How to pass variable to Python package?

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Python3.6

so yes - package is in python's directory (probably somewhere in /usr , yes i use linux). file (python script) where variable'd be setted will be xyz.py in home directory (probably ~/ ). how can i make it so package will get variable contents and name to pass for inside functions?

What I have tried:

package (example, take its name as xyz.py in environment variable)

global x
file = open(x , "r")
extension = file.suffix
if extension == '.textmd':

    Bold = re.search('<bold>(.*)<bold;>', file).group(1)
    Italic = re.search('<italic>(.*)<italic;>', file).group(1)
    Underline = re.search('<underline>(.*)<underline;>', file).group(1)
    Crossout = re.search('<crossout>(.*)<crossout;>', file).group(1)

    # ... blah blah blah the rest of code

else:
    raise Error("invalid file !!!")

file im working in :

import xyz

global x
x = "testing.file"
print(Italic)

yes i know this example contains some other things but generally variables cant match.