invalid syntax changing python file permission with chmod +x

#!/usr/bin/python3
chmod +x let.py
import sys

top 3 lines of program above then when I try to run ./let.py it will give me this error I am not sure why this isn't working

2

2 Answers

This command is an sh command. Type exit() to exit python and then you can type chmod +x let.py

1

Changing file permissions from python

As mentioned in a comment, just chmod is not a python command. Not sure which file you are trying to change permissions of, but do do that from python code, you've got two options:

1. Use os.chmod:

   #!/usr/bin/env python3
   import os
   # use 0o (zero + "o" before 755 to use octal)
   os.chmod('/path/to/file.py', 0o755)

2. Use subprocess:

   #!/usr/bin/env python3
   import subprocess
   subprocess.Popen(["chmod", "+x", "/path/to/file.py"])

Note:

For shebang, #!/usr/bin/env python3 is saver than #!/usr/bin/python3, which might break on other distros.

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