Табулирование с использованием prettytable

from prettytable import PrettyTable
 
def f(x):
    if 0 <= x <= 1:
        return x
    elif 1 < x <= 2:
        return x**2
    elif 2 < x <= 3:
        return x**0.5
    else:
        return "не определена"
 
table = PrettyTable()
table.field_names = ["x", "f(x)"]
 
start = 0
end = 3.1  
step = 0.1
 
x = start
while x <= end:
    table.add_row([round(x, 1), f(round(x, 1))])  
    x += step
 
print(table)

from prettytable import PrettyTable
from math import isclose, sqrt
 
def f(x):
    if isclose(x, 0) or 0 < x < 1 or isclose(x, 1.0):
        return x
    if 1 < x < 2 or isclose(x, 2.0):
        return x ** 2
    if 2 < x < 3 or isclose(x, 3.0):
        return sqrt(x)
 
table = PrettyTable()
table.field_names = ['x', 'f(x)']
 
start = 0
end = 3.0
step = 0.1
 
x = start
while x < end or isclose(x, end):
    table.add_row([f'{x:.1f}', f'{f(x):.3f}'])
    x += step
print(table)