Importing variables from another file

Question

How can I import variables from one file to another   example  file1 has the variables x1 and x2 how to pass them to file2   How can I import all of the variables from one to another

User · Answer

first py  a 5  second py  import first print first a   The result will be 5

User · Answer

Actually this is not really the same to import a variable with   from file1 import x1 print x1    and  import file1 print file1 x1    Altough at import time x1 and file1 x1 have the same value  they are not the same variables  For instance  call a function in file1 that modifies x1 and then try to print the variable from the main file  you will not see the modified value

User · Answer

Import file1 inside file2   To import all variables from file1 without flooding file2 s namespace  use   import file1   now use file1 x1  file2 x2      to access those variables   To import all variables from file1 to file2 s namespace  not recommended    from file1 import    now use x1  x2     From the docs      While it is valid to use from module import   at module level it is   usually a bad idea  For one  this loses an important property Python   otherwise has     you can know where each toplevel name is defined by a   simple    search    function in your favourite editor  You also open   yourself to trouble in the future  if some module grows additional   functions or classes

User · Answer

Marc response is correct  Actually  you can print the memory address for the variables print hex id libvar   and you can see the addresses are different     mylib py libvar   None def lib method        global libvar     print hex id libvar       myapp py from mylib import libvar  lib method import mylib  lib method   print hex id libvar    print hex id mylib libvar

User · Answer

script1 py  title  Hello world    script2 py is where we using script1 variable  Method 1   import script1 print script1 title    Method 2   from script1 import title print title

User · Answer

Best to import x1 and x2 explicitly   from file1 import x1  x2   This allows you to avoid unnecessary namespace conflicts with variables and functions from file1 while working in file2   But if you really want  you can import all the variables   from file1 import

User · Answer

In Python you can access the contents of other files like as if they  are some kind of a library  compared to other languages like java or any   oop base languages   This is really cool     This makes accessing the contents of the file or import it to to process   it or to do anything with it     And that is the Main reason why Python is highly preferred Language for   Data Science and Machine Learning etc     And this is the picture of project structure    Where I am accessing variables from  env file where the API links and   Secret keys reside    General Structure   from  lt File-Name gt  import

User · Answer

from file1 import       will import all objects and methods in file1

[python] Importing variables from another file?

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