why i can run python script using python not ./?

Question

Can anyone tell me why i can't run python using ./ but able to use python

-rwxr-xr-x@ 1 xxxx  staff   258 14 Nov 14:08 ltry.py
-rwxr-xr-x@ 1 xxxx  staff  1037 14 Nov 11:20 pdTry.py
 xxxx-MacBook-Pro:python xxxx$ ./ltry.py
 File "./ltry.py", line 10
 print "Hello you"
                 ^
 SyntaxError: invalid syntax
xxxx-MacBook-Pro:python xxxx$ python ltry.py
Hello you
['ltry.py']

Also, i installed python IDLE, but i wan't able to try print, why?

Python 3.3.0 (v3.3.0:bd8afb90ebf2, Sep 29 2012, 01:25:11) 
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "copyright", "credits" or "license()" for more information.
>>> print 'eeere'
SyntaxError: invalid syntax
>>> print "helooe"
SyntaxError: invalid syntax

Did chmod 755. you can see the permissions of my file. Also have #!/usr/local/bin/python3.3 -tt — Fish OnTray
– Fish OnTray, Commented Nov 14, 2012 at 22:53
@das_weezul In this case, both questions are probably really different manifestations of the same issue. — Silas Ray
– Silas Ray, Commented Nov 14, 2012 at 22:57

Silas Ray · Accepted Answer · 2012-11-14 23:10:26Z

5

For the second question, you are using Python 3.X there, where the syntax for printing was changed from the 2.X style you are using (print 'string' is print('string') in 3.X). My bet is that for the first question, you have 2 installations of Python on your machine, one 3.X, which is being called as the default program for .py files, and one 2.X, which is being called when you explicitly call python.

edited Nov 14, 2012 at 23:10

answered Nov 14, 2012 at 22:50

Silas Ray

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2 Comments

Fish OnTray Over a year ago

Thanks! so true, my mac come with python 2.7.2 and I installed 3.3 .... I guess i should delete one?

Silas Ray Over a year ago

@FishOnTray It's perfectly valid to have 2 installs on a machine, just make sure you know how they are configured and which gets run when.

das_weezul · Accepted Answer · 2012-11-14 22:54:40Z

0

For question one: Are you setting the right python interpreter path in the first line of your script starting with #!?

On my machine (Linux) that would be for example:

#!/usr/bin/python

answered Nov 14, 2012 at 22:54

das_weezul

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4 Comments

das_weezul Over a year ago

@Thomas: Thanks ;) Does that also work for @Fish? It seems he's using a mac.

Silas Ray Over a year ago

@das_weezul A Mac with OSX is just a Unix machine for twice the price.

das_weezul Over a year ago

@gnibbler@sr2222: So true XD

Fish OnTray Over a year ago

I have a mac. Unfortunately it didn't work for me. the only thing works for me so far is #!/usr/local/bin/python3.3 -tt, but i do have python in /usr/bin/python. may due to i have 2 copy of python though.

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