python - 如何从多个字符串中删除某些字符？

Question

我正在尝试从数据库中获取国家/地区名称并将其粘贴到 QComboBox。一切工作正常，除了来自数据库表的元组，如 ('Afghanistan',) 、 ('Angola',) ... 问题是如何从元组中删除无用的字符。代码是:

countries = []
try:
    conn = MySQLdb.connect(host='localhost', user='root', passwd='*****', db='world')
    cursor = conn.cursor()
    try:
        cursor.execute("SELECT Name from country")
        while True:
            rows = cursor.fetchone()
            if rows == None:
                break
            else:
                countries.append(rows)
    except:
        print('Error CURSOR')
    cursor.close()
    conn.close()
except:
    pass
for i in countries:
    self.country_cbox.addItem(str(i)) # Converting to string
print(countries)
self.add_worker.show()
self.add_worker.exec_()

Answer 1

您可以使用列名或元组索引来删除值:

countries.append(rows.Name)  # column name
# or use 
rows[0]  # column index