我想知道如何在单击按钮后更改标签文本。例如:
from Tkinter import *
import tkMessageBox
def onclick():
pass
root = Tk()
root.title("Pantai Hospital")
L1 = Label(root, text='Welcome to Pantai Hospital!')
L1.pack()
L2 = Label(root, text='Login')
L2.pack()
L3 = Label(root, text = "Username:")
L3.pack( side = LEFT, padx = 5, pady = 10)
username = StringVar()
E1 = Entry(root, textvariable = username, width = 40)
E1.pack ( side = LEFT)
L4 = Label(root, text = "Password:")
L4.pack( side = LEFT, padx = 5, pady = 10)
password = StringVar() …Run Code Online (Sandbox Code Playgroud) 我正在尝试使用 q Learning 来自动化我的游戏,并正在考虑使用 colab 来获得一些额外的 GPU 支持。安装需求并运行代码后,colab 给出以下错误:
> error:
> Traceback (most recent call last)
<ipython-input-16-28b090095233> in <module>()
5
6 pygame.font.init()
----> 7 pygame.display.list_modes()
8 pygame.init()
9
>error: video system not initialized
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如果有人可以解决这个错误或者告诉我如何使用VNC来解决这个问题。
我pygame .init()也尝试过pygame.display.list_modes()
我正在WSGIServer使用地址运行'0.0.0.0'
from gevent import pywsgi
from geventwebsocket.handler import WebSocketHandler
server = pywsgi.WSGIServer(('0.0.0.0', 5002), app, handler_class=WebSocketHandler)
server.serve_forever()
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哪个会产生错误TypeError: an integer is required (got type bytes)
如果我改变'0.0.0.0'一切'127.0.0.1'都很好。
我在 MacOS 10.14.6 上使用 Python 3.8
这是完整的错误
Traceback (most recent call last):
File "/Users/ronharlev/Documents/MyProject/streaming_server.py", line 174, in run_process
server.serve_forever()
File "/Users/ronharlev/Documents/MyProject/venv/lib/python3.8/site-packages/gevent/baseserver.py", line 367, in serve_forever
self.start()
File "/Users/ronharlev/Documents/MyProject/venv/lib/python3.8/site-packages/gevent/baseserver.py", line 305, in start
self.init_socket()
File "/Users/ronharlev/Documents/MyProject/venv/lib/python3.8/site-packages/gevent/pywsgi.py", line 1491, in init_socket
self.update_environ()
File "/Users/ronharlev/Documents/MyProject/venv/lib/python3.8/site-packages/gevent/pywsgi.py", line 1503, in update_environ
name …Run Code Online (Sandbox Code Playgroud) 尝试使用 findContours() 但不断收到 cpp:197 错误(-210: 不支持的格式或格式组合)
我在其他文件中使用了相同的格式,效果很好。不知道为什么它在这里不起作用。
完整错误:
Traceback (most recent call last):
File "C:/Users/FreddyMac/PycharmProjects/TestProj/ballTrackingAbsDiff.py", line 33, in <module>
cnts = cv2.findContours(th1, cv2.RETR_TREE, cv2.CHAIN_APPROX_SIMPLE)
cv2.error: OpenCV(4.4.0) C:\Users\appveyor\AppData\Local\Temp\1\pip-req-build-cff9bdsm\opencv\modules\imgproc\src\contours.cpp:197: error: (-210:Unsupported format or combination of formats) [Start]FindContours supports only CV_8UC1 images when mode != CV_RETR_FLOODFILL otherwise supports CV_32SC1 images only in function 'cvStartFindContours_Impl'
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我检查了图像的类型,它是正确的“uint8”类型。
请参阅下面的代码。
import cv2
import imutils
vs = cv2.VideoCapture('ballsFlying.MP4')
while True:
# read frame1, resize and convert to grayscale
ret, frame1 = vs.read()
if frame1 is None:
break
frame1 …Run Code Online (Sandbox Code Playgroud) 如何在我的PC上安装tkinter?
我尝试了一周来安装它。我想不明白。请帮忙。
它是如何工作的 ?您有安装它的网站吗?
我正在从adj矩阵制作图形,这是我的代码,我尝试首先制作图形,然后对该图形进行加权,如下所示
for element in elements:
senMatrix[int(element.matrix_row)-1,int(element.matrix_column)-1]=1
G=nx.from_numpy_matrix(senMatrix)
for element in elements:
G[int(element.matrix_row)-1][int(element.matrix_column)-1]['weight']=int(element.value)
print str(G.nodes())
print str(G.edges())
avgClusterNumber=nx.average_clustering(G,weight='weight')
clusterList=nx.clustering(G,weight='weight')
graphDiameter=nx.diameter(G)
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前两个函数运行没有问题,但是最后一个直径函数引发了无限路径长度的问题,这使我认为没有边缘,节点或其他东西。
在这里看到错误
networkx.exception.NetworkXError: Graph not connected: infinite path length
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当我打印出来时,我得到这个
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, …Run Code Online (Sandbox Code Playgroud) 当我使用该命令时scrapy crawl <project> -o <filename.csv>,我得到Item带有标题的字典输出.这很好.但是,如果文件已存在,我希望scrapy省略标题.scrapy能够做到这一点还是我需要实现该功能?
我在尝试从此特定 URL 下载数据并将其存储在 Pandas 数据框中时遇到问题。有人能帮忙吗?
url ='http://www2.conectiv.com/cpd/tps/archives/nj/2017/12/20171205NJA1.txt'
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我需要将每个存储Segment为一行,并在单独的列中使用相应的数字。所以,我需要这种格式:
NJAAP, 12/5/2017, 37.63, 36.34, 35.97,..., 38.52
NJAAS, 12/5/2017, 37.63, 36.34, ... etc
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我尝试了以下方法:
import pandas as pd
from urllib.request import urlopen
df = pd.read_csv(url, skiprows=4)
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但是,我没有得到我想要的。我得到了这个:
Segment:NJAAP 12/05/2017 37.63 36.34 35.97 35.76 36.71 39.90 46.36 52.49 56.16 58.41 58.98 59.60 59.58 58.52 57.40 54.34 53.90 53.15 51.44 49.49 46.96 44.12 41.02 38.52
0 Segment:NJAAS 12/05/2017 ...
1 Segment:NJADC 12/05/2017 ...
2 Segment:NJAGN 12/05/2017 ...
3 Segment:NJAGT 12/05/2017 ...
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有人可以帮忙吗?谢谢
import plotly.express as px
tips = px.data.tips()
tips
px.histogram(tips, x="total_bill", y="tip", histfunc="sum", color="smoker")
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只需几行,“提示”中就已经有所有这些数据,我很困惑这些数字来自哪里?非常感谢提示
Out[125]:
total_bill tip sex smoker day time size
0 16.99 1.01 Female No Sun Dinner 2
1 10.34 1.66 Male No Sun Dinner 3
2 21.01 3.50 Male No Sun Dinner 3
3 23.68 3.31 Male No Sun Dinner 2
4 24.59 3.61 Female No Sun Dinner 4
.. ... ... ... ... ... ... ...
239 29.03 5.92 Male No Sat Dinner 3
240 27.18 …Run Code Online (Sandbox Code Playgroud) 我在终端上安装了带有 pip3 install opencv-contrib-python 的 cv2 并且它可以工作,但是每当我尝试导入 cv2 或运行带有 cv2 导入的 vscode 文件时,它都会在 python IDLE 上说
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/cv2/__init__.py", line 3, in <module>
from .cv2 import *
ImportError: dlopen(/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/cv2/cv2.cpython-38-darwin.so, 2): Symbol not found: _inflateValidate
Referenced from: /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/cv2/.dylibs/libpng16.16.dylib (which was built for Mac OS X 10.13)
Expected in: /usr/lib/libz.1.dylib
in /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/cv2/.dylibs/libpng16.16.dylib
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在终端。知道如何解决这个问题吗?