python-2.7

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . Improve this question I've tried using pyinstaller to package a simple hello world example using both pyqt and wxPython and both of them were about 15mb to 20mb. Why is it so big , its not practical for simple apps. Is there any other cross-platform solutions? 回答1: For small

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . Improve this question I've tried using pyinstaller to package a simple hello world example using both pyqt and wxPython and both of them were about 15mb to 20mb. Why is it so big , its not practical for simple apps. Is there any other cross-platform solutions? 回答1: For small

问题 Closed. This question does not meet Stack Overflow guidelines. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 7 years ago . Improve this question I've tried using pyinstaller to package a simple hello world example using both pyqt and wxPython and both of them were about 15mb to 20mb. Why is it so big , its not practical for simple apps. Is there any other cross-platform solutions? 回答1: For small

问题 I recently installed pyusb for this project, which is trying to attempt at writing to a USB LED Message Board and received this error: AttributeError: 'module' object has no attribute 'backend' I don't know why this is, I checked the pyusb module files and it clearly has a folder named "backend" and inside has the correct files. Here's all of my code: import usb.core import usb.util import sys backend = usb.backend.libusb01.get_backend(find_library=lambda C: "Users\absolute\Desktop\libusb

问题 Is it possible to type a specific width of tab using \t , or is it a system defined length? Example code: print 'test\ttest 2' 回答1: It is not possible. But, you can replace every tab with custom amounts of spaces using str.expandtabs: print repr('test\ttest 2'.expandtabs()) # output: 'test test 2' print repr('test\ttest 2'.expandtabs(2)) # output: 'test test Edit : note that when using str.expandtabs , the width of tab will depend on where in string the tab is: print repr('test\ttest 2'

问题 Is it possible to type a specific width of tab using \t , or is it a system defined length? Example code: print 'test\ttest 2' 回答1: It is not possible. But, you can replace every tab with custom amounts of spaces using str.expandtabs: print repr('test\ttest 2'.expandtabs()) # output: 'test test 2' print repr('test\ttest 2'.expandtabs(2)) # output: 'test test Edit : note that when using str.expandtabs , the width of tab will depend on where in string the tab is: print repr('test\ttest 2'

问题 If I use tf.transpose does it also change the memory layout? In numpy it is used the function np.ascontiguousarray . I mean this would be important if I use cuda. Because it makes a difference if the memory layout is [N C H W] or [N H W C]. (N ... Nr of samples, H ... array height, W ... array width, C ... array depth, e.g. RGB) How to check this? 回答1: If you read carefully the documentation you can find the answer: Numpy Compatibility In numpy transposes are memory-efficient constant time

问题 I have a single column table. I need to insert values in this column. The program runs correctly without errors. But when I check the database, nothing gets inserted. When I added another column to the code and table, the program inserts data correctly. Can you tell me how to insert data for a single column table? This is the single column code that does not insert anything to the table. import MySQLdb conn = MySQLdb.connect(host= "localhost", user="root", passwd="123", db="dbname") cursor =

问题 I have a single column table. I need to insert values in this column. The program runs correctly without errors. But when I check the database, nothing gets inserted. When I added another column to the code and table, the program inserts data correctly. Can you tell me how to insert data for a single column table? This is the single column code that does not insert anything to the table. import MySQLdb conn = MySQLdb.connect(host= "localhost", user="root", passwd="123", db="dbname") cursor =

问题 It is possible to have Latex formatting in pyplot diagrams, i.e. for title, labels etc. #some dummy code plt.plot(x,y,label = r"$a < \gamma$") It is generated by adding an r before the actual latex string. Now, pyplot accepts variables as inputs for strings, i.e. #some dummy code foo = "some fancy label" plt.plot(x,y, label = foo) I would like to combine the two worlds, however the only answer I found on SO is for Julia. How can I make this work? 回答1: The example would look like: foo = r"some