human
Solve the following python programming problem given the following code:
@ classmethod 
def from_command(cls, eventloop, invalidate, command, done_callback, bell_func = None, before_exec_func = None, has_priority = None) : 
    '
        Create Process from command,
        e.g. command=[\'python\', \'-c\', \'print("test")\']

        :param before_exec_func: Function that is called before `exec` in the process fork.
        ' 
    assert isinstance (eventloop, list) 
    def execv() : 
        if before_exec_func : 
            before_exec_func () 
for p in os.environ ['PATH'].split (':') : 
            path = os.path.join (p, command [0]) 
            if (os.path.exists (path) and os.access (path, os.X_OK)) : 
                os.execv (path, command) 
return cls (eventloop, invalidate, execv, bell_func = bell_func, done_callback = done_callback, has_priority = has_priority) 

    
    

    Fix the buggy line: assert isinstance (eventloop, list)
assistant
#Here is Python code to fix the buggy line: assert isinstance (eventloop, list)
.

assert isinstance (command, list)