Python NameError: global name 'Thread' is not defined

Question

I made file called thread.py and if I want to import it, it doesn't work. When I use a filename like cheese.py it works fine

import json
from thread import Thread
class Board:
        name = ""
        shortcode = ""
        threads = []
        url = ""
        api_url = ""
        json = ""

        def __init__(self, board, api_url, json):
                self.shortcode = board
                self.api_url = api_url
                self.json = json
                self.__getPosts()

        def __getPosts(self):
                i = 0
                for thread in self.json[0]['threads']:
                        thread = Thread()
                        self.threads[i] = thread
                        i+=1

thread.py

class Thread:
        def __init__(self):
                i = 1

changing thread.py filename will help

J Bourne
– J Bourne

2015-03-05 09:04:41 +00:00
Commented Mar 5, 2015 at 9:04 — J Bourne
– J Bourne, Commented Mar 5, 2015 at 9:04

jesterjunk · Accepted Answer · 2015-06-01 08:31:56Z

5

A built-in module with the name thread already exists.

>>> import thread
>>> thread
<module 'thread' (built-in)>

When you are trying to import using from thread import Thread it is trying to search for the attribute named Thread which does not exists in the built-in thread module.

>>> hasattr(thread, 'Thread')
False

When a module named spam is imported, the interpreter first searches for a built-in module with that name. If not found, it then searches for a file named spam.py in a list of directories given by the variable sys.path.

sys.path is initialized from these locations:

The directory containing the input script (or the current directory).
PYTHONPATH (a list of directory names, with the same syntax as the shell variable PATH).
The installation-dependent default.

For more here

It is recommended that you use a user defined module name that is different than the built-in module name.

edited Jun 1, 2015 at 8:31

jesterjunk

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answered Mar 5, 2015 at 9:02

Tanveer Alam

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2 Comments

Mirage Over a year ago

Is it possible to override this so I don't need to rename my class?

Tanveer Alam Over a year ago

You don't need to rename your class, you have to rename your module thread.py to something like mythread.py or something relevant to you .

Johnny · Accepted Answer · 2018-10-31 13:13:59Z

-1

Python 3 has a built in module Threading that has a class called Thread

which is causing the conflict, so consider renaming your file to something else.

answered Oct 31, 2018 at 13:13

Johnny

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