我当前正在使用easygui运行脚本以接收用户输入。在命令行中运行的旧脚本仅会打印用户在命令行中需要知道的所有内容，但是我将其更改为在需要输入时在新的easygui框中输出通知。
我想要做的就是取得进展，正在运行的功能内部的每个动作，在完成时打印到文本框中。在命令行中，我只能使用print "text"，但无法在easygui中实时进行。目前，我正在添加一个列表，因此我有一个文本框，该文本框会在所有操作完成后显示函数的结果，但是我希望大型的文本框窗口弹出并在注释过程完成时将行打印出来。这可行吗？
这是我添加列表的方式：
result_list = []
record_str = "\n Polling has completed for 502."
result_list.append(record_str)
eg.textbox("Polling Status", "Daily polling completion status:", result_list)
最佳答案
我认为没有任何简单的方法可以使EasyGUI的textbox函数执行您想要的修改模块之外的事情。由于它是一个函数而不是一个类，因此您甚至无法从中派生子类来轻松重用其代码。
但是，创建单独的Tkinter窗口是完全可行的，该窗口使用在comp.lang.python新闻组中的某个线程中一次发现的某些代码的增强版本，仅显示发送给它的文本行。
原始代码旨在捕获和显示通常不具有stderr输出句柄的GUI应用程序中的stderr输出，因此该模块被命名为errorwindow。但是，我对其进行了修改，以便能够在我开发的一个基于stderr的应用程序中将stdout和easygui都重定向到此类窗口，但是我从来没有回避重命名它或更新其中的注释以提及stdout重定向。 ;¬)
无论如何，该模块通过定义和创建名为OutputPipe的类似文件的类的两个实例进行工作，并将其分配给通常为import的sys.stdout和sys.stderr I / O流文件对象。 >在Python None GUI应用程序中（在Windows上）。当输出首先发送到其中一个时，同一个模块将作为单独的Python进程启动，其.pyw，stdin和stdout I / O句柄通过原始进程传递。
发生了很多事情，但是如果没有其他事情，请对其进行一些研究可能会为您提供一些有关如何使stderr的easygui进行所需操作的想法。希望这可以帮助。
注意：发布的代码是针对Python 2.x的，如果有人感兴趣的话，还有一个修改后的版本可以在my answer中的Python 2和3中使用，以解决另一个问题。
文件textbox：
# references:
# https://groups.google.com/d/msg/comp.lang.python/HWPhLhXKUos/TpFeWxEE9nsJ
# https://groups.google.com/d/msg/comp.lang.python/HWPhLhXKUos/eEHYAl4dH9YJ
#
# Here's a module to show stderr output from console-less Python
# apps, and stay out of the way otherwise. I plan to make a ASPN
# recipe of it, but I thought I'd run it by this group first.
#
# To use it, import the module. That's it. Upon import it will
# assign sys.stderr.
#
# In the normal case, your code is perfect so nothing ever gets
# written to stderr, and the module won't do much of anything.
# Upon the first write to stderr, if any, the module will launch a
# new process, and that process will show the stderr output in a
# window. The window will live until dismissed; I hate, hate, hate
# those vanishing-consoles-with-critical-information.
#
# The code shows some arguably-cool tricks. To fit everthing in
# one file, the module runs the Python interpreter on itself; it
# uses the "if __name__ == '__main__'" idiom to behave radically
# differently upon import versus direct execution. It uses TkInter
# for the window, but that's in a new process; it does not import
# TkInter into your application.
#
# To try it out, save it to a file -- I call it "errorwindow.py" -
# - and import it into some subsequently-incorrect code. For
# example:
#
# import errorwindow
#
# a = 3 + 1 + nonesuchdefined
#
# should cause a window to appear, showing the traceback of a
# Python NameError.
#
# --
# --Bryan
# ----------------------------------------------------------------
#
# martineau - Modified to use subprocess.Popen instead of the os.popen
# which has been deprecated since Py 2.6. Changed so it
# redirects both stdout and stderr. Added numerous
# comments, and also inserted double quotes around paths
# in case they have embedded space characters in them, as
# they did on my Windows system.
"""
Import this module into graphical Python apps to provide a
sys.stderr. No functions to call, just import it. It uses
only facilities in the Python standard distribution.
If nothing is ever written to stderr, then the module just
sits there and stays out of your face. Upon write to stderr,
it launches a new process, piping it error stream. The new
process throws up a window showing the error messages.
"""
import subprocess
import sys
import thread
import os
if __name__ == '__main__': # when spawned as separate process
# create window in which to display output
# then copy stdin to the window until EOF
# will happen when output is sent to each OutputPipe created
from Tkinter import BOTH, END, Frame, Text, TOP, YES
import tkFont
import Queue
queue = Queue.Queue(100)
def read_stdin(app, bufsize=4096):
fd = sys.stdin.fileno() # gets file descriptor
read = os.read
put = queue.put
while True:
put(read(fd, bufsize))
class Application(Frame):
def __init__(self, master=None, font_size=8, text_color='#0000AA', rows=25, cols=100):
Frame.__init__(self, master)
# argv[0]: name of this script (not used)
# argv[1]: name of script that imported this module
# argv[2]: name of redirected stream (optional)
if len(sys.argv) < 3:
title = "Output Stream from %s" % (sys.argv[1],)
else:
title = "Output Stream '%s' from %s" % (sys.argv[2], sys.argv[1])
self.master.title(title)
self.pack(fill=BOTH, expand=YES)
font = tkFont.Font(family='Courier', size=font_size)
width = font.measure(' '*(cols+1))
height = font.metrics('linespace')*(rows+1)
self.configure(width=width, height=height)
self.pack_propagate(0) # force frame to be configured size
self.logwidget = Text(self, font=font)
self.logwidget.pack(side=TOP, fill=BOTH, expand=YES)
# Disallow key entry, but allow copy with <Control-c>
self.logwidget.bind('<Key>', lambda x: 'break')
self.logwidget.bind('<Control-c>', lambda x: None)
self.logwidget.configure(foreground=text_color)
#self.logwidget.insert(END, '==== Start of Output Stream ====\n\n')
#self.logwidget.see(END)
self.after(200, self.start_thread, ())
def start_thread(self, _):
thread.start_new_thread(read_stdin, (self,))
self.after(200, self.check_q, ())
def check_q(self, _):
log = self.logwidget
log_insert = log.insert
log_see = log.see
queue_get_nowait = queue.get_nowait
go = True
while go:
try:
data = queue_get_nowait()
if not data:
data = '[EOF]'
go = False
log_insert(END, data)
log_see(END)
except Queue.Empty:
self.after(200, self.check_q, ())
go = False
app = Application()
app.mainloop()
else: # when module is first imported
import traceback
class OutputPipe(object):
def __init__(self, name=''):
self.lock = thread.allocate_lock()
self.name = name
def __getattr__(self, attr):
if attr == 'pipe': # pipe attribute hasn't been created yet
# launch this module as a separate process to display any output
# it receives.
# Note: It's important to put double quotes around everything in case
# they have embedded space characters.
command = '"%s" "%s" "%s" "%s"' % (sys.executable, # command
__file__, # argv[0]
os.path.basename(sys.argv[0]), # argv[1]
self.name) # argv[2]
# sample command and arg values on receiving end:
# E:\Program Files\Python\python[w].exe # command
# H:\PythonLib\TestScripts\PyRemindWrk\errorwindow.py # argv[0]
# errorwindow.py # argv[1]
# stderr # argv[2]
# execute this script as __main__ with a stdin PIPE for sending output to it
try:
# had to make stdout and stderr PIPEs too, to make it work with pythonw.exe
self.pipe = subprocess.Popen(command, bufsize=0,
stdin=subprocess.PIPE,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE).stdin
except Exception:
# output exception info to a file since this module isn't working
exc_type, exc_value, exc_traceback = sys.exc_info()
msg = ('%r exception in %s\n' %
(exc_type.__name__, os.path.basename(__file__)))
with open('exc_info.txt', 'wt') as info:
info.write('msg:' + msg)
traceback.print_exc(file=info)
sys.exit('fatal error occurred spawning output process')
return super(OutputPipe, self).__getattribute__(attr)
def write(self, data):
with self.lock:
self.pipe.write(data) # 1st reference to pipe attr will cause it to be created
# redirect standard output streams in the process importing the module
sys.stderr = OutputPipe('stderr')
sys.stdout = OutputPipe('stdout')
关于python - 在函数运行时写入easygui文本框？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/18089506/