# Вариант 1
s = ''
for p in parts:
    s += p

# Вариант 2
''.join(parts)

m = {'x': 2, 'y': 3}
s = '{x} + {y}'.format_map(m)
print(s)

class A:
    def __init__(self, x, y):
        self.x = x
        self.y = y
v = vars(A(2, 3))
print(sum(list(v.values())))

import re
data = b'A:B,C'
x = re.split(b'[:,]', data)[1].decode() 
print(x)

a = 111.46
b = round(a, -2)
c = round(a, 1)
print(b + c)

from decimal import Decimal
x = 4.2 + 2.1 == 6.3
y = Decimal('4.2') + Decimal('2.1') == Decimal('6.3')
print(x, y)

import math
nums = [1e+100, 1, -1e+100]
x = math.fsum(nums)
y = sum(nums)
print(x, y)

x = 10
a = format(x, 'b')
b = format(x, 'o')
c = format(x, 'x')
print(a, b, c)