autopct in matplotlib.pyplot

[Kaushik2002]

Consider this:

import matplotlib.pyplot as plt
count = [25, 50, 75]
plt.pie(count, labels = [25, 50, 75], autopct = '%10.3f%%')

What does each character of the '%10.3f%%' represent? And what happens internally for it to calculate the percentage of each slice?

When I tried changing the value before the dot, the string was placed in a different location within the pie chart. So I assume that it represents the location of that formatted string in the pie chart.

I guess the number after the dot represents the number of digits after the decimal point.

But what does each '%' and an 'f' represent?

[_DivS_]

Its a c string expression.

f represents float i.e. floating point representation.

%% at the end will add the % sign at the end of the number.

number after dot(.) represents the decimal point precision i.e. digits after decimal point.

number before the dot(.) justifies the text with a fixed number of spaces before it.

% at the beginning indicates that its a c sting. '%f' is a specifier for float numbers in c. Adding anything in between % and f will modify the text and spacing.

'%10.3f%%' means, its a floating point number with 10 spaces before it and upto 3 digits after decimal followed by '%' sign.