Hi and thanks for reading this. I know what the problem is but I can't figure out how to fix it.
So the problem goes like this (I think), python is trying to run connect() before the user inputs the host name(hostname) therefore python is trying to connect to a blank host('') which in turn causes a [WinError 10061] to happen. I have tried buffering connect() with another function(connect_buffer()), the error kept on happening, even when I added a if statement that set hostname to 'localhost' if hostname was blank(''), but that didn't work either and turned up the same error.
So my Question is how do I fix this?
Here is the error:
Traceback (most recent call last):
File "H:\server\New folder\Tk_cleint.py", line 89, in <module>
setup_confirm_button = tk.Button(window,text = 'Connect', command = setup())
File "H:\server\New folder\Tk_cleint.py", line 18, in setup
create_sock(host, int(port))
File "H:\server\New folder\Tk_cleint.py", line 36, in create_sock
connect(cleintsocket, nhost, nport)
File "H:\server\New folder\Tk_cleint.py", line 27, in connect
self.connect((hostname, connectingport))
ConnectionRefusedError: [WinError 10061] No connection could be made because the target machine actively refused it
And here is my code
#---Import statments---#
import socket, os, multiprocessing
import tkinter as tk
#---global variables---#
setup = ''
cleintsocket = ''
#---Defs---#
def setup():
global host, port, user
host = setup_host_box.get()
port = setup_port_box.get()
user = setup_user_box.get()
def connect_buffer(self, hostname, connectingport):
connect(self, hostname, connectingport)
def connect(self, hostname, connectingport):
if hostname == '':
hostname = 'localhost'
self.connect((hostname, int(connectingport)))
print('connected')
multiprocessing.Process(target = resv()).start()
def create_sock(nhost, nport):
global cleintsocket
cleintsocket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
connect(cleintsocket, nhost, nport)
def send(username, cleintsock):
'''to send a message'''
usrmsg = (username + ' - ' + chat_msg_box.get()).encode()
cleintsock.send(usrmsg)
def resv(sock):
'''resive subscript, run through mutiprosses module'''
while True:
rmsg = sock.recv(1024).decode()
chat_msg_display_text.insert('end.0.', rmsg)
def chat():
'''loads chat page'''
setup_host_text.pack_forget()
setup_host_box.pack_forget()
setup_port_text.pack_forget()
setup_port_box.pack_forget()
setup_user_text.pack_forget()
setup_user_box.pack_forget()
setup_confirm_button.pack_forget()
chat_msg_display_text.pack()
chat_msg_box.pack()
chat_msg_send_button.pack()
def start():
'''starts the setup page'''
setup_host_text.pack()
setup_host_box.pack()
setup_port_text.pack()
setup_port_box.pack()
setup_user_text.pack()
setup_user_box.pack()
setup_confirm_button.pack()
def send_button_callback():
'''add a buffer to allow time for 'cleintsocket' to be defined in "create_sock()"'''
send(user, cleintsocket)
#---TK Setup---#
#--window setup--#
window = tk.Tk()
window.title('Chat')
window.geometry('600x600')
window.configure(background='#ffffff')
#--connection setup page--#
setup_host_text = tk.Label(window, text = 'Host')
setup_host_box = tk.Entry(window, bg = '#ffffff')
setup_port_text = tk.Label(window, text = 'Port')
setup_port_box = tk.Entry(window, bg = '#ffffff')
setup_user_text = tk.Label(window, text = 'Username')
setup_user_box = tk.Entry(window, bg = '#ffffff')
setup_confirm_button = tk.Button(window,text = 'Connect', command = setup())
#--chat page--#
chat_msg_box = tk.Entry(window, bg='#ffffff')
chat_msg_send_button = tk.Button(window, text = 'send', command = send_button_callback)
chat_msg_display_text = tk.Text(window, width=600, height=500, wrap = 'word')
#--------------#
start()
and here are some links to questions that didn't help:
WinError 10049: The requested address is not valid in its context
Connecting to myself through my public IP through TCP
Webscraping with Python: WinError 10061: Target machine actively refused
Thank you to anyone who helps.
On your setup_confirm_button you're using command = setup() this should be command = setup or command = lambda: setup()
By calling setup() you're actually calling the function instead of setting it as a reference to the function for the command, and it's running your function then instead of on the button click.
The reason using lambda: setup() also works is because lambda creates an anonymous function.
Also, in your multiprocessing process you're likewise calling resv() instead of passing resv this is calling the function with a while loop and blocking the main event loop.
Related
I want use this code to get cpu temperature from my raspberry_pi and if the temperature is too high sending an warn email , the code show below:
# coding=utf-8
import os
import smtplib
from email.mime.text import MIMEText
# At First we have to get the current CPU-Temperature with this defined function
def getCPUtemperature():
res = os.popen('vcgencmd measure_temp').readline()
return (res.replace("temp=", "").replace("'C\n", ""))
# Now we convert our value into a float number
temp = float(getCPUtemperature())
# Check if the temperature is abouve 30°C (test with 30)
if (temp > 30):
# Enter your smtp Server-Connection
server = smtplib.SMTP('smtpmail.provider.com', 587)
# if your using gmail: smtp.gmail.com
server.ehlo()
server.starttls()
server.ehlo
# Login
server.login("your email or username", "your Password")
# Now comes the Text we want to send:
value = "Critical warning! The actual temperature is: " + getCPUtemperature()
msg = MIMEText(value)
# The Subject of your E-Mail
msg['Subject'] = "Critical warning! Temperature:" + getCPUtemperature()
# Consigner of your E-Mail
msg['From'] = "Raspberry Pi"
# recipient of your E-Mail
msg['To'] = "recipient#gmail.com"
# Finally send the mail
server.sendmail("consigner#gmail.com", "recipient#gmail.com", msg.as_string())
server.quit()
print "Everything was working fine! Best regards www.quaintproject.wordpress.com"
this code should working and had previous successful examples , but when I run it the output like this:
pi#raspberrypi:~ $ sudo nano tempwarn.py
pi#raspberrypi:~ $ sudo python tempwarn.py
Traceback (most recent call last):
File "tempwarn.py", line 20, in <module>
server = smtplib.SMTP('smtpmail.provider.com', 587)
File "/usr/lib/python2.7/smtplib.py", line 256, in __init__
(code, msg) = self.connect(host, port)
File "/usr/lib/python2.7/smtplib.py", line 317, in connect
self.sock = self._get_socket(host, port, self.timeout)
File "/usr/lib/python2.7/smtplib.py", line 292, in _get_socket
return socket.create_connection((host, port), timeout)
File "/usr/lib/python2.7/socket.py", line 557, in create_connection
for res in getaddrinfo(host, port, 0, SOCK_STREAM):
socket.gaierror: [Errno -2] Name or service not known
why it has this kind of error? and im pretty sure the 587 is correct setting for gmail.
swap smtpmail.provider.com to smtp.gmail.com
Code
import trio
from trio import socket
async def listen(host, port):
while True:
fullmsg = ""
sock = socket.socket()
await sock.bind((host, port))
sock.listen()
print(f'Awaiting Receive On {host}:{port}')
conn, addr = await sock.accept()
print(f'Connection Received From {addr[0]}:{addr[1]}')
while True:
try:
msg = await conn.recv(8)
if len(msg.decode().strip()) > 0:
print(f'Received {len(msg.strip())} bytes')
fullmsg += msg.decode().strip()
else:
break
except Exception as e:
print(f'DEBUG: {e}')
sock.shutdown(0)
sock.close()
print(fullmsg)
# function that runs the listen function:
async def create():
async with trio.open_nursery() as nursery:
nursery.start_soon(listen, '127.0.0.1', 6969)
# To run the program
trio.run(create)
I want to run the function over and over again everytime it receives a message of length 0 or when the connection gets closed by the client but when the function completes the first iteration of the first while loop, it gives an OSError saying the port is already in use. I close and shutdown my sockets by the ending of the loop but I still don't know where the program is erroring out.
Output Of The Program
Awaiting Receive On 127.0.0.1:6969
Connection Received From 127.0.0.1:37122
Received 8 bytes
Received 5 bytes
Hello, World!
Traceback (most recent call last):
File "./ape.py", line 68, in <module>
trio.run(create)
File "/usr/local/lib/python3.8/dist-packages/trio/_core/_run.py", line 1804, in run
raise runner.main_task_outcome.error
File "./ape.py", line 59, in create
nursery.start_soon(listen, '127.0.0.1', 6969)
File "/usr/local/lib/python3.8/dist-packages/trio/_core/_run.py", line 730, in __aexit__
raise combined_error_from_nursery
File "./ape.py", line 15, in listen
await sock.bind((host, port))
File "/usr/local/lib/python3.8/dist-packages/trio/_socket.py", line 473, in bind
return self._sock.bind(address)
OSError: [Errno 98] Address already in use
Like others said in their comments, the problem is that on Unix-y platforms, you have to set the SO_REUSEADDR socket option if you want to be able to close a listening socket and then immediately open a new one bound to the same port.
Note that on Windows, though, you should never set the SO_REUSEADDR option, because on Windows, the behavior you want is enabled by default, and SO_REUSEADDR is redefined to be a "turn off security" option.
trio.socket is very low-level and exposes all these details, so if you want to deal with them yourself it lets you do that. But most users will be better off using the higher level helpers like trio.serve_tcp, which will handle a lot of these details automatically.
I am using tesseract to perform OCR on screengrabs. I have an app using a tkinter window leveraging self.after in the initialization of my class to perform constant image scrapes and update label, etc values in the tkinter window. I have searched for multiple days and can't find any specific examples how to leverage CREATE_NO_WINDOW with Python3.6 on a Windows platform calling tesseract with pytesseract.
This is related to this question:
How can I hide the console window when I run tesseract with pytesser
I have only been programming Python for 2 weeks and don't understand what/how to perform the steps in the above question. I opened up the pytesseract.py file and reviewed and found the proc = subprocess.Popen(command, stderr=subproces.PIPE) line but when I tried editing it I got a bunch of errors that I couldn't figure out.
#!/usr/bin/env python
'''
Python-tesseract. For more information: https://github.com/madmaze/pytesseract
'''
try:
import Image
except ImportError:
from PIL import Image
import os
import sys
import subprocess
import tempfile
import shlex
# CHANGE THIS IF TESSERACT IS NOT IN YOUR PATH, OR IS NAMED DIFFERENTLY
tesseract_cmd = 'tesseract'
__all__ = ['image_to_string']
def run_tesseract(input_filename, output_filename_base, lang=None, boxes=False,
config=None):
'''
runs the command:
`tesseract_cmd` `input_filename` `output_filename_base`
returns the exit status of tesseract, as well as tesseract's stderr output
'''
command = [tesseract_cmd, input_filename, output_filename_base]
if lang is not None:
command += ['-l', lang]
if boxes:
command += ['batch.nochop', 'makebox']
if config:
command += shlex.split(config)
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
status = proc.wait()
error_string = proc.stderr.read()
proc.stderr.close()
return status, error_string
def cleanup(filename):
''' tries to remove the given filename. Ignores non-existent files '''
try:
os.remove(filename)
except OSError:
pass
def get_errors(error_string):
'''
returns all lines in the error_string that start with the string "error"
'''
error_string = error_string.decode('utf-8')
lines = error_string.splitlines()
error_lines = tuple(line for line in lines if line.find(u'Error') >= 0)
if len(error_lines) > 0:
return u'\n'.join(error_lines)
else:
return error_string.strip()
def tempnam():
''' returns a temporary file-name '''
tmpfile = tempfile.NamedTemporaryFile(prefix="tess_")
return tmpfile.name
class TesseractError(Exception):
def __init__(self, status, message):
self.status = status
self.message = message
self.args = (status, message)
def image_to_string(image, lang=None, boxes=False, config=None):
'''
Runs tesseract on the specified image. First, the image is written to disk,
and then the tesseract command is run on the image. Tesseract's result is
read, and the temporary files are erased.
Also supports boxes and config:
if boxes=True
"batch.nochop makebox" gets added to the tesseract call
if config is set, the config gets appended to the command.
ex: config="-psm 6"
'''
if len(image.split()) == 4:
# In case we have 4 channels, lets discard the Alpha.
# Kind of a hack, should fix in the future some time.
r, g, b, a = image.split()
image = Image.merge("RGB", (r, g, b))
input_file_name = '%s.bmp' % tempnam()
output_file_name_base = tempnam()
if not boxes:
output_file_name = '%s.txt' % output_file_name_base
else:
output_file_name = '%s.box' % output_file_name_base
try:
image.save(input_file_name)
status, error_string = run_tesseract(input_file_name,
output_file_name_base,
lang=lang,
boxes=boxes,
config=config)
if status:
errors = get_errors(error_string)
raise TesseractError(status, errors)
f = open(output_file_name, 'rb')
try:
return f.read().decode('utf-8').strip()
finally:
f.close()
finally:
cleanup(input_file_name)
cleanup(output_file_name)
def main():
if len(sys.argv) == 2:
filename = sys.argv[1]
try:
image = Image.open(filename)
if len(image.split()) == 4:
# In case we have 4 channels, lets discard the Alpha.
# Kind of a hack, should fix in the future some time.
r, g, b, a = image.split()
image = Image.merge("RGB", (r, g, b))
except IOError:
sys.stderr.write('ERROR: Could not open file "%s"\n' % filename)
exit(1)
print(image_to_string(image))
elif len(sys.argv) == 4 and sys.argv[1] == '-l':
lang = sys.argv[2]
filename = sys.argv[3]
try:
image = Image.open(filename)
except IOError:
sys.stderr.write('ERROR: Could not open file "%s"\n' % filename)
exit(1)
print(image_to_string(image, lang=lang))
else:
sys.stderr.write('Usage: python pytesseract.py [-l lang] input_file\n')
exit(2)
if __name__ == '__main__':
main()
The code I am leveraging is similar to the example in the similar question:
def get_string(img_path):
# Read image with opencv
img = cv2.imread(img_path)
# Convert to gray
img = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)
# Apply dilation and erosion to remove some noise
kernel = np.ones((1, 1), np.uint8)
img = cv2.dilate(img, kernel, iterations=1)
img = cv2.erode(img, kernel, iterations=1)
# Write image after removed noise
cv2.imwrite(src_path + "removed_noise.png", img)
# Apply threshold to get image with only black and white
# Write the image after apply opencv to do some ...
cv2.imwrite(src_path + "thres.png", img)
# Recognize text with tesseract for python
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
return result
When it gets to the following line, there is a flash of a black console window for less than a second and then it closes when it runs the command.
result = pytesseract.image_to_string(Image.open(src_path + "thres.png"))
Here is the picture of the console window:
Program Files (x86)_Tesseract
Here is what is suggested from the other question:
You're currently working in IDLE, in which case I don't think it
really matters if a console window pops up. If you're planning to
develop a GUI app with this library, then you'll need to modify the
subprocess.Popen call in pytesser.py to hide the console. I'd first
try the CREATE_NO_WINDOW process creation flag. – eryksun
I would greatly appreciate any help for how to modify the subprocess.Popen call in the pytesseract.py library file using CREATE_NO_WINDOW. I am also not sure of the difference between pytesseract.py and pytesser.py library files. I would leave a comment on the other question to ask for clarification but I can't until I have more reputation on this site.
I did more research and decided to learn more about subprocess.Popen:
Documentation for subprocess
I also referenced the following articles:
using python subprocess.popen..can't prevent exe stopped working prompt
I changed the original line of code in pytesseract.py:
proc = subprocess.Popen(command, stderr=subprocess.PIPE)
to the following:
proc = subprocess.Popen(command, stderr=subprocess.PIPE, creationflags = CREATE_NO_WINDOW)
I ran the code and got the following error:
Exception in Tkinter callback Traceback (most recent call last):
File
"C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\tkinter__init__.py",
line 1699, in call
return self.func(*args) File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line
403, in gather_data
update_cash_button() File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line
208, in update_cash_button
currentCash = get_string(src_path + "cash.png") File "C:\Users\Steve\Documents\Stocks\QuickOrder\QuickOrderGUI.py", line
150, in get_string
result = pytesseract.image_to_string(Image.open(src_path + "thres.png")) File
"C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pytesseract\pytesseract.py",
line 125, in image_to_string
config=config) File "C:\Users\Steve\AppData\Local\Programs\Python\Python36-32\lib\site-packages\pytesseract\pytesseract.py",
line 49, in run_tesseract
proc = subprocess.Popen(command, stderr=subprocess.PIPE, creationflags = CREATE_NO_WINDOW) NameError: name 'CREATE_NO_WINDOW'
is not defined
I then defined the CREATE_NO_WINDOW variable:
#Assignment of the value of CREATE_NO_WINDOW
CREATE_NO_WINDOW = 0x08000000
I got the value of 0x08000000 from the above linked article. After adding the definition I ran the application and I didn't get any more console window popups.
I'm trying to write a simple telnet client that just runs a single command on a remote box using telnet. This needs to run over asyncio as other tasks are monitored at the same time under that framework.
I got it almost working, with the code below, that I tweaked from telnet-client as part of the telnetlib3 library; except that it does not return. I've had a hard time trying to figure what this protocol.waiter_closed is all about.
In any case, how do I need to tweak this code so that it returns once the command has been dealt with on the remote end ?
Thanks
#!/usr/bin/env python3
import logging
import asyncio
import telnetlib3
# just to check that connection is thrown away
class MyClient(telnetlib3.TelnetClient):
def connection_lost(self, *args):
print("connection lost on client {} - args={}".format(self, args))
#asyncio.coroutine
def register_telnet_command(loop, Client, host, port, command):
transport, protocol = yield from loop.create_connection(Client, host, port)
print("{} async connection OK for command {}".format(host, command))
def send_command():
EOF = chr(4)
EOL = '\n'
# adding newline and end-of-file for this simple example
command_line = command + EOL + EOF
protocol.stream.write(protocol.shell.encode(command_line))
# one shot invokation of the command
loop.call_soon(send_command)
# what does this do exactly ?
yield from protocol.waiter_closed
port = 23
hostname = "fit01"
def main():
def ClientFactory():
return MyClient(encoding='utf-8', shell = telnetlib3.TerminalShell)
# create as many clients as we have hosts
loop = asyncio.get_event_loop()
loop.run_until_complete(
register_telnet_command(loop, log, ClientFactory,
host = hostname, port = port,
command = "id"))
return 0
main()
Sorry, my mistake, redefining close_connection without calling the code from telnetlib3.connection_lost is a bad idea, since this is the code that populates waiter_closed.
I should have done
class MyClient(telnetlib3.TelnetClient):
def connection_lost(self, *args):
print("connection lost on client {} - args={}".format(self, args))
super().connection_lost(*args)
I have a GUI application which launches some commands using subprocess and then shows the progress of this commands by reading from subprocess.Popen.stdout and using wx.ProgressDialog. I've written the app under Linux and it works flawlessly there, but I'm now doing some testing under windows and it seems that trying to update the progress dialog causes the app to hang. There are no error messages or anything, so it's difficult for me to figure out what's happening. Below is a simplified code:
The subprocess is launched in separate thread by this method in main thread:
def onOk(self,event):
""" Starts processing """
self.infotxt.Clear()
args = self.getArgs()
self.stringholder = args['outfile']
if (args):
cmd = self.buildCmd(args, True)
if (cmd):
# Make sure the output directory is writable.
if not self.isWritable(args['outfile']):
print "Cannot write to %s. Make sure you have write permission or select a different output directory." %os.path.dirname(args['outfile'])
else:
try:
self.thread = threading.Thread(target=self.runCmd,args=(cmd,))
self.thread.setDaemon(True)
self.thread.start()
except Exception:
sys.stderr.write('Error starting thread')
And here's the runCmd method:
def runCmd(self, cmd):
""" Runs a command line provided as a list of arguments """
temp = []
aborted = False
dlg = None
for i in cmd:
temp.extend(i.split(' '))
# Use wx.MutexGuiEnter()/MutexGuiLeave() for anything that accesses GUI from another thread
wx.MutexGuiEnter()
max = 100
stl = wx.PD_CAN_ABORT | wx.PD_APP_MODAL | wx.PD_ELAPSED_TIME | wx.PD_REMAINING_TIME
dlg = wx.ProgressDialog("Please wait", "Processing...", maximum = max, parent = self.frame, style=stl)
wx.MutexGuiLeave()
# This is for windows to not display the black command line window when executing the command
if os.name == 'nt':
si = subprocess.STARTUPINFO()
si.dwFlags |= subprocess.STARTF_USESHOWWINDOW
si.wShowWindow = subprocess.SW_HIDE
else:
si = None
try:
proc = subprocess.Popen(temp, shell=False, bufsize=1, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
except Exception:
sys.stderr.write('Error executing a command. ')
# Progress dialog
count = 0
while True:
line=proc.stdout.readline()
count += 1
wx.MutexGuiEnter()
if dlg.Update(count) == (True, False):
print line.rstrip()
wx.MutexGuiLeave()
if not line: break
else:
print "Processing cancelled."
aborted = True
wx.MutexGuiLeave()
proc.kill()
break
wx.MutexGuiEnter()
dlg.Destroy()
wx.GetApp().GetTopWindow().Raise()
wx.MutexGuiLeave()
if aborted:
if os.path.exists(self.stringholder):
os.remove(self.stringholder)
dlg.Destroy()
proc.wait()
Again this works fine under Linux, but freezes on Windows. If I remove dlg.Update() line it also works fine. The subprocess output is printed out in main window and ProgressDialog is shown, just progressbar doesn't move. What am I missing?
Try not using wx.MutexGuiEnter and wx.MutexGuiLeave. You can handle updating the GUI from another thread using wx.CallAfter. I have never seen anyone using those mutexes in wx application before and not even in tutorials or examples of using threads.