Library Modules practice questions

lineterminator='\n'

Why wrong: This may cause issues on Windows systems expecting \r\n.

lineterminator=os.linesep

Why wrong: Using os.linesep relies on the current system, which might not match the desired output format for other platforms.

lineterminator='\r'

Why wrong: This is only for legacy Mac systems.

xml.etree.ElementTree.read()

Why wrong: Not a valid method.

xml.etree.ElementTree.load_xml()

Why wrong: Not a valid method.

It automatically commits transactions.

Why wrong: Transactions still require an explicit commit.

It is faster to execute.

Why wrong: Performance is comparable to a tuple.

It supports multi-threading natively.

Why wrong: sqlite3 connections have specific threading limitations regardless of Row type.

parser = ConfigParser(case_sensitive=True)

Why wrong: The constructor does not accept a case_sensitive argument.

parser.set_case(True)

Why wrong: There is no set_case method.

parser.read(file, case='preserve')

Why wrong: The read method does not take a case argument.

csv.DictReader(f, headers=['a', 'b'])

Why wrong: The parameter is named 'fieldnames', not 'headers'.

csv.DictReader(f).map(['a', 'b'])

Why wrong: There is no map method on DictReader.

csv.DictReader(f, columns=['a', 'b'])

Why wrong: The parameter is named 'fieldnames', not 'columns'.

root.iter('item')

Why wrong: iter() searches the entire subtree, not just immediate children.

root.find('item')

Why wrong: find() only returns the first match.

root.get('item')

Why wrong: get() is used for attribute values.

element.attr('attr_name')

Why wrong: This is not a valid method.

element.getAttributeNode('attr_name').value

Why wrong: While this works, getAttribute is the direct and preferred method.

element.value('attr_name')

Why wrong: This is not a valid method.

element['attr_name']

Why wrong: DOM elements do not support dictionary-style access.

logging.config.dictConfig({'urllib3': 'WARNING'})

Why wrong: The dictionary structure requires more specific keys under 'loggers'.

logging.basicConfig(level=logging.WARNING)

Why wrong: This sets the global level, not per-library.

logging.setLevel('urllib3', logging.WARNING)

Why wrong: There is no such method in the logging module.

connection.save()

Why wrong: There is no save method on the connection object.

cursor.flush()

Why wrong: flush() is not a method of a sqlite3 cursor.

connection.close()

Why wrong: While closing the connection might auto-commit in some implementations, it is not the standard way to ensure changes are saved during script execution.

parser.get('section', 'option', type=bool)

Why wrong: The get method does not support a type conversion argument.

parser.get_bool('section', 'option')

Why wrong: The method is getboolean().

bool(parser.get('section', 'option'))

Why wrong: This would always return True for any non-empty string, even 'False'.

csv.reader(f, char=';')

Why wrong: There is no char parameter.

csv.reader(f, sep=';')

Why wrong: The parameter is named 'delimiter'.

csv.reader(f, quotechar=';')

Why wrong: quotechar is for the character used to quote fields.

ElementTree.XML()

Why wrong: XML() parses a string, not a file object.

ElementTree.load()

Why wrong: There is no load method.

ElementTree.read()

Why wrong: There is no read method.

logging.TRACE = 5

Why wrong: This does not register the level with the logging system's internal lookup tables.

logging.setLevel('TRACE', 5)

Why wrong: setLevel is for loggers, not defining new levels.

logging.define_level('TRACE', 5)

Why wrong: No such function exists.

It is required for SELECT queries only.

Why wrong: It is recommended for all query types.

It enables automatic commit behavior.

Why wrong: Placeholders do not affect transaction management.

It is faster to execute.

Why wrong: Performance is not the primary reason.

destination

Why wrong: The file path is specified via the 'filename' argument, not a destination key.

type

Why wrong: The key is 'class'.

handler_type

Why wrong: The key is 'class'.

It raises a FileNotFoundError.

Why wrong: The read() method is designed to fail silently for missing files.

It raises a configparser.Error.

Why wrong: It does not raise an exception.

It creates an empty configuration object.

Why wrong: It doesn't create the file, and the object remains empty if nothing was previously loaded.

It automatically converts the list to a comma-separated string.

Why wrong: It does not do this.

It works as expected.

Why wrong: It does not work for bulk insertion or 'IN' clauses without manual handling.

It only takes the first element of the list.

Why wrong: It does not implicitly slice the list.

find() is faster for large trees.

Why wrong: Performance depends on the specific path and tree size, not the method call.

findall() requires an iterator.

Why wrong: findall() returns a list object.

findall() is recursive, find() is not.

Why wrong: Both search the subtree; the difference is in the number of results and XPath compatibility.

Use a backslash at the end of each line.

Why wrong: Backslashes are not the standard way to indicate multiline values in INI files.

Wrap them in triple quotes ('''...''').

Why wrong: Configparser does not support triple-quoted strings natively.

Use the '\n' escape character.

Why wrong: Literal \n is not interpreted as a newline in the raw file.

element.content

Why wrong: This is not a valid attribute.

element.value

Why wrong: This is not a valid attribute.

element.get_text()

Why wrong: There is no such method.