从 Python sqlalchemy 连接对象和表名中获取表描述作为字符串

从一个sqlalchemy的连接对象和一个字符串形式的表名开始，我如何获得表属性，例如列名和数据类型.

例如，连接到sqlalchemy中的数据库

from sqlalchemy import create_engine
conn = create_engine('mssql+pyodbc://...driver=ODBC+Driver+17+for+SQL+Server').connect()

则conn是sqlalchemy连接对象

In [1]: conn
Out[1]: <sqlalchemy.engine.base.Connection at 0x7feb6efef070>

How do I get table properties based on a table name as a string, eg 100？

这should起作用，但创建了一个空的DataFrame

from sqlalchemy import text
import pandas as pd
query = f"""SELECT * FROM information_schema.columns WHERE table_name='{table}'"""
df = pd.read_sql_query(text(query), conn)

In [2]: df
Out[2]:
Empty DataFrame
Columns: [TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, COLUMN_NAME, ORDINAL_POSITION, COLUMN_DEFAULT, IS_NULLABLE, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION, NUMERIC_PRECISION_RADIX, NUMERIC_SCALE, DATETIME_PRECISION, CHARACTER_SET_CATALOG, CHARACTER_SET_SCHEMA, CHARACTER_SET_NAME, COLLATION_CATALOG, COLLATION_SCHEMA, COLLATION_NAME, DOMAIN_CATALOG, DOMAIN_SCHEMA, DOMAIN_NAME]
Index: []

versions:
sqlalchemy - 2.0.4
pandas - 1.5.3