Question

我是编码的新手，所以请原谅我任何简单的疏忽我正在编写一个程序来查询我的本地SQL数据库并返回有关数据的基本统计信息。我正在尝试构建一个简单的tkinter GUI，它将控制两个变量因子并在文本框中打印结果我目前只是从输入框中获取变量。

我使用的是Python 3.6，我的代码如下。

非常感谢任何帮助。

from tkinter import *
from tkinter.ttk import *
import pandas as pd
import sqlalchemy as sc

engine = sc.create_engine("mssql+pyodbc://DC2:password@SQLconn")


class SimLvGUI(Frame):
    def __init__(self, parent):
        Frame.__init__(self, parent)

        self.parent = parent
        self.init_ui()

    def init_ui(self):
        self.parent.title("SimLv")
        self.pack(fill=BOTH, expand=1)

        lbl = Label(self, text="Enter FTR Source Sink")
        lbl.grid(row=0, column=0, sticky=N + W, pady=4, padx=5)

        entry1 = Entry(self)
        entry1.grid(row=1, column=0, columnspan=1, padx=5, sticky=N + W)

        lb2 = Label(self, text="Enter FTR Month as Number")
        lb2.grid(row=2, column=0, sticky=N + W, pady=4, padx=5)

        entry2 = Entry(self)
        entry2.grid(row=3, column=0, columnspan=1, padx=5, sticky=N + W)

        run_button = Button(self, text="Run")
        run_button.grid(row=4, column=0, pady=4, padx=5, sticky=N + W)
        run_button.config(command=self.on_button)

        lb3 = Label(self, text="Historic spot FTR stats")
        lb3.grid(row=5, column=0, padx=5, sticky=N + W)

        results1 = Text(self, width=30)
        results1.grid(row=6, column=0, rowspan=10, padx=5, sticky=W + N)

        lb4 = Label(self, text="Historic FTR clearing stats")
        lb4.grid(row=5, column=1, padx=5, sticky=N + W)

        results2 = Text(self, width=30)
        results2.grid(row=6, column=1, rowspan=10, padx=5, sticky=W + N)

        lb5 = Label(self, text="Last FTR clearing price")
        lb5.grid(row=5, column=2, padx=5, sticky=N + W)

        results3 = Text(self, width=30, height=10)
        results3.grid(row=6, column=2, rowspan=5, padx=5, sticky=W + N)

        lb6 = Label(self, text="High volume FTR clearing price")
        lb6.grid(row=11, column=2, padx=5, sticky=N + W)

        results3 = Text(self, width=30, height=10)
        results3.grid(row=12, column=2, rowspan=5, padx=5, sticky=W + N)

    def on_button(self):
        ftr_source_sink = self.entry1.get()
        ftr_month = self.entry2.get()

    def run_simlv(self):

    sql1 = ("SELECT Avg({0}) as {0} "
            "FROM dbo.FTR_matrix "
            "WHERE month(Trading_date) = {1} "
            "GROUP BY month(Trading_date), year(Trading_date) ORDER BY  
            year(Trading_date), month(Trading_date) "
            .format(ftr_source_sink, ftr_month))
    # Import FTR clearing data from SQL server.
    sql2 = ("SELECT Price "
            "FROM dbo.FTR_Reg "
            "WHERE FTR = '{0}' and Mth = {1} and HedgeType = 'OPT' and MW>0 and 
            Price>0 "
            "ORDER BY Mth, Yr ".format(ftr_source_sink, ftr_month))
    # Return most recent FTR clearing price.
    sql3 = ("SELECT DateAcquired, Mth, Yr, FTR, MW, Price "
            "FROM (SELECT m.*, row_number() over (partition by FTR order by 
            DateAcquired desc) as rn  "
            "FROM dbo.FTR_Reg m "
            "WHERE FTR = '{0}' and Mth = {1} and HedgeType = 'OPT' ) m2 "
            "WHERE m2.rn = 1 ".format(ftr_source_sink, ftr_month))
    # Return the highest volume FTR purchase
    sql4 = ("SELECT DateAcquired, Mth, Yr, FTR, MW, Price "
            "FROM (SELECT m.*, row_number() over (partition by FTR order by MW 
            desc) as rn  "
            "FROM dbo.FTR_Reg m "
            "WHERE FTR = '{0}' and Mth = {1} and HedgeType = 'OPT' ) m2 "
            "WHERE m2.rn `enter code here`= 1 ".format(ftr_source_sink, enter 
            code here ftr_month))

    # Output historic spot statistics
    print('Spot Price Statistics')
    ftr_month_value = pd.read_sql_query(sql1, engine)
    print(ftr_month_value.describe())

    # Output historic clearing statistics
    print('Clearing Price Statistics')
    ftr_clearing = pd.read_sql_query(sql2, engine)
    print(ftr_clearing.describe())

    # Output last clearing price
    print('Last Clearing Price')
    ftr_lastprice = pd.read_sql_query(sql3, engine)
    print(ftr_lastprice)

    # Output highest volume cleared
    print('Clearing Price at highest cleared volume')
    ftr_high_volume = pd.read_sql_query(sql4, engine)
    print(ftr_high_volume)


def main():
root = Tk()
root.geometry("900x600+200+50")
app = SimLvGUI(root)
root.mainloop()


if __name__ == '__main__':
    main()

Answer 1

您的on_button没有任何实际意义，因为ftr_source_sink和ftr_month在您的函数定义中存在且死。尝试将它们保存为属性：

def on_button(self):
    self.ftr_source_sink = self.entry1.get()
    self.ftr_month = self.entry2.get()

以便您以后可以在类定义中的任何位置访问它们。

作为旁注，如果您决定采用这种方法，通常最好在__init__内初始化这些属性：

def __init__(self, parent):
    # your code
    self.ftr_source_sink = None
    self.ftr_month = None

从tkinter GUI返回变量以执行代码，然后将结果打印到GUI

1 个答案: