我读取了一个yaml文件并将值提取到python列表中。我想将值转储到sqlite数据库中,并且列表的结构是嵌套的。我尝试了各种将数据存储在数据库中的方法,如下所示,但它们不能解决问题。
当格式为('a','b','c')的列表能够插入表格时,不会出现问题。但是当我有一个键值对时,就会遇到问题。
Data structure:
[ { 'CPU': 2,
'jobname': 'Job1',
'memory': '4 GB',
'problem': 'Prob1',
'team': '1'},
{ 'CPU': 4,
'jobname': 'Job2',
'memory': '256 GB',
'problem': 'Prob3',
'team': '3'},
{ 'CPU': 5,
'jobname': 'Job3',
'memory': '8 GB',
'problem': 'Prob5',
'team': '1'}]
这是我尝试过的方法,但看起来它们的数据结构略有不同:Python : How to insert a dictionary to a sqlite database?
# read data from the config file
def read_yaml(file):
with open(file, "r") as stream:
try:
config = yaml.safe_load(stream)
except yaml.YAMLError as exc:
print(exc)
print("\n")
return config
q = read_yaml("queue.yaml")
# establish connection to sqlite database and save into db
conn = sqlite3.connect('queues.db')
c = conn.cursor()
# create a sqlite3 database to store the dictionary values
def create_table():
c.execute("CREATE TABLE IF NOT EXISTS queues(job TEXT, team
TEXT, problem TEXT, CPU INT, memory TEXT)")
create_table()
# insert data into the table
def dynamic_data_entry():
for item in q:
c.execute("INSERT INTO queues VALUES (?, ?, ?, ?, ?)", item)
conn.commit()
dynamic_data_entry()
这是输出错误:追溯(最近一次呼叫过去):
File "queue_info.py", line 50, in <module>
dynamic_data_entry()
File "queue_info.py", line 47, in dynamic_data_entry
c.execute("INSERT INTO queues VALUES (?, ?, ?, ?, ?)", item)
sqlite3.ProgrammingError: Binding 1 has no name, but you supplied a
dictionary (which has only names).
答案 0 :(得分:1)
sqlite3
使用占位符语法:[key]
代替?
支持dictionaries。
您也可以使用executemany代替for item in q:
c.executemany("INSERT INTO queues (job, team, problem, CPU, memory) VALUES
(:jobname, :team, :problem, :CPU, :memory);", data)