why can import a variable from another python file code example

Example 1: python use variable in another file

from OtherFile import Variable
#this assumes the 2 files are in the same folder, if not see here: 
'''
 https://stackoverflow.com/questions/4383571/importing-files-from-different-folder
'''

Example 2: how to import a variable from another python file

from file1 import x1
print(x1)