Brief(er) message on topic:
Someone was having a problem that was traced to their use of a pipe to communicate between tasks that normally passes data in binary mode. They were offered solutions on how to convert the data that should work fine. I am offering a different solution from the Lutz Book I am currently reading: Programming Python: Powerful Object-Oriented Programming By Mark Lutz This is the snippet on-line: https://books.google.com/books?id=q8W3WQbNWmkC <https://books.google.com/books?id=q8W3WQbNWmkC&pg=PA226&lpg=PA226&dq=python +wrap+a+pipe&source=bl&ots=Y8ddhRkA2E&sig=NW2YygRxI9qUtJjMQx77Xhwfy88&hl=en& sa=X&ved=2ahUKEwj-sZygzv_eAhUCnFkKHbbxBu8Q6AEwCnoECAQQAQ#v=onepage&q=python% 20wrap%20a%20pipe&f=false> &pg=PA226&lpg=PA226&dq=python+wrap+a+pipe&source=bl&ots=Y8ddhRkA2E&sig=NW2Yy gRxI9qUtJjMQx77Xhwfy88&hl=en&sa=X&ved=2ahUKEwj-sZygzv_eAhUCnFkKHbbxBu8Q6AEwC noECAQQAQ#v=onepage&q=python%20wrap%20a%20pipe&f=false The key is to take one end of the pipe and wrap a file around it that then provides the interface that processes and returns raw data as text: In the parent, take the side of the pipe you read from, called pipein as in: pipe, pipeout = os.pipe and do this: pipein = os.fdopen(pipein) NOTE that their method does not use Popen() to sun a command. Your child process would need to start that program on their own. But the text received would not require further processing from binary. Many other solutions exist, such as on some systems using named pipes which can be opened in text mode. Even simpler is to run the external process with an argument like ">file" and have python open that file in text mode after it completes. These solutions do require having permission to create files and perhaps require additional effort to create a unique temp file. _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: https://mail.python.org/mailman/listinfo/tutor
