【发布时间】：2016-02-08 01:49:44
【问题描述】：
其他几个人也问过类似的问题，但我认为它们不一定适用于我的情况。我正在编写一个程序，该程序最终将接受用户输入，检查以确保它们正确，然后将其全部保存到文件中。目前，我将所有用户输入传递到 tkinter 中的文本框，以便我可以保存该文本框中的任何内容。我正在使用 for 循环遍历我拥有的 7 个用户输入字段，然后将它们插入到文本框中。
def submit(self):
""" submits user data up to input data section of GUI and checks USL vs LSL"""
e6 = IntVar(self.e6)
e7 = IntVar(self.e7)
if e6 > e7:
message = "Limits are good"
else:
message = "USL can't be less than LSL, please re-enter USL and LSL"
self.checklimits.delete(0.0, END)
self.checklimits.insert(0.0, message)
x = 1
for x in range (1, 8):
xname = "self.e" + str(x)
entry = xname.get()
if entry:
self.checktext.insert(END, entry + "\n")
x = x+1
我想在 for 循环中获取 x 值并最终得到类似“self.e#.get()”的内容，因为这就是我定义用户条目的方式，请参见下面的示例：
def create_widgets(self):
"""create widgets for user inputted data"""
# creates a text widget next to the entries that displays what the user has input
Label(self, text = "Do these values you entered seem correct?").grid(row = 0, column = 4, sticky = W, padx = 5, pady = 5)
self.checktext = Text(self, width =15, height = 42, wrap = WORD)
self.checktext.grid(row = 1, rowspan = 10, column = 4, sticky = W, padx =5, pady =5)
# get name
Label(self, text = "First Name:").grid(row = 0, column = 0, sticky = W, padx=5, pady=5)
self.e1 = Entry(self)
self.e1.grid(row = 0, column = 1)
Label(self, text = "Last Name:").grid(row = 1, column = 0, sticky = W, padx=5, pady=5)
self.e2 = Entry(self)
self.e2.grid(row = 1, column = 1)
不过现在，python 并没有将该条目识别为一个条目，而是对我说“'str' object has no attribute 'get'”
所以，一是为什么我不能“获取”一个字符串值，二是如何让 python 识别我之前定义的条目？这是我的整个上下文代码
from Tkinter import *
class Application(Frame):
""" A SPC program that takes user input and saves the file """
def __init__(self,master):
""" initializes the frame """
Frame.__init__(self,master)
self.grid()
self.create_widgets()
def create_widgets(self):
"""create widgets for user inputted data"""
# creates a text widget next to the entries that displays what the user has input
Label(self, text = "Do these values you entered seem correct?").grid(row = 0, column = 4, sticky = W, padx = 5, pady = 5)
self.checktext = Text(self, width =15, height = 42, wrap = WORD)
self.checktext.grid(row = 1, rowspan = 10, column = 4, sticky = W, padx =5, pady =5)
# get name
Label(self, text = "First Name:").grid(row = 0, column = 0, sticky = W, padx=5, pady=5)
self.e1 = Entry(self)
self.e1.grid(row = 0, column = 1)
Label(self, text = "Last Name:").grid(row = 1, column = 0, sticky = W, padx=5, pady=5)
self.e2 = Entry(self)
self.e2.grid(row = 1, column = 1)
# get work order
Label(self, text = "Work Order Number:").grid(row = 2, column = 0, sticky = W, padx=5, pady=5)
self.e3 = Entry(self)
self.e3.grid(row = 2, column = 1)
# get todays date
Label(self, text = "Todays Date:").grid(row = 3, column = 0, sticky = W, padx=5, pady=5)
self.e4 = Entry(self)
self.e4.grid(row = 3, column = 1)
# get bubble number
Label(self, text = "Bubble Number:").grid(row = 4, column = 0, sticky = W, padx=5, pady=5)
self.e5 = Entry(self)
self.e5.grid(row = 4, column = 1)
# get USL and LSL
Label(self, text = "USL:").grid(row = 5, column = 0, sticky = W, padx=5, pady=5)
self.e6 = Entry(self)
self.e6.grid(row = 5, column = 1)
Label(self, text = "LSL:").grid(row = 6, column = 0, sticky = W, padx=5, pady=5)
self.e7 = Entry(self)
self.e7.grid(row = 6, column = 1)
"""# button to check USL is higher than LSL
self.button7 = Button(self)
self.button7["text"] = "Check Limits"
self.button7["command"] = self.check_limits
self.button7.grid(row = 6, column = 2, sticky = W, padx=5, pady=5)"""
# button to submit user entered values up to the input data values portion of the gui
self.button6 = Button(self)
self.button6["text"] = "Submit"
self.button6["command"] = self.submit
self.button6.grid(row = 5, column = 2, sticky = W, padx=5, pady=5)
# creates a spot to dictate whether USL and LSL are correct
self.checklimits = Text(self, width = 20, height = 2, wrap = WORD)
self.checklimits.grid(row = 6, column = 3, sticky = W, padx = 5)
""" #adds a scroll bar to the data input text box
scrollbar = Scrollbar(self)
scrollbar.pack(side=RIGHT, fill=Y) """
# get User Input Data values
Label(self, text = "Enter Results:").grid(row = 7, column = 0, sticky = W, padx=5, pady=5)
self.e8 = Text(self, width = 15, height = 30)
self.e8.grid(row = 7, column = 1)
""" def check_limits(self):
checks to see if the USL is greater than the LSL
e6 = IntVar(self.e6)
e7 = IntVar(self.e7)
if e6 > e7:
message = "Limits are good"
else:
message = "USL can't be less than LSL, please re-enter USL and LSL"
self.checklimits.delete(0.0, END)
self.checklimits.insert(0.0, message)"""
def submit(self):
""" submits user data up to input data section of GUI and checks USL vs LSL"""
e6 = IntVar(self.e6)
e7 = IntVar(self.e7)
if e6 > e7:
message = "Limits are good"
else:
message = "USL can't be less than LSL, please re-enter USL and LSL"
self.checklimits.delete(0.0, END)
self.checklimits.insert(0.0, message)
x = 1
for x in range (1, 8):
xname = "self.e" + str(x)
entry = xname.get()
if entry:
self.checktext.insert(END, entry + "\n")
x = x+1
root = Tk()
root.title("SPC Input Program")
root.geometry("700x750")
app = Application(root)
root.mainloop()
【问题讨论】：
-
不要使用这样的名称创建变量。请改用列表或字典。
-
使用
eval(xname)而不是xname.get()尽管凯文的建议更好
标签： python python-2.7 tkinter tk