python3基础08（exec、bytearray使用等）

#!/usr/bin/env python
# -*- coding:utf-8 -*-

str="test"
print(ascii(str))
a=bytearray("asdff",encoding='utf-8')
print(a)

b=bytearray(10)
print(b)

c=bytearray([1,1,3,6])
print(c)

d=complex("1+2j")
print(d)

a1="3*5+9"
a=compile(a1,'','eval')
print(eval(a))
print(a1)

py="print('this is a string')"
result=exec(py)
print(result)

x = 10
expr = """
z = 30
sum = x + y + z
print(sum)
"""
def func():
    y = 20
    exec(expr)
    exec(expr, {'x': 1, 'y': 2})
    exec(expr, {'x': 1, 'y': 2}, {'y': 3, 'z': 4})

func()