本文整理汇总了Python中Orange.data.sql.table.SqlTable.sample_percentage方法的典型用法代码示例。如果您正苦于以下问题：Python SqlTable.sample_percentage方法的具体用法？Python SqlTable.sample_percentage怎么用？Python SqlTable.sample_percentage使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Orange.data.sql.table.SqlTable的用法示例。
在下文中一共展示了SqlTable.sample_percentage方法的1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: get_table
# 需要导入模块: from Orange.data.sql.table import SqlTable [as 别名]
# 或者: from Orange.data.sql.table.SqlTable import sample_percentage [as 别名]
#.........这里部分代码省略.........
"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
elif confirm.clickedButton() == sample_button:
table = table.sample_percentage(
AUTO_DL_LIMIT / table.approx_len() * 100)
else:
if table.approx_len() > MAX_DL_LIMIT:
QMessageBox.warning(
self, 'Warning', "Data is too big to download.\n")
return
else:
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:
return
table.download_data(MAX_DL_LIMIT)
table = Table(table)
return table