我正在用Tkinter编写一个GUI程序。除了键绑定之外，一切都运行顺利。当我测试它时我得到
“TypeError：setvar（）只取1个参数（给定2个）”
问题是我在这些实例中没有传递任何参数，所以我不明白问题所在。我陪审团通过在有问题的函数中添加额外的参数来操纵它。这使得绑定工作，但导致共享命令的按钮回退反向类型错误
“TypeError：setvar（）只需要2个参数（给定1个）”
代码如下。
有问题的约束符合行：18,27,186,187,212,230。
他们调用方法：manipulate.setvar（），manipulate.searching（），manipulate.stuff（）和manipulate.newent（）
#!/usr/bin/python2.7
from Tkinter import *
import ttk
import os
import json
global inventory
global where
where = False
class widgets:
def partnumber(self, parent, mode):
global PN
do = manipulate()
PN_in = ttk.Entry(parent, width=11, textvariable=PN)
if mode == 1:
PN_in.bind('<1>', do.setvar)
PN_in.grid(column=1, row=1, sticky=(W, E, S))
ttk.Label(parent, text='Part#').grid(column=1, row=2, sticky=(N, W))
def description(self, parent, mode):
global DESC
do = manipulate()
DESC_in = ttk.Entry(parent, width=20, textvariable=DESC)
if mode == 1:
DESC_in.bind('<1>', do.setvar)
DESC_in.grid(column=2, row=1, sticky=(E, S))
ttk.Label(parent, text='Description').grid(column=2, row=2, sticky=(N, W))
def quantity(self, parent):
global QTY
QTY_in = ttk.Entry(parent, width=3, textvariable=QTY)
QTY_in.grid(column=3, row=1, sticky=(S))
ttk.Label(parent, text='Qty.').grid(column=3, row=2, sticky=(N))
def cost(self, parent):
global COST
COST_in = ttk.Entry(parent, width=6, textvariable=COST)
COST_in.grid(column=4, row=1, sticky=(S))
ttk.Label(parent, text='Cost').grid(column=4, row=2, sticky=(N))
def quanchangebox(self, parent):
global MANQUAN
MANQUAN_in = Spinbox(parent, from_=1, to=10, textvariable=MANQUAN)
MANQUAN_in.pack()
class manipulate:
global name
name = str('BNEIDATA.txt')
def searching(self):
do = manipulate()
do.search(0)
def changevar(self, PN):
item = inventory[PN.get()]
DESC.set(item[0])
QTY.set(item[1])
COST.set(item[2])
def getresults(self):
global result, RESULT, inventory, PN, DESC, QTY, COST
hit = inventory[PN.get()]
do = manipulate()
do.changevar(PN)
bit = str(PN.get())
result.insert(0, bit)
bit = str(hit[0])
RESULT.insert(0, bit)
result.activate(1)
def search(self, mode):
global inventory, PN, DESC
do = manipulate()
do.load()
popup = boxes()
if inventory.get(PN.get(), False) != False:
do.getresults()
if mode == 1:
popup.howmany(mode)
if mode == 2:
popup.howmany(mode)
if inventory.get(PN.get(), False) == False:
ghostdict = {}
for key in iter(inventory):
entry = inventory[key]
ghostdict[entry[0].encode()] = key
if ghostdict.get(DESC.get(), False) != False:
PN.set(ghostdict[DESC.get()])
do.search(mode)
if ghostdict.get(DESC.get(), False) == False:
popup = boxes()
popup.additem()
def newent(self):
do = manipulate()
global addbox, PN, DESC, QTY, COST
temp = [DESC.get(), QTY.get(), COST.get()]
inventory[PN.get()] = temp
do.writ()
addbox.destroy()
def writ(self):
global inventory
os.remove(name)
with open(name, 'a') as datafile:
datafile.write(json.dumps(inventory))
reset = manipulate()
reset.setvar()
def create(self):
with open(name, 'a') as datafile:
bogusfirstentry = {'049007042':['Nylon Bushing', '75', '.47']}
datafile.write(json.dumps(bogusfirstentry))
def find(self, name, breed, path):
global where
if breed == 1:
for root, dirs, files in os.walk(path):
if name in files:
where = root
if breed == 2:
for root, dirs, files in os.walk(path):
if name in dirs:
where = os.path.join(root, name)
def load(self):
with open(name, 'r') as datafile:
temp = datafile.read()
global inventory
inventory = json.loads(temp)
ghostdict = {}
for key in iter(inventory):
entry=inventory[key]
ghostdict[key] = [entry[0].encode(), entry[1], entry[2]]
inventory = ghostdict
def setvar(self):
global PN, DESC, QTY, COST
PN.set('')
DESC.set('')
QTY.set(0)
COST.set(0)
def recieve(self):
do = manipulate()
do.search(1)
def use(self):
do = manipulate()
do.search(2)
def quan_up(self):
global MANQUAN, PN, inventory, quanbox
do = manipulate()
quan = inventory[PN.get()]
temp = [quan[0], (quan[1]+MANQUAN.get()), quan[2]]
inventory[PN.get()] = temp
do.writ()
quanbox.destroy()
do.setvar()
def quan_dn(self):
global MANQUAN, PN, inventory, quanbox
do = manipulate()
quan = inventory[PN.get()]
temp = [quan[0], (quan[1]-MANQUAN.get()), quan[2]]
inventory[PN.get()] = temp
do.writ()
quanbox.destroy()
do.setvar()
def stuff(self):
global result, RESULT, PN
do = manipulate()
PN.set(result.get(result.curselection()[0]))
do.changevar(PN)
class boxes:
def main(self):
do = manipulate()
root = Tk()
root.title('BNE Inventory Database')
root.bind('<Return>', do.searching)
root.bind('<BackSpace>', do.setvar)
mainframe = ttk.Frame(root, padding='3 3 3 3')
mainframe.grid(column=0, row=0, sticky=(N, W, E, S))
mainframe.columnconfigure(0, weight=1)
mainframe.rowconfigure(0, weight=1)
global result, RESULT, PN, DESC, QTY, COST
PN, DESC, QTY, COST = StringVar(), StringVar(), IntVar(), DoubleVar()
field = widgets()
field.partnumber(mainframe, 1)
field.description(mainframe, 1)
field.quantity(mainframe)
field.cost(mainframe)
ttk.Button(mainframe, text='Search', command=do.searching).grid(column=3, row=6, sticky=(W, E, N))
ttk.Button(mainframe, text='Recieved', command=do.recieve).grid(column=3, row=6, sticky=(W, E, S))
ttk.Button(mainframe, text='Adj Cost', command=root.destroy).grid(column=4, row=6, sticky=(W, E, N))
ttk.Button(mainframe, text='Used', command=do.use).grid(column=3, row=6, sticky=(W, E))
ttk.Button(mainframe, text='Clear Fields', command=do.setvar).grid(column=4, row=6, sticky=(W, E, S))
ttk.Button(mainframe, text='Reports', command=root.destroy).grid(column=4, row=6, sticky=(W, E))
RESULT = Listbox(mainframe, height=5)
RESULT.grid(column=2, row=6, sticky=(W, E, S))
result = Listbox(mainframe, height=5, width=11)
result.grid(column=1, row=6, sticky=(W, E, S,))
result.bind('<<ListboxSelect>>', do.stuff)
root.mainloop()
def additem(self):
global PN, DESC, QTY, COST, addbox
addbox = Toplevel()
addbox.title('Add New Item')
addboxframe = ttk.Frame(addbox, padding='3 3 3 3')
addboxframe.grid(column=0, row=0, sticky=(N, W, E, S))
addboxframe.columnconfigure(0, weight=1)
addboxframe.rowconfigure(0, weight=1)
field = widgets()
field.partnumber(addboxframe, 0)
field.description(addboxframe, 0)
field.quantity(addboxframe)
field.cost(addboxframe)
do = manipulate()
addbox.bind('<Return>', do.newent)
ttk.Button(addboxframe, text='Add New Item', command=do.newent).grid(columnspan=5, row=3, sticky=(W, E))
def howmany(self, mode):
global MANQUAN, quanbox
field = widgets()
do = manipulate()
MANQUAN = IntVar()
quanbox = Toplevel()
quanboxframe = ttk.Frame(quanbox, padding='3 3 3 3')
quanboxframe.grid(column=0, row=0, sticky=(N, W, E, S))
quanboxframe.columnconfigure(0, weight=1)
quanboxframe.rowconfigure(0, weight=1)
field.quanchangebox(quanboxframe)
if mode == 1:
quanbox.title('Item(s) Recieved')
ttk.Button(quanboxframe, text=' + Parts', command=do.quan_up).pack()
if mode == 2:
quanbox.title('Item(s) Used')
ttk.Button(quanboxframe, text=' - Parts', command=do.quan_dn).pack()
if __name__ == '__main__':
check = manipulate()
gui = boxes()
check.find('BNEIDATA.txt', 1, '/')
if where == False:
check.create()
check.load()
if where != False:
check.load()
gui.main()
答案 0 :(得分：1)
将事件绑定到面向对象的处理程序时：
PN_in.bind('<1>', do.setvar)
它将使用两个参数(self, event)
但是你只定义了一个人拿一个：
def setvar(self):
如果您不需要event参数中包含的信息，您可以将其定义为具有默认值但不使用它的参数：
def setvar(self, event=None):
通过将值默认为None，您仍然可以将其称为代码中没有参数的方法（隐含self参数）：
do.setvar()
另一种方法是将它分成两个方法，一个是两个参数，用于绑定，它只是调用其他方面使用的一个参数版本。
答案 1 :(得分：0)
代码中发生的事情是您将事件绑定到PN_in，但是您忘记了将事件对象传递给事件处理程序。
def setvar(self):
global PN, DESC, QTY, COST
PN.set('')
DESC.set('')
QTY.set(0)
COST.set(0)
问题在于setvar方法没有采用事件参数，因此没有错误。要解决此问题，只需将event参数添加到方法声明中。
def setvar(self, event):
global PN, DESC, QTY, COST
PN.set('')
DESC.set('')
QTY.set(0)
COST.set(0)