本文整理汇总了Python中Orange.data.sql.table.SqlTable类的典型用法代码示例。如果您正苦于以下问题：Python SqlTable类的具体用法？Python SqlTable怎么用？Python SqlTable使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了SqlTable类的11个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_contingencies
def test_contingencies(self):
iris = SqlTable(self.conn, self.iris, inspect_values=True)
iris.domain = Domain(iris.domain[:2] + (EqualWidth()(iris, iris.domain['sepal width']),),
iris.domain['iris'])
conts = get_contingencies(iris)
self.assertEqual(len(conts), 3)
self.assertIsInstance(conts[0], Continuous)
self.assertIsInstance(conts[1], Continuous)
self.assertIsInstance(conts[2], Discrete)示例2: setUp
def setUp(self):
self.data = [
[1, 2, 3, None, 'm'],
[2, 3, 1, 4, 'f'],
[None, None, None, None, None],
[7, None, 3, None, 'f'],
]
self.table_uri = self.create_sql_table(self.data)
table = SqlTable(self.table_uri, guess_values=True)
variables = table.domain.variables
new_table = table.copy()
new_table.domain = domain.Domain(variables[:-1], variables[-1:])
self.table = new_table示例3: open_table
def open_table(self):
if self.tablecombo.currentIndex() <= 0:
return
if self.tablecombo.currentIndex() < self.tablecombo.count() - 1:
self.table = self.tablecombo.currentText()
else:
self.table = self.sqltext.toPlainText()
table = SqlTable(dict(host=self.host,
port=self.port,
database=self.database,
user=self.username,
password=self.password),
self.table,
inspect_values=False)
sample = False
if table.approx_len() > LARGE_TABLE and self.guess_values:
confirm = QMessageBox(self)
confirm.setIcon(QMessageBox.Warning)
confirm.setText("Attribute discovery might take "
"a long time on large tables.\n"
"Do you want to auto discover attributes?")
confirm.addButton("Yes", QMessageBox.YesRole)
no_button = confirm.addButton("No", QMessageBox.NoRole)
sample_button = confirm.addButton("Yes, on a sample",
QMessageBox.YesRole)
confirm.exec()
if confirm.clickedButton() == no_button:
self.guess_values = False
elif confirm.clickedButton() == sample_button:
sample = True
self.information(1)
if self.guess_values:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
if sample:
s = table.sample_time(1)
domain = s.get_domain(guess_values=True)
self.information(
1, "Domain was generated from a sample of the table.")
else:
domain = table.get_domain(guess_values=True)
QApplication.restoreOverrideCursor()
table.domain = domain
self.send("Data", table)示例4: execute_sql
def execute_sql(self):
self.sql = self.sqltext.toPlainText()
table = SqlTable.from_sql(
host=self.host,
database=self.database,
user=self.username,
password=self.password,
sql=self.sql)
self.send("Data", table)示例5: test_recovers_connection_after_sql_error
def test_recovers_connection_after_sql_error(self):
import psycopg2
conn, table_name = self.create_sql_table(
np.arange(25).reshape((-1, 1)))
sql_table = SqlTable(conn, table_name)
try:
broken_query = "SELECT 1/%s FROM %s" % (
sql_table.domain.attributes[0].to_sql(), sql_table.table_name)
with sql_table._execute_sql_query(broken_query) as cur:
cur.fetchall()
except psycopg2.DataError:
pass
working_query = "SELECT %s FROM %s" % (
sql_table.domain.attributes[0].to_sql(), sql_table.table_name)
with sql_table._execute_sql_query(working_query) as cur:
cur.fetchall()示例6: test_query_subset_of_attributes
def test_query_subset_of_attributes(self):
table = SqlTable(self.conn, self.iris)
attributes = [
self._mock_attribute("sepal length"),
self._mock_attribute("sepal width"),
self._mock_attribute("double width", '2 * "sepal width"')
]
results = list(table._query(
attributes
))
self.assertSequenceEqual(
results[:5],
[(5.1, 3.5, 7.0),
(4.9, 3.0, 6.0),
(4.7, 3.2, 6.4),
(4.6, 3.1, 6.2),
(5.0, 3.6, 7.2)]
)示例7: test_XY_large
def test_XY_large(self):
from Orange.data.sql.table import AUTO_DL_LIMIT as DLL
mat = np.random.randint(0, 2, (DLL + 100, 3))
conn, table_name = self.create_sql_table(mat)
sql_table = SqlTable(conn, table_name,
type_hints=Domain([], DiscreteVariable(
name='col2', values=['0', '1', '2'])))
self.assertRaises(ValueError, lambda: sql_table.X)
self.assertRaises(ValueError, lambda: sql_table.Y)
with self.assertRaises(ValueError):
sql_table.download_data(DLL + 10)
# Download partial data
sql_table.download_data(DLL + 10, partial=True)
assert_almost_equal(sql_table.X, mat[:DLL + 10, :2])
assert_almost_equal(sql_table.Y.flatten()[:DLL + 10], mat[:DLL + 10, 2])
# Download all data
sql_table.download_data()
assert_almost_equal(sql_table.X, mat[:, :2])
assert_almost_equal(sql_table.Y.flatten(), mat[:, 2])示例8: test_query_subset_of_rows
def test_query_subset_of_rows(self):
table = SqlTable(self.conn, self.iris)
all_results = list(table._query())
results = list(table._query(rows=range(10)))
self.assertEqual(len(results), 10)
self.assertSequenceEqual(results, all_results[:10])
results = list(table._query(rows=range(10)))
self.assertEqual(len(results), 10)
self.assertSequenceEqual(results, all_results[:10])
results = list(table._query(rows=slice(None, 10)))
self.assertEqual(len(results), 10)
self.assertSequenceEqual(results, all_results[:10])
results = list(table._query(rows=slice(10, None)))
self.assertEqual(len(results), 140)
self.assertSequenceEqual(results, all_results[10:])示例9: open_table
def open_table(self):
if self.tablecombo.currentIndex() <= 0:
return
if self.tablecombo.currentIndex() < self.tablecombo.count() - 1:
self.table = self.tablecombo.currentText()
else:
self.table = self.sqltext.toPlainText()
table = SqlTable(dict(host=self.host,
port=self.port,
database=self.database,
user=self.username,
password=self.password),
self.table,
inspect_values=False)
sample = False
if table.approx_len() > LARGE_TABLE and self.guess_values:
confirm = QMessageBox(self)
confirm.setIcon(QMessageBox.Warning)
confirm.setText("Attribute discovery might take "
"a long time on large tables.\n"
"Do you want to auto discover attributes?")
confirm.addButton("Yes", QMessageBox.YesRole)
no_button = confirm.addButton("No", QMessageBox.NoRole)
sample_button = confirm.addButton("Yes, on a sample",
QMessageBox.YesRole)
confirm.exec()
if confirm.clickedButton() == no_button:
self.guess_values = False
elif confirm.clickedButton() == sample_button:
sample = True
self.information(1)
if self.guess_values:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
if sample:
s = table.sample_time(1)
domain = s.get_domain(guess_values=True)
self.information(
1, "Domain was generated from a sample of the table.")
else:
domain = table.get_domain(guess_values=True)
QApplication.restoreOverrideCursor()
table.domain = domain
if self.download:
if table.approx_len() > MAX_DL_LIMIT:
QMessageBox.warning(
self, 'Warning', "Data is too big to download.\n"
"Consider using the Data Sampler widget to download "
"a sample instead.")
self.download = False
elif table.approx_len() > AUTO_DL_LIMIT:
confirm = QMessageBox.question(
self, 'Question', "Data appears to be big. Do you really "
"want to download it to local memory?",
QMessageBox.Yes | QMessageBox.No, QMessageBox.No)
if confirm == QMessageBox.No:
self.download = False
if self.download:
table.download_data(MAX_DL_LIMIT)
table = Table(table)
self.send("Data", table)示例10: get_table
def get_table(self):
curIdx = self.tablecombo.currentIndex()
if curIdx <= 0:
if self.database_desc:
self.database_desc["Table"] = "(None)"
self.data_desc_table = None
return
if self.tablecombo.itemText(curIdx) != "Custom SQL":
self.table = self.tables[self.tablecombo.currentIndex()]
self.database_desc["Table"] = self.table
if "Query" in self.database_desc:
del self.database_desc["Query"]
what = self.table
else:
what = self.sql = self.sqltext.toPlainText()
self.table = "Custom SQL"
if self.materialize:
import psycopg2 # pylint: disable=import-error
if not self.materialize_table_name:
self.Error.connection(
"Specify a table name to materialize the query")
return
try:
with self.backend.execute_sql_query("DROP TABLE IF EXISTS " +
self.materialize_table_name):
pass
with self.backend.execute_sql_query("CREATE TABLE " +
self.materialize_table_name +
" AS " + self.sql):
pass
with self.backend.execute_sql_query("ANALYZE " + self.materialize_table_name):
pass
except (psycopg2.ProgrammingError, BackendError) as ex:
self.Error.connection(str(ex))
return
try:
table = SqlTable(dict(host=self.host,
port=self.port,
database=self.database,
user=self.username,
password=self.password),
what,
backend=type(self.backend),
inspect_values=False)
except BackendError as ex:
self.Error.connection(str(ex))
return
self.Error.connection.clear()
sample = False
if table.approx_len() > LARGE_TABLE and self.guess_values:
confirm = QMessageBox(self)
confirm.setIcon(QMessageBox.Warning)
confirm.setText("Attribute discovery might take "
"a long time on large tables.\n"
"Do you want to auto discover attributes?")
confirm.addButton("Yes", QMessageBox.YesRole)
no_button = confirm.addButton("No", QMessageBox.NoRole)
if is_postgres(self.backend):
sample_button = confirm.addButton("Yes, on a sample",
QMessageBox.YesRole)
confirm.exec()
if confirm.clickedButton() == no_button:
self.guess_values = False
elif is_postgres(self.backend) and \
confirm.clickedButton() == sample_button:
sample = True
self.Information.clear()
if self.guess_values:
QApplication.setOverrideCursor(QCursor(Qt.WaitCursor))
if sample:
s = table.sample_time(1)
domain = s.get_domain(inspect_values=True)
self.Information.data_sampled()
else:
domain = table.get_domain(inspect_values=True)
QApplication.restoreOverrideCursor()
table.domain = domain
if self.download:
if table.approx_len() > AUTO_DL_LIMIT:
if is_postgres(self.backend):
confirm = QMessageBox(self)
confirm.setIcon(QMessageBox.Warning)
confirm.setText("Data appears to be big. Do you really "
"want to download it to local memory?")
if table.approx_len() <= MAX_DL_LIMIT:
confirm.addButton("Yes", QMessageBox.YesRole)
no_button = confirm.addButton("No", QMessageBox.NoRole)
sample_button = confirm.addButton("Yes, a sample",
QMessageBox.YesRole)
confirm.exec()
if confirm.clickedButton() == no_button:
return
#.........这里部分代码省略.........
示例11: connection_params
def connection_params():
return SqlTable.parse_uri(get_dburi())