Imports

Importing variables/functions without executing the code

# file1
test = "hello"
def main():
  pass

if __name__ == "__main__":
  c = "hello"
     main()

# file2
from file1 import test
>> Main will not run!

Note: You cannot import c into file2 since the if __name__ == __main__ block is only executed when you run the Python program DIRECTLY. So technically, when you do imports, c is not even defined.

Importing Functions that Contain Global Variables

• Global variable in the file where the functions lives is what the variable will be defined as

# file: test.py
thing1 = 1
def hello():
  print(thing1)

# file: test1.py
from test import hello
thing1 = 4
hello()

# Running python3 test1.py
>> 1