我需要设置 debug='false'
<compilation debug="false" targetFramework="4.0" />
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即使在发布模式下发布我的代码.
正如MSDN编译概述中所述,它是在两个阶段完成的
发布代码是指第1阶段的部分,
<compilation ....是指阶段2.
我一直在尝试运行此代码,这是错误
File "C:/hari/Academics/python/py programs/gui qt4/book/calculator.py", line 27, in updateUi
text = unicode(self.lineedit.text(),'utf-8')
NameError: name 'unicode' is not defined
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代码 :
from __future__ import division
from math import *
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys
class Form(QDialog):
def __init__(self,parent =None):
super(Form,self).__init__(parent)
self.browser =QTextBrowser()
self.lineedit =QLineEdit("type an exp")
self.lineedit.selectAll()
layout=QVBoxLayout()
layout.addWidget(self.browser)
layout.addWidget(self.lineedit)
self.setLayout(layout)
self.lineedit.setFocus()
self.connect(self.lineedit, SIGNAL("returnPressed()"), self.updateUi)
self.setWindowTitle("Calculate")
def updateUi(self):
try:
text = unicode(self.lineedit.text())
print(type(text))
self.browser.append(text+" = <b>"+eval(text)+"</b>" )
except:
self.browser.append("<font color=red>"+ text + " is invalid</font>")
app=QApplication(sys.argv) …Run Code Online (Sandbox Code Playgroud) 我试图从使用Python 3中的正则表达式的文本文件中的wiki标题转储中提取英文标题.Wiki转储包含其他语言的标题和一些符号.以下是我的代码:
with open('/Users/some/directory/title.txt', 'rb')as f:
text=f.read()
letters_only = re.sub(b"[^a-zA-Z]", " ", text)
words = letters_only.lower().split()
print(words)
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但我收到一个错误:
TypeError: sequence item 1: expected a bytes-like object, str found
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在线: letters_only = re.sub(b"[^a-zA-Z]", " ", text)
但是,我使用b''输出作为字节类型,下面是文本文件的示例:
Destroy-Oh-Boy!!
!!Que_Corra_La_Voz!!
!!_(chess)
!!_(disambiguation)
!'O!Kung
!'O!Kung_language
!'O-!khung_language
!337$P34K
!=
!?
!?!
!?Revolution!?
!?_(chess)
!A_Luchar!
!Action_Pact!
!Action_pact!
!Adios_Amigos!
!Alabadle!
!Alarma!
!Alarma!_(album)
!Alarma!_(disambiguation)
!Alarma!_(magazine)
!Alarma!_Records
!Alarma!_magazine
!Alfaro_Vive,_Carajo!
!All-Time_Quarterback!
!All-Time_Quarterback!_(EP)
!All-Time_Quarterback!_(album)
!Alla_tu!
!Amigos!
!Amigos!_(Arrested_Development_episode)
!Arriba!_La_Pachanga
!Ask_a_Mexican!
!Atame!
!Ay,_Carmela!_(film)
!Ay,_caramba!
!BANG!
!Bang!
!Bang!_TV
!Basta_Ya!
!Bastardos!
!Bastardos!_(album) …Run Code Online (Sandbox Code Playgroud) 这或多或少是一个关于使用示例代码将函数指针转换为另一个类型的澄清请求
struct my_struct;
void my_callback_function(struct my_struct* arg);
void do_stuff(void (*cb)(void*));
static void my_callback_helper(void* pv)
{
my_callback_function(pv);
}
int main()
{
do_stuff(&my_callback_helper);
}
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答案说一个"好"的编译器应该能够优化my_callback_helper()函数,但是我发现在https://gcc.godbolt.org
上没有编译器来执行它并且辅助函数总是生成,即使它只是跳转到my_callback_function()( - O3):
my_callback_helper:
jmp my_callback_function
main:
subq $8, %rsp
movl $my_callback_helper, %edi
call do_stuff
xorl %eax, %eax
addq $8, %rsp
ret
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所以我的问题是:标准中是否有任何东西阻止编译器消除帮助?
我有一个程序需要在新的 CMD 中运行小任务。例如:
def main()
some code
...
proc = subprocess.Popen("start.bat")
some code...
proc.kill()
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subprocess,Popen 打开一个新的 cmd 窗口并在其中运行“start.bat”。proc.kill() 终止进程但不关闭 cmd 窗口。有没有办法关闭这个 cmd 窗口?
我想命名打开的 cmd 窗口,以便我可以使用以下命令杀死它:
/taskkill /f /im cmdName.exe
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有可能吗?如果没有,你有什么建议?
编辑、添加最小、完整和可验证示例:
一个.py:
import subprocess,time
proc = subprocess.Popen("c.bat",creationflags=subprocess.CREATE_NEW_CONSOLE)
time.sleep(5)
proc.kill()
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b.py
while True:
print("IN")
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蝙蝠
python b.py
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我怀疑选择的pip包安装问题.但同样适用于基于Linux的系统.pip安装的操作系统是否会有任何差异
Exception:
Traceback (most recent call last):
File "c:\python27\lib\site-packages\pip\basecommand.py", line 215, in main
status = self.run(options, args)
File "c:\python27\lib\site-packages\pip\commands\install.py", line 324, in run
requirement_set.prepare_files(finder)
File "c:\python27\lib\site-packages\pip\req\req_set.py", line 380, in prepare_files
ignore_dependencies=self.ignore_dependencies))
File "c:\python27\lib\site-packages\pip\req\req_set.py", line 620, in _prepare_file
session=self.session, hashes=hashes)
File "c:\python27\lib\site-packages\pip\download.py", line 821, in unpack_url
hashes=hashes
File "c:\python27\lib\site-packages\pip\download.py", line 663, in unpack_http_url
unpack_file(from_path, location, content_type, link)
File "c:\python27\lib\site-packages\pip\utils\__init__.py", line 605, in unpack_file
untar_file(filename, location)
File "c:\python27\lib\site-packages\pip\utils\__init__.py", line 553, in untar_file
ensure_dir(path)
File "c:\python27\lib\site-packages\pip\utils\__init__.py", line 83, in ensure_dir
os.makedirs(path)
File …Run Code Online (Sandbox Code Playgroud) 我有一个按钮可以在我的代码上打开一个新窗口,我一直在尝试使该按钮打开一个名为“newest_release_window”的新窗口,并考虑到两件事:
不幸的是,它变得太复杂了,我一生都无法弄清楚如何去做。问题是我无法让代码检测“newest_release_window”是否打开,并据此更改变量。
welcome_window = Tk()
welcome_window.title("Games R Us")
welcome_window.geometry("360x350")
welcome_window.configure(bg = "gold")
currentDisplay = 10
newest_release_windowtracker = 0
gui_font_5 = ("Helvetica", 5, "bold")
gui_font_10 = ("Helvetica", 10, "bold")
gui_font_15 = ("Helvetica", 15, "bold")
gui_font_20 = ("Helvetica", 20, "bold")
space_between = (5)
button_variable = IntVar()
def newwindow_newest_release():
global newest_release_windowtracker
newest_release_window = Tk()
newest_release_window.title("Games R Us")
newest_release_window.geometry("360x350")
newest_release_window.configure(bg = "greenyellow")
currentDisplay = 10
display = Label(newest_release_window, text="Humm, see a new window !",
bg ="limegreen")
display.pack()
newest_release_window.withdraw()
if newest_release_windowtracker == 0: …Run Code Online (Sandbox Code Playgroud) 如何使用 python 读取 ZIP 文件注释?我尝试使用
import zipfile
archive = zipfile.ZipFile('D:\XXX\Desktop\MyZip.zip', 'r')
comment = archive.comment("firstobj.1")
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但它不起作用......任何帮助将不胜感激:)谢谢
我正在尝试通过 IFRAME 共享 Google 地图,但控制台中出现此错误
图书馆检索未知。请参阅https://developers.google.com/maps/documentation/javascript/libraries
<iframe src="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d2795.5423816131142!2d11.312607315808078!3d45.519289937786425!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x477f48c46ad35441%3A0x9a16514436b0fe8e!2sMarmi%20Zem%20di%20Ziche%20Enrico!5e0!3m2!1sit!2sit!4v1676708610573!5m2!1sit!2sit" width="600" height="450" style="border:0;" allowfullscreen="" loading="lazy" referrerpolicy="no-referrer-when-downgrade"></iframe>
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<iframe src="https://www.google.com/maps/embed?pb=!1m18!1m12!1m3!1d2795.5423816131142!2d11.312607315808078!3d45.519289937786425!2m3!1f0!2f0!3f0!3m2!1i1024!2i768!4f13.1!3m3!1m2!1s0x477f48c46ad35441%3A0x9a16514436b0fe8e!2sMarmi%20Zem%20di%20Ziche%20Enrico!5e0!3m2!1sit!2sit!4v1676708610573!5m2!1sit!2sit" width="600" height="450" style="border:0;" allowfullscreen="" loading="lazy" referrerpolicy="no-referrer-when-downgrade"></iframe>
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你知道为什么吗?
我已经为课程安装了 Git Bash、python 3.6 和 Anaconda,这要求我在 Jupyter 中使用 Unix 命令,例如 !ls、!cat、!head 等。但是,对于这些命令中的每一个,我得到(例如):
'ls' 不是内部或外部命令,也不是可运行的程序或批处理文件。
我使用的是 Windows 10。我该怎么做才能继续学习课程?谢谢!
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