Robinson, Wendy wrote:
> Hi there,
> I installed Python 3.5.0 64-bit for Windows yesterday and tried some basic
> programs successfully.
> This morning I rebooted my computer and can't get a single one to work.
> The interpreter seems to be fine and the environment variables look
> correct. But every py file I try to run at the >>> prompt gives me a
> NameError.
>
> I tried running the Repair installation, but that did not help.
>
> Any suggestions?
If you want to run a python script you have to invoke it on the commandline,
not inside the interactive interpreter, i. e. if you have a script
myscript.py containing the line
print("Hello world!")
Wrong:
C:\> python3
>>> myscript.py
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'myscript' is not defined
Here python looks for a variable "myscript" which of course isn't defined.
(If it were the next step would be to look for an attribute "py" and you'd
probably get an AttributeError)
Right:
C:\> python3 myscript.py
Hello world!
Here python runs the script and exits.
If you have a function defined in a module that you want to use from the
interactive interpreter you have to import the module. Assuming mymodule.py
contains the function
def say_hello():
print("Hello world!")
C:\> python3
>>> import mymodule
>>> mymodule.say_hello()
Hello world!
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