我遇到了一个非常奇怪的错误。
在我的python脚本的许多函数中，我有这段代码：
url=['http://API_URL/query/query.aspx?name=', name, '&md=user']
url=''.join(url)
file = open("QueryESO.xml", "w")
filehandle = urllib.urlopen(url)
for lines in filehandle.readlines():
file.write(lines)
file.close()
当我在IDLE中运行时，一切都很顺利。
如果我使用Python（命令行）运行它，则会出现以下错误：
[Errno 22] invalid mode('w') or filename: 'QueryESO.xml'
这里开始变得奇怪： 奇怪之处1：我的脚本中不同函数中都有完全相同的代码，但错误只发生在其中一个函数中。
奇怪之处2：如果我将代码更改为以下内容，则可以正常工作：
url=['http://API_URL/query/query.aspx?name=', name, '&md=user']
print url
url=''.join(url)
file = open("QueryESO.xml", "w")
filehandle = urllib.urlopen(url)
for lines in filehandle.readlines():
file.write(lines)
file.close()
我还尝试将打印url移动到加入列表之后，但没有成功，我也尝试使用print ""，但仍然出现了前面提到的错误。
所以我想我已经找到了一个解决方案...但有人能解释一下这种行为吗？我是做错了什么吗？（你需要我发帖整个脚本让你可以研究它吗？）
编辑：这是整个代码：
import urllib
from Tkinter import *
import tkFont
master = Tk()
QUERY_ESO = "QueryESO.xml"
def QueryXML(xml, attribute):
x = ["<", attribute, ">"]
x=''.join(x)
z = xml.split(x, 1)
x = ["</", attribute, ">"]
x=''.join(x)
z=z[1]
z=z.split(x, 1)
return z[0]
def AddFriend():
nfentry = nfe2
name=nfentry.get()
url=['http://agecommunity.com/query/query.aspx?name=', name, '&md=user']
url=''.join(url)
file = open("QueryESO.xml", "w")
filehandle = urllib.urlopen(url)
for lines in filehandle.readlines():
file.write(lines)
file.close()
f = open(QUERY_ESO, "r")
xml = f.readlines()
f.close()
xml=''.join(xml)
f = open("Friends.txt", "r")
filestring = f.read()
f.close()
fs = filestring.split('\n')
if name in fs:
print "Friend Already Added"
elif xml == "<?xml version='1.0' encoding='utf-8'?><error>Failed to find user</error>":
print "User does not exist"
else:
fs.append(name)
fs = '\n'.join(fs)
f = open("Friends.txt", "w")
f.write(fs)
f.close()
nfe2.set("")
nfentry = nfe2
def DeleteFriend():
ofentry = ofe2
name=ofentry.get()
f = open("Friends.txt", "r")
filestring = f.read()
f.close()
fs = filestring.split('\n')
if name in fs:
fs.remove(name)
fs = '\n'.join(fs)
f = open("Friends.txt", "w")
f.write(fs)
ofe2.set("")
ofentry = ofe2
def IsOnline(name):
url=['http://API_URL/query/query.aspx?name=', name, '&md=user']
print url
url=''.join(url)
file = open("QueryESO.xml", "w")
filehandle = urllib.urlopen(url)
for lines in filehandle.readlines():
file.write(lines)
file.close()
f = open(QUERY_ESO, "r")
xml = f.readlines()
f.close()
xml=''.join(xml)
if xml == "<?xml version='1.0' encoding='utf-8'?><error>Failed to find user</error>":
print "User does not exist"
else:
datetime = QueryXML(xml, "LastUpdated")
datetime = datetime.split('T', 1)
time = datetime[1].split('Z', 1)
date = datetime[0]
print "User", name, "is", QueryXML(xml, "presence"), "as of", date, "at", time[0]
return QueryXML(xml, "presence")
def FriendCheck():
f = open("Friends.txt", "r")
filestring = f.read()
f.close()
fs = filestring.split('\n')
Laonline = Label(lowerframe, text="")
Laonline.grid(column=0, row=0)
Laonline.grid_forget()
x=0
while x <= (len(fs)-1):
if IsOnline(fs[x]) == "online":
Laonline = Label(lowerframe, text=fs[x])
Laonline.grid(column=0, row=x)
x=x+1
def RunTwo(Function1, Function2):
Function1()
Function2()
def DeleteAllFriends():
fs = "<?xml version='1.0' encoding='utf-8'?>\n<friends>\n</friends>"
f = open("Friends.txt", "w")
f.write(fs)
f.close()
FriendCheck()
def DAFPop():
DAFpopup = Toplevel()
DAFframe = Frame(DAFpopup)
DAFframe.grid(columnspan=4, column=0, row=0)
F1 = DeleteAllFriends
F2 = DAFpopup.destroy
Q1 = lambda: RunTwo(F1, F2)
DAFL1 = Label(DAFframe, text="This delete all of your friends. Are you sure you wish to continue?")
DAFL1.grid()
DAFOK = Button(DAFpopup, width=10, text="Yes", command=Q1)
DAFOK.grid(column=1, row=1)
DAFNO = Button(DAFpopup, width=10, text="No", command=DAFpopup.destroy)
DAFNO.grid(column=2, row=1)
frame = Frame(master, bd=5)
frame.grid()
friendlist = Frame(frame, bd=5, width=150, height=400)
friendlist.grid(column=0, row=0, rowspan=15)
lon = Frame(friendlist, bd=2, width=150, height=10)
lon.grid()
Lonline = Label(lon, text="Friends Online")
Lonline.grid(column=0, row=1)
underlined = tkFont.Font(Lonline, Lonline.cget("font"))
underlined.configure(underline=True)
Lonline.configure(font=underlined)
lowerframe = Frame(friendlist, bd=2, width=150, height=390)
lowerframe.grid()
lowerframe.grid_propagate(0)
newfriendframe = Frame(frame, bd=2)
newfriendframe.grid(column=1, row=0)
nfe2 = StringVar()
nfentry = Entry(newfriendframe, width=12, textvariable=nfe2)
nfentry.grid()
nfe2.set("")
nfentry = nfe2.get()
newfriend = Button(newfriendframe, text="Add Friend", width=10, command=AddFriend)
newfriend.grid(column=0, row=1)
oldfriendframe = Frame(frame, bd=2)
oldfriendframe.grid(column=1, row=1)
ofe2 = StringVar()
ofentry = Entry(oldfriendframe, width=12,textvariable=ofe2)
ofentry.grid()
ofe2.set("")
ofentry = ofe2.get()
oldfriend = Button(oldfriendframe, text="Delete Friend", width=10, command=DeleteFriend)
oldfriend.grid(column=0, row=1)
rof = Button(frame, text="Reset List", width=10, command=DAFPop)
rof.grid(column=1, row=2)
update = Button(frame, text="Refresh", width=10, command=FriendCheck)
update.grid(column=1, row=3)
close = Button(frame, text="Exit", width=10, command=master.destroy)
close.grid(column=1, row=4)
master.mainloop()
有一个函数不起作用，那就是IsOnline()，尽管我已经在发布的代码中添加了print url，这似乎使其在90%的情况下可以正常运行，而没有它则100%出现错误。
它还有一个依赖文本文件Friends.txt：
friend1
friend2
friend3
对我来说，即使没有 QueryESO.xml 文件（当然如果没有错误的话），它似乎也可以很好地创建 QueryESO.xml。 如果您的情况不是这样，请使用名为 QueryESO.xml 的空文件，因为它会从网页获取其内容。
“刷新”按钮中存在错误。
file是 Python 内置文件类型的名称；覆盖它被视为不良习惯。 - KatrielDeleteFriend()函数中的if name in fs部分缺少一个f.close()。 - Matt Gibson