What is the purpose of usr bin python on the first line in the above code

Question

Hello Team,

I am a new beginner with python and I am posting my code below, but can anyone help me to explain why ​#!/usr/bin/python​on the first line in the above code has been used?

#!/usr/bin/python
deffoo(x=[]):
x.append(1)
returnx
foo()
foo()

Output:
[1]
[1,1]

Answer 1

Hey, @Roshni,

By specifying #!/usr/bin/python you specify exactly which interpreter will be used to run the script on a particular system. This is the hardcoded path to the python interpreter for that particular system. 

The advantage of this line is that you can use a specific python version to run your code.