Python keys示例

示例#1

def list_records(username):
    result = []
    for k in  book.keys():
        record = book.record(k)
        if record['NAME'] == username:
            result.append(record)
    return result

示例#2

def print_records(username):
    for k in  book.keys():
        record = book.record(k)
        if record['NAME'] == username:
            print record['TEXT']

示例#3

def generator_records(username):
    for k in book.keys():
        record = book.record(k)
        if record['NAME'] == username:
            yield record

示例#4

def comprehensio_2_records(username):
    return (record for record in
            (book.record(k) for k in book.keys())
        if record['NAME'] == username)

示例#5

def comprehensio_1_records(username):
    return [record for record in
            [book.record(k) for k in book.keys()]
        if record['NAME'] == username]