unable to use nested list as a parameter-CodePudding

am using nested lists with key to store tv channels' info, while the nested list works fin when using straight, but would cause an error if used as a parameter in a function here is sample of my code

print(get_List()[1]['name']) ---> output: Harley Davidson Racing TV (720p) [Not 24/7]

calling it from function

def get_AllName(list):
    channel_names = []
    x=0
    while x<len(list):
        channel_names.append(list()[x]['name'])
        x =1
    return channel_names
print(get_AllName(get_List()))

I get this error TypeError: 'list' object is not callable

CodePudding user response：

list, as a type, is actually a callable (contrary to what is suggested in the comments), and can be called as list() - it just returns an empty list though. So list()[x]['name'] is effectively [][x]['name'] and since the first list is empty, there's nothing to be indexed with x.

get_List() apparently returns a list of dictionaries, so to get a list of names:

def get_names(xs):
    return[x['name'] for x in xs]


print(get_names(get_List()))

Or, without the extra function:

print([x['name'] for x in get_List()])

CodePudding user response：

It is not a good idea to name variables with data types or special keywords. Instead of a list, try naming it as List or whole_list or something.

Your code will convert to:

def get_AllName(whole_list):
    channel_names = []
    x=0
    while x<len(whole_list):
        channel_names.append(whole_list[x]['name'])
        x =1
    return channel_names
print(get_AllName(get_List()))