如何编写程序刚刚生成的python文件？

Question

I would like to know how do I write something in python file my program is generating. Here we have: hey.py and main.py . In hey.py there is:

import main

start = f"print('Hello {NAME}')\n print('or world')",

In the main.py I have:

import hey

NAME = input("Before starting , what is your name ? \n")
    namefile = input("okay , what should be the main file title ? \n")
    with open(namefile+".py", 'w') as f:
        f.write('{}'.format(start))

I would like to find in my python file just generated:

Hello Josh
or world

But unfortunately, my program can create the file but can't write in it:/

It's saying:

f.write('{}'.format(start))
NameError: name 'start' is not defined

Start is defined in hey.py. I imported. Have you any solution? Thanks for answering.

Answer 1

Couple of problems:

1. If importing like you have here, you need to use main.NAME and hey.start .

2. You're importing hey.py from main.py , and hey.py imports main.py . When a script is imported in Python, it is essentially run from top to bottom. This means that hey.start is only defined in hey.py after main.py is run, but main.py requires variables local to hey.py , specifically hey.start . The line that defines this variable hasn't been executed by the time main.py needs it.

Solution for the second problem is to remove import main and define

start = "print('hello {}')\n print('or world')"

instead. Then the formatting can be done in main.py as f.write(hey.start.format(NAME)

Answer 2

Maybe this code can be useful for you.

def create_file(namefile, text):
   pyfile = open(namefile,'r+')
   pyfile.write(text)
   pyfile.close()

create_file('example.py', 'print("{}")\nprint("{}")'.format('Hello Jhon','I am Joao from Peru'))

then run example.py