Python 脚本don';t执行cur.execute()中的命令
我是postgresql和psycopg2的新手,我面临一个问题Python 脚本don';t执行cur.execute()中的命令,python,sql,postgresql,psycopg2,Python,Sql,Postgresql,Psycopg2,我是postgresql和psycopg2的新手,我面临一个问题 import psycopg2 def create_tables(whichone): in_str_station = "CREATE TABLE station (id SMALLINT NOT NULL PRIMARY KEY, name VARCHAR(40) NOT NULL," \ " country VARCHAR(3) NOT NU
import psycopg2
def create_tables(whichone):
in_str_station = "CREATE TABLE station (id SMALLINT NOT NULL PRIMARY KEY, name VARCHAR(40) NOT NULL," \
" country VARCHAR(3) NOT NULL, latitude VARCHAR(10), " \
"longitude VARCHAR(10),height SMALLINT);"
in_str_dailyData = "CREATE TABLE daily_data (id BIGSERIAL NOT NULL PRIMARY KEY," \
"s_id SMALLINT NOT NULL REFERENCES station(id)," \
"d_date DATE NOT NULL, d_mean NUMERIC(6, 1), quality SMALLINT);"
int_str_monthlyMean = "CREATE TABLE monthly_mean (id BIGSERIAL NOT NULL PRIMARY KEY,"\
"s_id SMALLINT NOT NULL REFERENCES station(id),"\
"m_date DATE NOT NULL, m_mean NUMERIC(9, 3),"\
"var NUMERIC(9, 3), std NUMERIC(9, 3));"
in_str_yearlymean = "CREATE TABLE yearly_mean (id BIGSERIAL NOT NULL PRIMARY KEY, " \
"s_id SMALLINT NOT NULL REFERENCES station(id)," \
"y_date DATE NOT NULL, y_mean NUMERIC(9, 3),var NUMERIC(9, 3)," \
"std NUMERIC(9, 3), var_m NUMERIC(9, 3), std_m NUMERIC(9, 3));"
database_list = {'station': in_str_station, 'monthly_mean': int_str_monthlyMean,
'daily_data': in_str_dailyData, 'yearly_mean': in_str_yearlymean}
try:
conn = psycopg2.connect(
host="localhost",
database="climate",
user="postgres",
password="1")
cur = conn.cursor()
in_str = database_list.get(whichone)
cur.execute(in_str)
output_ = cur.fetchall()
print(output_)
cur.close()
except (Exception, psycopg2.DatabaseError) as error:
print(error)
finally:
if conn is not None:
conn.close()
在我运行脚本no meter之后,没有创建哪个in_str_uichoose表。我已经检查过了,当我复制我在cur.execute中执行的in_str的内容并在postgre shell中使用它时,一切正常。
你能告诉我哪里出错了吗?
提前谢谢我不知道你刚才是否这么做了,但缩进错误了。您需要在函数后缩进代码
def foo(a):
pass
调用conn.commit()
在cur.execute()
之后,但在conn.close()之前。与psycopg2的事务:
如果在事务进行过程中连接被关闭(使用close()方法)或破坏(使用del或使其脱离范围),服务器将丢弃该事务
哦,很抱歉,我在粘贴代码时出错了。代码定义了create_tables()函数,但没有调用它。如果您有其他实际调用它的代码,请显示该代码。好的,谢谢,在我在cur.execute()之后添加此代码后,它可以工作