python - 在 python psycopg2 中通过列名检索值

Question

>>> import psycopg2
>>> tb = 'races';
>>> conn2 = psycopg2.connect(host='localhost',dbname=latest_prod_copy,port=5438)
>>> cursor2.execute(sql.SQL("SELECT * from {}").format(sql.Identifier(tb)))
>>> cursor2.description[0]
Column(name='id', type_code=23, display_size=None, internal_size=4, precision=None, scale=None, null_ok=None)
>>> cursor2.description[0][0]
'id'
>>> cursor2.description[0][1]
23

我的问题是如何通过键检索值？例如cursor2.description[0]->'type_code'，而不是cursor2.description[0][1]

http://initd.org/psycopg/docs/extensions.html#psycopg2.extensions.Column http://initd.org/psycopg/docs/cursor.html#cursor.description

Answer 1

cursor2.description[0] 是一个 psycopg2.extensions.Column 对象，您可以通过名称访问其字段，例如

cursor2.description[0].type_code