Running Python scripts in linux

Question

I'm trying to run Python scripts with a shebang on Ubuntu. When I create a python script

    #! /usr/bin/env python
    import sys

... and run it I get a shell error:

    root@host:/home/user# ./test.py
    : No such file or directory

How can I make it work?

Solution: Remove '\r's from line endings with dos2unix.

Answer 1

I assume the script is executable? Also, check for carriage returns -- maybe windows got its dirty little hands on it? You can check this with 'cat -vE test.py' and look for '\r'.

Answer 2

You probably have windows line endings on your file. Please try running dos2unix on it.

Answer 3

Try removing the space between #! and /usr/bin/env, though I don't get why that would work when not importing packages...

Answer 4

Are you sure that the error is happening for the reason you think? Or are you (later in the script) trying to open a file? Start with the simplest case to get things working...

hello.py:

#!/usr/bin/env python
print "Hello, world"

then...

$ chmod +x hello.py
$ ./hello.py
Hello, world
$

Answer 5

Use the below one liners to remove the new line characters.

perl -e 's/\r//g' -w -p -i test.py

or

sed -e "s/^M//" test.py > test_new.py