The error is pretty clear. The file hello.py is not an executable file. You need to specify the executable: You’ll need python.exe to be visible on the search path, or you could pass the full path to the executable file that is running the calling script:
You probably need to install it using one of (or something similar to) the following: You can also mention version number like this sudo apt-get install python3.7-tk for python 3.7. Why don’t you try this and let me know if it worked: Here is the reference link and here are the docs Better to check versions as suggested here: Or you … Read more
I have set up PHP, MySQL, and Apache. localhost() for PHP and it is working well. But after I downloaded MySQL, it reports: Fatal error: Call to undefined function mysql_connect() How can I fix this?
It is impossible for both (?=foo) and (?=baz) to match at the same time. It would require the next character to be both f and b simultaneously which is impossible. Perhaps you want this instead: This says that foo must appear anywhere and baz must appear anywhere, not necessarily in that order and possibly overlapping (although overlapping is not possible in this specific case because the letters … Read more
Try using the subset function. This site provides a good reference: HowtoInR
I think you’re missing your routes, you need to define at least one route for example ‘/’ to index. e.g.
The 500 code would normally indicate an error on the server, not anything with your code. Some thoughts Talk to the server developer for more info. You can’t get more info directly. Verify your arguments into the call (values). Look for anything you might think could cause a problem for the server process. The process … Read more
So, you have a com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failurejava.net.ConnectException: Connection refused I’m quoting from this answer which also contains a step-by-step MySQL+JDBC tutorial: If you get a SQLException: Connection refused or Connection timed out or a MySQL specific CommunicationsException: Communications link failure, then it means that the DB isn’t reachable at all. This can have one or more of the following causes: IP … Read more
I have a data frame named “mydata” that looks like this this: I’d like to delete row 2,4,6. For example, like this:
You are better off using a native array instead of an object literal with number-like properties, so that numbering (as well as numerous other array functions) are taken care of off-the-shelf. What you are looking for here is an inline interface definition for your array that defines every element in that array, whether initially present or introduced later: If … Read more