Check if a program exists from a python script [duplicate]

Answer 1

The easiest way is to try to run the program with the desired parameters, and handle the exception if it doesn't exist:

try:
    subprocess.call(["wget", "your", "parameters", "here"])
except OSError as e:
    if e.errno == errno.ENOENT:
        # handle file not found error.
    else:
        # Something else went wrong while trying to run `wget`
        raise

This is a common pattern in Python: EAFP