File Creation Not Working In A Thread Class?

[7stud]

bc90021 wrote:
> Hi All,
>
> Thanks in advance for any and all help!
>
> I have this code:
>
> g = open(fileName, 'a')
>
> where fileName is defined before the line it's used in.  It works fine
> when I use it outside a thread class.
>
> When I put the same line in a thread class, it no longer works, and I get
> an error:
>
> IOError: [Errno 2] no such file u'fileName'
>
> Are threads not allowed to create files?

...oh yeah:

import threading
import time

fname = "data.txt"
f = open(fname)
print f.read()
f.close()

f = open(fname, "a")
f.write("some text\n")
f.close()

f = open(fname)
print f.read()
f.close()


class MyThread(threading.Thread):
    def __init__(self, file_name):
        threading.Thread.__init__(self)

    def run(self):
        time.sleep(3)

        f = open(fname)
        print f.read()
        f.close()

        f = open(fname, "a")
        f.write("other text\n")
        f.close()

        f = open(fname)
        print f.read()
        f.close()


my_t = MyThread(fname)
my_t.start()
my_t.join()


--output:--
hello
world

hello
world
some text

hello
world
some text

hello
world
some text
other text