如何在一个文件中调用使用另一个文件已更改的数据结构的方法？

Question

I wanted to call a method in one file that picks a random number from a list of numbers with a length defined by another file.

Here's what I currently have:

#file1
import file2

class Creator(object):
    def make_shape():
        return Shape(len(file2.sideList)) #takes a parameter of sides

shape = Creator.make_shape() #gets called after sideList is given a certain sequence

#file2
import random

sideList = []

for i in range(1, random.randint(1, 10)):
    sideList.append(i)

The obvious problem with the code above is that when file2 is imported, sideList is imported as [] instead of [1, 2, 3, etc]. So when the make_shape() method is called, the shape returned would be a shape with 0 sides.

So how could I "update" sideList in file2 so that I could call the make_shape() method using an "updated" version of file2.sideList?

Answer 1

Could you create a function in file 2 that accommodates your needs?

#file1.py
import file2

class Creator(object):
    def make_shape():
        return Shape(len(file2.sideList())) #takes a parameter of sides

shape = Creator.make_shape() #gets called after sideList is given a certain sequence

#file2.py
import random

def sideList():
    ret = []    
    for i in range(1, random.randint(1, 10)):
        ret.append(i)
    return(ret)

Edit:

 #file2.py
 import random

 def sideList():
     dataTarget = "__Data__.csv"
     if os.path.isfile(dataTarget):
          fh = open(dataTarget)
          ret = fh.read().split("\n")
     else:
          ret = []    
          for i in range(1, random.randint(1, 10)):
              ret.append(i)
          fh = open(dataTarget)
          fh.write(ret.join(\n))
     fh.close()
     return(ret)