class Database():
def __init__(self):
self.tables = {}
self.my_manager = DiskManager()
self.my_manager.my_database = self
pass
def open(self, path):
self.my_manager.set_path(path)
self.my_manager.open_db()
pass
def close(self):
self.my_manager.close_db()
del self
"""
# Creates a new table
:param name: string #Table name
:param num_columns: int #Number of Columns: all columns are integer
:param key: int #Index of table key in columns
"""
def create_table(self, name, num_columns, key):
table = Table(name, num_columns, key, self.my_manager)
self.tables[name] = table
self.my_manager.make_table_folder(name)
return table
"""
# Deletes the specified table
"""
def drop_table(self, name):
pass
"""
# Returns table with the passed name
"""
def get_table(self, name):
print(self.tables[name].name)
return self.my_manager.import_table(self.tables[name])
pass
class Database():
# Initialized with a diskmanager class which handles reading and writing files from and to disk
def __init__(self):
self.tables = {}
self.my_manager = DiskManager()
self.my_manager.my_database = self
pass
### Opens a existing database by reading files ###
# :param path: string #Path to database directory
def open(self, path="db_files"):
self.my_manager.set_path(path)
self.my_manager.open_db()
pass
### Closes a database
def close(self):
self.my_manager.close_db()
del self
### Creates a new table ###
# :param name: string #Table name
# :param num_columns: int #Number of Columns: all columns are integer
# :param key: int #Index of table key in columns
def create_table(self, name, num_columns, key):
table = Table(name, num_columns, key, self.my_manager)
self.tables[name] = table
self.my_manager.make_table_folder(name)
return table
### Deletes the specified table ###
def drop_table(self, name):
pass
### Imports a existing table from disk ###
# :param name: #Table name
def get_table(self, name):
print(self.tables[name].name)
return self.my_manager.import_table(self.tables[name])