib bar chart key error

Question

I have below data frame, on which am creating a chart,

The expectation is to create as below which is in excel,

But while defining the axis in matplotlib, am facing an issue,

import matplotlib.pyplot as plt
import pandas as pd
import random

def la_bar():
    
    df1 = pd.DataFrame(lst, columns=['source','type','date','count']) #lst is a data set
    ax = df.plot(x="date", y="count", kind="bar")
    df.plot(x="date", y="source", kind="bar", ax=ax)
    plt.savefig("static/images/image.png")
la_bar()

am getting key error as below,

    raise KeyError(key)
KeyError: 'date'

Any suggestion will be appreciated

Asked By: Jim Macaulay

||

Source

Answer 1

Use seaborn and barplot with hue parameter:

# pip install seaborn
import pandas as pd
import seaborn as sns
import matplotlib.pyplot

data = {
    'source': ['USA', 'UK', 'Germany'] * 2,
    'type': ['Country'] * 6,
    'date': ['1-Feb-23'] * 3 + ['10-Feb-23'] * 3,
    'count': [2, 1, 4, 3, 1, 2]
}
df = pd.DataFrame(data)

ax = sns.barplot(data=df.sort_values('source'), x='date', y='count', hue='source')
plt.show()

Output:

Answered By: Corralien

raise KeyError(key) KeyError: python matplotlib bar chart key error

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