Importing a long list of constants to a Python file
Question: In Python, is there an analogue of the `C` preprocessor statement such as?:

`#define MY_CONSTANT 50`

Also, I have a large list of constants I'd like to import to several classes.
Is there an analogue of declaring the constants as a long sequence of
statements like the above in a `.py` file and importing it to another `.py`
file?

Edit.

The file `Constants.py` reads:

    
    
    #!/usr/bin/env python
    # encoding: utf-8
    """
    Constants.py
    """
    
    MY_CONSTANT_ONE = 50
    MY_CONSTANT_TWO = 51
    

And `myExample.py` reads:

    
    
    #!/usr/bin/env python
    # encoding: utf-8
    """
    myExample.py
    """
    
    import sys
    import os
    
    import Constants
    
    class myExample:
        def __init__(self):
            self.someValueOne = Constants.MY_CONSTANT_ONE + 1
            self.someValueTwo = Constants.MY_CONSTANT_TWO + 1
    
    if __name__ == '__main__':
        x = MyClass()
    

Edit.

From the compiler,

> NameError: "global name 'MY_CONSTANT_ONE' is not defined"
>
> function **init** in myExample at line 13 self.someValueOne =
> Constants.MY_CONSTANT_ONE + 1 copy output Program exited with code #1 after
> 0.06 seconds.


Answer: Python isn't preprocessed. You can just create a file `myconstants.py`:

    
    
    MY_CONSTANT = 50
    

And importing them will just work:

    
    
    import myconstants
    print myconstants.MY_CONSTANT * 2
    

