On 25/04/13 14:11, boB Stepp wrote:
In my on again, off again studies of Python I am stumped on something
that ought to be trivial, but I am not seeing it. When I run this
program (only the part up to where the error occurs is shown):
import random
numberToGuess = random.randint(1, 20)
numberOfGuesses = 0
print("Hello! What is your name?")
playerName = input()
...everything works fine from IDLE. However, in the Windows command prompt:
E:\Programs\Python\IYOCGwPy\Ch4>python -V
Python 3.3.1
Here you are explicitly calling "python". Windows searches the path for the
first version of Python it can find, and finds Python 3.3.1.
E:\Programs\Python\IYOCGwPy\Ch4>guess.py
Here you are telling Windows to look up the file association for .py files. It
locates some program, and runs it with guess.py as the argument. Looking at the
result:
Hello! What is your name?
boB
Traceback (most recent call last):
File "E:\Programs\Python\IYOCGwPy\Ch4\guess.py", line 13, in <module>
playerName = input()
File "<string>", line 1, in <module>
NameError: name 'boB' is not defined
this is obviously Python 2.x rather than 3.3.1. You can check that by putting
these two lines at the very beginning of the program:
import sys
print(sys.version)
My bet is that if you run it like this:
python guess.py
it will print "3.3.1" and the program will work, but when you run it like this:
guess.py
it will print 2.something and then fail.
E:\Programs\Python\IYOCGwPy\Ch4>
This has me totally puzzled. I thought it might have something to do
with the fact that I also have Python 2.7 installed, so I removed it
from the path variable and also did the check for version that you see
above.
There's your bunny. Just because you remove it from the search path doesn't
mean that Windows won't use it.
You might like to remove Python 2.7 altogether, or at least unassociate it from
the .py file extension.
--
Steven
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