Question

def index(request):
    conn = MySQLdb.connect(host="localhost", user="user", passwd="pwd", db="highchart_with_django")
    cursor = conn.cursor()
    cursor.execute("SELECT categories,tokyo,london,new_york,berlin FROM basic_line_chart")
    row = cursor.fetchone()
    while row is not None:
       print row
       row = cursor.fetchone()
    return render(request, "linechart.html")

它提供如下输出：

('Sep', Decimal('7.00'), Decimal('3.90'), Decimal('-0.20'), Decimal('-0.90'))
('Oct', Decimal('6.90'), Decimal('4.20'), Decimal('0.80'), Decimal('0.60'))

期待输出：

 ["Sep", "7.00", "3.90", "-0.20", "-0.90"],["Oct", "6.90", "4.20", "0.80", "0.60"]

我怎样才能做到这一点。请帮帮我。

Answer 1

根据此链接http://mysql-python.sourceforge.net/MySQLdb.html fetchone()会返回一个元组。

要将其转换为列表，只需将其转换为。

row = list(cursor.fetchone())

然后，您可以迭代列表，以便以您正在寻找的正确格式获取它们。

Answer 2

盲目地将所有内容转换为字符串（因为您没有具体说明）：

def index(request):
    conn = MySQLdb.connect(host="localhost", user="user", passwd="pwd", db="highchart_with_django")
    cursor = conn.cursor()
    cursor.execute("SELECT categories,tokyo,london,new_york,berlin FROM basic_line_chart")
    rows = [[str(field) for field in row] for row in cursor]
    for row in rows:
        print(row)
    return render(request, "linechart.html")

我不确定这会解决你的问题。您希望所有Decimal转换为字符串吗？某种浮点数可能对图表更有用。

Answer 3

您的问题并非100％明确，但如果您真的只是想获取字符串列表：

>>> for row in cursor.fetchall():
...     print [str(col) for col in row]
...
['Sep', '7.00', '3.90', '-0.20', '-0.90']
['Oct', '6.90', '4.20', '0.80', '0.60']

Answer 4

请尝试

row = cursor.dictfetchall() #which给dict

row = cursor.fetchall()＃给出一个列表。

输出： -

["Sep", "7.00", "3.90", "-0.20", "-0.90"],["Oct", "6.90", "4.20", "0.80", "0.60"]

Answer 5

试试这个： -

def index(request):
    conn = MySQLdb.connect(host="localhost", user="user", passwd="pwd", db="highchart_with_django")
    cursor = conn.cursor()
    cursor.execute("SELECT categories,tokyo,london,new_york,berlin FROM basic_line_chart")
    row = cursor.fetchone()
    while row is not None:
       print row
       row = list(cursor.fetchone())
    return render(request, "linechart.html")

如何使用python将数据显示为数组格式

5 个答案: