Hi I'm a newbie in python programming. Please help me with this problem in python3:
pack.py
class one:
def test(self):
number = 100 ######I want to access this value and how?
print('test')
class two:
def sample(self):
print('sample')
another.py
from pack import *
class three:
def four(self):
obj = one()
print(obj.test())
###### I want to access the number value in this file and i don't know how #######
obj = three()
obj.four()
Here is an alternative pack.py
class One:
def __init__(self):
self.number = 100
def test(self):
print('test')
class Two:
def sample(self):
print('Sample')
another.py
from pack import *
class Three:
def four(self):
self.obj = One().number
return self.obj
three = Three().four()
print(three)
By what seems to be your approach, you were using classes to access variables. It is better to instantiate variables in a constructor ( init method in class One). Then import the class and access it in another class of another file.
Also, it is a good practice to name classes beginning with uppercase letters. There are more possible ways but hope it helps.
number needs to be in a global scope, that means outside of a function definition (it shouldn't be indented)
if the variable is inside a function it is impossible to get it in another file
pack.py
number = 100
def test():
test.other_number = 999 # here we assigne a variable to the function object.
print("test")
another.py
import pack
pack.test()
print(pack.number)
print(test.other_number) # this only works if the function has been called once
Alternatively if you are using classes:
pack.py
class Someclass():
other_number = 999 # here we define a class variable
def __init__(self):
self.number = 100 # here we set the number to be saved in the class
def test(self):
print(self.number) # here we print the number
another.py
import pack
somclass_instance = pack.Someclass() # we make a new instance of the class. this runs the code in __init__
somclass_instance.test() # here we call the test method of Someclass
print(somclass_instance.number) # and here we get the number
print(Someclass.other_number) # here we retrieve the class variable
numberis a function's local variable. It's not part of any class, and doesn't even exist unless the function is being executed. What are you trying to achieve here?