C Linking Error: undefined reference to ‘main’
You should provide output file name after -o option. In your case runexp.o is treated as output file name, not input object file and thus your main function is undefined.
Python open() gives FileNotFoundError/IOError: Errno 2 No such file or directory
Make sure the file exists: use os.listdir() to see the list of files in the current working directory Make sure you’re in the directory you think you’re in with os.getcwd() (if you launch your code from an IDE, you may well be in a different directory) You can then either: Call os.chdir(dir), dir being the … Read more
How to fix “Headers already sent” error in PHP
No output before sending headers! Functions that send/modify HTTP headers must be invoked before any output is made. summary ⇊ Otherwise the call fails: Warning: Cannot modify header information – headers already sent (output started at script:line) Some functions modifying the HTTP header are: header / header_remove session_start / session_regenerate_id setcookie / setrawcookie Output can … Read more
“Series objects are mutable and cannot be hashed” error
I am trying to get the following script to work. The input file consists of 3 columns: gene association type, gene name, and disease name. I keep getting an error that says: Series objects are mutable and cannot be hashed Any help would be dearly appreciated!
Get a substring of a char* [duplicate]
Job done 🙂
How to correct TypeError: Unicode-objects must be encoded before hashing?
It is probably looking for a character encoding from wordlistfile. Or, if you’re working on a line-by-line basis: EDIT Per the comment below and this answer. My answer above assumes that the desired output is a str from the wordlist file. If you are comfortable in working in bytes, then you’re better off using open(wordlist, … Read more
MySQL – Operand should contain 1 column(s)
Your subquery is selecting two columns, while you are using it to project one column (as part of the outer SELECT clause). You can only select one column from such a query in this context. Consider joining to the users table instead; this will give you more flexibility when selecting what columns you want from … Read more
R: numeric ‘envir’ arg not of length one in predict()
There are several problems here: The newdata argument of predict() needs a predictor variable. You should thus pass it values for Coupon, instead of Total, which is the response variable in your model. The predictor variable needs to be passed in as a named column in a data frame, so that predict() knows what the … Read more
Problem HTTP error 403 in Python 3 Web Scraping
This is probably because of mod_security or some similar server security feature which blocks known spider/bot user agents (urllib uses something like python urllib/3.3.0, it’s easily detected). Try setting a known browser user agent with: This works for me. By the way, in your code you are missing the () after .read in the urlopen … Read more
How to fix IndexError: invalid index to scalar variable
You are trying to index into a scalar (non-iterable) value: When you call [y for y in test] you are iterating over the values already, so you get a single value in y. Your code is the same as trying to do the following: I’m not sure what you’re trying to get into your results … Read more