Situation in Python3 according to the docs: io.open(file, *[options]*) This is an alias for the builtin open() function. and While the builtin open() and the associated io module are the recommended approach for working with encoded text files, this module [i.e. codecs] provides additional utility functions and classes that allow the use of a wider … Read more
A quick Google revealed a thread on Coderanch which was useful. There are several other ways of doing console writing but there seems to be no real benefit of using one or the other apart from less code to write and that the creation of a new PrintWriter object will take up more memory (eventually). … Read more
I think you can try: Stream<String> lines = new BufferedReader(new InputStreamReader(is, cs)).lines();
There are a number of things wrong with your code: char *readFile(char *fileName) { FILE *file; char *code = malloc(1000 * sizeof(char)); file = fopen(fileName, “r”); do { *code++ = (char)fgetc(file); } while(*code != EOF); return code; } What if the file is greater than 1,000 bytes? You are increasing code each time you read … Read more
All monads in Haskell are only monads if you exclude the weird seq combinator. This is also true for IO. Since seq is not actually a regular function but involves magic, you have to exclude it from checking the monad laws for the same reason you have to exclude unsafePerformIO. Using seq you can prove … Read more
Try reading into a buffer and then using the buffer to back two new readers, one for you to use, and one for subsequent consumers to use. For example, imagine that we want to modify the following code: doStuff(r.Body) // r is an http.Request We could do: buf, _ := ioutil.ReadAll(r.Body) rdr1 := ioutil.NopCloser(bytes.NewBuffer(buf)) rdr2 … Read more
You need to use an ifstream if you just want to read (use an ofstream to write, or an fstream for both). To open a file in text mode, do the following: ifstream in(“filename.ext”, ios_base::in); // the in flag is optional To open a file in binary mode, you just need to add the “binary” … Read more
when i write import StringIO it says there is no such module. From What’s New In Python 3.0: The StringIO and cStringIO modules are gone. Instead, import the io module and use io.StringIO or io.BytesIO for text and data respectively. . A possibly useful method of fixing some Python 2 code to also work in … Read more
Assuming no header in the CSV file: import pandas import random n = 1000000 #number of records in file s = 10000 #desired sample size filename = “data.txt” skip = sorted(random.sample(range(n),n-s)) df = pandas.read_csv(filename, skiprows=skip) would be better if read_csv had a keeprows, or if skiprows took a callback func instead of a list. With … Read more
Use System.IO.Directory.CreateDirectory Addtional note: You don’t have to check if it exists first. CreateDirectory will do the right thing regardless.