messagebox！显示一个消息窗口
目录
【2】show...(showwarning,showquestion等)?
【1】参数部分
__all__ = ["showinfo", "showwarning", "showerror",
"askquestion", "askokcancel", "askyesno",
"askyesnocancel", "askretrycancel"]
#
# constants
# icons
ERROR = "error"
INFO = "info"
QUESTION = "question"
WARNING = "warning"
# types
ABORTRETRYIGNORE = "abortretryignore"
OK = "ok"
OKCANCEL = "okcancel"
RETRYCANCEL = "retrycancel"
YESNO = "yesno"
YESNOCANCEL = "yesnocancel"
# replies
ABORT = "abort"
RETRY = "retry"
IGNORE = "ignore"
OK = "ok"
CANCEL = "cancel"
YES = "yes"
NO = "no"
包含了许多的样式：图标。
图标：error (错误)-[红色圆圈，里面有白色叉号]
,info(信息)-[蓝色圆圈，里面有白色i],
question(问题)-[蓝色圆圈，里面有白色?]和
warning(警告)-[黄色三角，里面有白色!].
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包含了许多的样式：键。
abortretryignore, ok, okcancel, retrycancel, yesno, 和?yesnocancel。
用法：abortretryignore :终止，重试，忽略
ok:确定
okcancel:确定，取消
retrycancel:重试，取消
yesno:是，否
yesnocancel:是，否，重试
例：
from tkinter import messagebox
a=messagebox._show("title","text","question","abortretryignore")
print(a)当我们点击【终止】键时，打印出了：abort.
-----------
终止:abort
重试:retry
取消:cancel
是:yes
否:no
确定:ok
忽略:ignore
-----------
【2】函数
【1】_show
tkinter.messagebox._show( title(标题),message(文字),_icon(上述的图标，如question),_type(上述的键，如ok) )
例:要做一个标题为"1",正文为"1",图标为错误警告，样式为确定的窗口：
import tkinter.messagebox
a=tkinter.messagebox._show("1","1",messagebox.ERROR,messagebox.OK)或者
import tkinter.messagebox
a=tkinter.messagebox._show("1","1","error","ok")【2】show...(showwarning,showquestion等)?
相当于
tkinter.messagebox._show(title,message,"error","ok")#这是showerror
tkinter.messagebox._show(title,message,"warning","ok")#这是showwarning
tkinter.messagebox._show(title,message,"info","ok")#这是showinfo
重点！没有showquestion,因为question表示疑问。只有一个确定？好像不太行。?
所以不用showquestion.
messagebox.py里的源码：
def showinfo(title=None, message=None, **options):
"Show an info message"
return _show(title, message, INFO, OK, **options)
def showwarning(title=None, message=None, **options):
"Show a warning message"
return _show(title, message, WARNING, OK, **options)
def showerror(title=None, message=None, **options):
"Show an error message"
return _show(title, message, ERROR, OK, **options)【3】ask...(askquestion等)
相当于
tkinter.messagebox._show(title,message,"question","yesno")#这是askquestion
tkinter.messagebox._show(title,message,"question","okcancel")#这是askokcancel
##以此类推
源码：
def askokcancel(title=None, message=None, **options):
"Ask if operation should proceed; return true if the answer is ok"
s = _show(title, message, QUESTION, OKCANCEL, **options)
return s == OK
def askyesno(title=None, message=None, **options):
"Ask a question; return true if the answer is yes"
s = _show(title, message, QUESTION, YESNO, **options)
return s == YES
def askyesnocancel(title=None, message=None, **options):
"Ask a question; return true if the answer is yes, None if cancelled."
s = _show(title, message, QUESTION, YESNOCANCEL, **options)
# s might be a Tcl index object, so convert it to a string
s = str(s)
if s == CANCEL:
return None
return s == YES
def askretrycancel(title=None, message=None, **options):
"Ask if operation should be retried; return true if the answer is yes"
s = _show(title, message, WARNING, RETRYCANCEL, **options)
return s == RETRY
?不过，它返回的是一个布尔值。
-*-自己看源码!-*-
[3]关于使用
直接调用就可以
from tkinter import messagebox
a=messagebox._show("title","text","question","abortretryignore")
print(a)这是源码里的调用示例部分：
if __name__ == "__main__":
print("info", showinfo("Spam", "Egg Information"))
print("warning", showwarning("Spam", "Egg Warning"))
print("error", showerror("Spam", "Egg Alert"))
print("question", askquestion("Spam", "Question?"))
print("proceed", askokcancel("Spam", "Proceed?"))
print("yes/no", askyesno("Spam", "Got it?"))
print("yes/no/cancel", askyesnocancel("Spam", "Want it?"))
print("try again", askretrycancel("Spam", "Try again?"))直接运行，然后输出。
效果的话可以自己copy一下，但注意要把函数改成messagebox.函数，例
showinfo改为messagebox.showinfo(import语句为:from tkinter import messagebox)
或改为tkinter.messagebox.showinfo(import语句为:import tkinter.messagebox)
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