How do I check whether a file exists without exceptions?

Question

How do I check if a file exists or not, without using the try statement?

Answer 1

Adding one more slight variation which isn't exactly reflected in the other answers.

This will handle the case of the file_path being None or empty string.

def file_exists(file_path):
    if not file_path:
        return False
    elif not os.path.isfile(file_path):
        return False
    else:
        return True

Adding a variant based on suggestion from Shahbaz

def file_exists(file_path):
    if not file_path:
        return False
    else:
        return os.path.isfile(file_path)

Adding a variant based on suggestion from Peter Wood

def file_exists(file_path):
    return file_path and os.path.isfile(file_path):