python - Invalid syntax. I save my text file on my desktop calling it file. -

create graph:-

def loadgraphfile(file):     graph = []     line in file:         contents = line.split()         moviename = contents[0]         actornames = [contents[i]+ " " + contents[i+1] in range(1, len(contents), 2)]                 movienode = findnode(graph, moviename)         if movienode == none:             movienode = mknode(moviename)             graph.append(movienode)         actorname in actornames:                         actornode = findnode(graph,actorname)         if actornode == none:             actornode = mknode(actorname)             graph.append(actornode)         actornode.neighbor.append(movienode)         movienode.neighbor.append(actornode)         return graph  def loadgraphfilename('file.text'):    return loadgraphfile(open('file.text')) 

you declared function wrong:

def loadgraphfilename('file.text'):  # change    return loadgraphfile(open('file.text')) 

to this:

def loadgraphfilename():  # don't use anyway    return loadgraphfile(open('file.text')) 

or:

def loadgraphfilename(filename='file.text'):  # file.text default. if give parameter it, filename change parameter    return loadgraphfile(open(filename)) # , use here