Create Python object from different .py file

Question

In one file I create a class called Robot, but when I try to create an object of that class in another file it says:'module' object has no attribute 'Robot'

main.py

import robot as rob
robot=rob.Robot()

robot.py

class Robot(object):

    def __init__(self):
    return 0
    def otherFunctions():
    return 0

And it says: 'module' object has no attribute 'Robot'. Where I am making a mistake?

Answer 1

The way your code is written is correct (barring removal you've presumably made for conciseness)

When you import , Python checks sys.path for importing locations, and imports the first robot it can find.

A couple ways to solve this:

---

import robot
print robot.__file__

---

in robot.py

print("hello!")

---

import sys
sys.path.insert('/path/to/correct/robot/')
import robot

Answer 2

It seems like the syntax in your robot.py file is not correct. You can correct the errors in the most direct way by changing your robot.py file to look like this:

class Robot(object):
    def __init__(self):
        pass

    def other_functions(self):
        pass

Note that I used snake casing for the other_functions function. Don't use camelCasing in Python. It's not idiomatic. Also, I added a self argument to other_functions so you won't get a TypeError if you try to invoke it off of a Robot instance.

Also, unless your code is truly as simple as you present it, the error might be coming from a circular import. Make sure you're not trying to import the two modules from each other before they've had a chance to fully execute.