Question

我很难将format_column中的值传递给create_table方法：

class Sqlite_driver:

def __init__(self, db_name, table_name, columns):
    self.db_name = db_name
    self.table_name = table_name
    self.columns = columns


def format_column(self, columns):

    Sqlite_Allowed_Types = {
    "TEXT":"2500",
    "NUMERIC":"250",
    "INTEGER":"250",
    "REAL":"100",
    "BLOB":"100",}

    table_columns = []
    for k,v in columns.items():
        table_columns.append(k+" "+v+" "+"("+Sqlite_Allowed_Types [v]+")")
    return(table_columns)


def create_table(self,table_name, columns):
    '''
    creates the Sqlite3 table and columns.
    table_name expects a string
    columns expects a dictionary
    example :
    table_name = "Customer"
    columns ={"Name":"TEXT"} 


    '''

    format_column(columns)

    query = """CREATE TABLE """+ table_name+""" """+table_columns+""");"""

我认为这是由于实例化问题，但我不确定。

Answer 1

在调用create_table方法

后，您需要在format_column方法中实际指定返回值

table_columns = self.format_column(columns)

query = """CREATE TABLE """+ table_name+""" """+table_columns+""");"""

Python在两个方法之间传递值

1 个答案: