有没有办法执行以下工作流程:
我尝试使用预先签名的部分URL进行分段上传,但未成功。
这是我遵循的过程(1-3在服务器端,4在客户端):
import boto3
from botocore.client import Config
s3 = boto3.client(
"s3",
region_name=aws.default_region,
aws_access_key_id=aws.access_key_id,
aws_secret_access_key=aws.secret_access_key,
config=Config(signature_version="s3v4")
)
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upload = s3.create_multipart_upload(
Bucket=AWS_S3_BUCKET,
Key=key,
Expires=datetime.now() + timedelta(days=2),
)
upload_id = upload["UploadId"]
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part = generate_part_object_from_client_submited_data(...)
part.presigned_url = s3.generate_presigned_url(
ClientMethod="upload_part",
Params={
"Bucket": AWS_S3_BUCKET,
"Key": upload_key,
"UploadId": upload_id,
"PartNumber": part.no,
"ContentLength": part.size,
"ContentMD5": part.md5,
},
ExpiresIn=3600, # 1h
HttpMethod="PUT",
)
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将预签名的URL返回给客户端。
requests。part = receive_part_object_from_server(...)
with io.open(filename, "rb") as f:
f.seek(part.offset)
buffer = io.BytesIO(f.read(part.size))
r = requests.put(
part.presigned_url,
data=buffer,
headers={ …Run Code Online (Sandbox Code Playgroud) Mac似乎已经安装了Python.brew医生得出这个:
brew doctor
Warning: "config" scripts exist outside your system or Homebrew directories.
`./configure` scripts often look for *-config scripts to determine if
software packages are installed, and what additional flags to use when
compiling and linking.
Having additional scripts in your path can confuse software installed via
Homebrew if the config script overrides a system or Homebrew provided
script of the same name. We found the following "config" scripts:
/Library/Frameworks/Python.framework/Versions/2.7/bin/python-config
/Library/Frameworks/Python.framework/Versions/2.7/bin/python2-config
/Library/Frameworks/Python.framework/Versions/2.7/bin/python2.7-config
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我应该删除这些配置文件,还是会导致问题?为了我:
> which python
/Library/Frameworks/Python.framework/Versions/2.7/bin/python
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也:
$ …Run Code Online (Sandbox Code Playgroud) 我想用屏幕填充屏幕上的整行,*并在断线前停止?
像这样的东西
********** MENU **********
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谢谢
我正在尝试在Python中裁剪和调整图像大小,我希望它们之后是固定格式(47x62像素).但是,如果原始图像是横向的,我的算法不起作用,有空白区域.
import Image, sys
MAXSIZEX = 47
MAXSIZEY = 62
im = Image.open(sys.argv[1])
(width, height) = im.size
ratio = 1. * MAXSIZEX / MAXSIZEY
im = im.crop((0, 0, int(width*ratio), int(height*ratio)))
im = im.resize((MAXSIZEX, MAXSIZEY), Image.ANTIALIAS)
im.save(sys.argv[2])
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我希望调整大小的图像完全是47x62 - 应该没有可见的空白区域.
我会创建一个带有 3 个选项的按钮,当您做出选择时,该按钮会更改其文本。
这个解决方案对我有用:
def swTrigger(self):
self.setTrigger(self.ui.triggerButton,'Software')
def hwTrigger(self):
self.setTrigger(self.ui.triggerButton,'Hardware')
def bothTrigger(self):
self.setTrigger(self.ui.triggerButton,'Both')
def setTrigger(self,pushButton,value):
pushButton.setText(value)
#other actions
def uiConfig(self):
##triggerbutton configuration
menu = QtGui.QMenu()
menu.addAction('Software',self.swTrigger)
menu.addAction('Hardware',self.hwTrigger)
menu.addAction('Both', self.bothTrigger)
self.ui.triggerButton.setText("Software")
self.ui.triggerButton.setMenu(menu)
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但是我想避免为每个菜单项制作一个方法,因为我想制作动态菜单条目。
有一个更好的方法吗?
我可以通过以下方式在matplotlib中设置绘图的颜色和样式:
import matplotlib.pyplot as plt
fig = plt.figure()
ax = fig.add_subplot(1,1,1)
ax.plot([1,2,3],[1,2,3], 'r-')
plt.show()
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这有效,但是:
我只能使用一个字符指定的颜色,如'r','k'等.最好能够使用matplotlib接受的HTML颜色名称.
我可能必须提前准备将要传递的字符串,做类似的事情
fmt = 'r' + '_'
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obj.set_color('Aquamarine')
obj.set_style('-')
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我找不到办法做到这一点.
我的想法是在中显示一个密码输入框QtGui MainWindow.在执行密码检查后,它将调用程序以显示其余按钮.我希望我的密码输入框是这样的

这是我的代码:
class MainWindow(QtGui.QMainWindow):
def __init__(self,parent = None):
super(MainWindow,self).__init__(parent)
self.CheckPassword()
def CheckPassword(self):
username_label = QtGui.QLabel("Username :")
password_label = QtGui.QLabel("Password :")
_username = QtGui.QLineEdit()
_password = QtGui.QLineEdit()
password_layout = QtGui.QGridLayout()
password_layout.addWidget(username_label,1,0)
password_layout.addWidget(password_label,2,0)
password_layout.addWidget(_username,1,1)
password_layout.addWidget(_password,2,1)
password_widget = QtGui.QWidget()
password_widget.setLayout(password_layout)
self.setCentralWidget(password_widget)
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我的问题是,因为我将窗口小部件设置为变得centralwidget像窗口一样大.
所以我尝试设置使用,setMaximumSize但在这种情况下,我似乎无法将小部件放在中心位置MainWindow.
如何为我的密码输入设置QWidget的大小,并将其定位为始终居中,无论主窗口的大小是多少?