Using multiple versions of Python

user_1937539 0
Viewed 23816

I have both Python 3.3 and Python 2.7 installed on my computer. The python 3.3 works fine, but when I try to run something using python 2.7, it is still referencing python 3.3.

For Example: if I type F:\Python33\python33.exe test1.py, it will run with 3.3 and work fine, but if I type F:\Python27\python27.exe test1.py it gives this error: 

File "F:\PYTHON33\LIB\site.py", line 173
    file=sys.stderr)
        ^
SyntaxError: invalid syntax

Note: I have renamed the Python 2.7 and 3.3 .exe's to python27.exe and python33.exe respectively.

Any help would be appreciated, Thank you.

python-2.7 python-3.x windows python
7 Answers

You will get issue if multipler version of python is set

File "F:\PYTHON33\LIB\site.py", line 173 file=sys.stderr) ^ SyntaxError: invalid syntax

To fix this issue remove previous version python set in system environment variable enter image description here

user_51604940

Setting the PYTHONPATH environment variable to nothing fixed this issue for me.

user_9413970

I received the same error when I was running my python file using python filename.py my PYTHONPATH was set to use python3

I fixed it by using the below command to run my file

python3 filename.py
user_38535890
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