def a():
print("I am from main function a")
a()
# case 1 : import module by name
import dio as d
import tria as t
d.a()
t.a()
print(d.x,d._x,t.x, t._x)
#function/variable都係地址
# case 2 : from module import * , import everything except _
from dio import *
a()
print(x) #留意用*係所有野會過到黎, 除左_係過唔到黎, 所以過唔到dio.py入面既_x
from tria import *
a()
print(x)
# case 3 : from module import a, selection import, run through modules<--多數用呢個, 可以選擇性去簡, 唔好浪費咁多name space
from dio import x, _x
from tria import a
a()
print(x,_x)
def a():
print("I am from dio's function a")
x = 1
_x = 10
def a():
print("I am from tria's function a")
x = 2
_x = 20
