text-files

Fastest way to concatenate multiple files column wise - Python

天涯浪子 提交于 2020-12-29 12:34:53
问题 What is the fastest method to concatenate multiple files column wise (within Python)? Assume that I have two files with 1,000,000,000 lines and ~200 UTF8 characters per line. Method 1: Cheating with paste I could concatenate the two files under a linux system by using paste in shell and I could cheat using os.system , i.e.: def concat_files_cheat(file_path, file1, file2, output_path, output): file1 = os.path.join(file_path, file1) file2 = os.path.join(file_path, file2) output = os.path.join

Python MemoryError when trying to load 5GB text file

。_饼干妹妹 提交于 2020-12-13 10:55:48
问题 I want to read data stored in text format in a 5GB file. when I try to read the content of file using this code: file = open('../data/entries_en.txt', 'r') data = file.readlines() an error occurred: data = file.readlines() MemoryError My laptop has 8GB memory and at least 4GB is empty when I want to run the program. but when I monitor the system performance, when python uses about 1.5GB of memory, this error happens. I'm using python 2.7, but if it matters please tell me solution for 2.x and

Cant find the saved data to text file in internal storage, How to save file in internal storage android studio?

拟墨画扇 提交于 2020-12-12 04:04:46
问题 I want to create a text file on my android phone and write some text into it. When I click on the button it says saved to /data/user/0/com.example.savetotextfile/files/example.txt But I can't find these folders. Most apps are in Device storage > Android > data, but the apps that I created myself are not in there. Am I missing a permission? I don't want to write to an sd card. public class MainActivity extends AppCompatActivity { private static final String FILE_NAME = "example.txt"; EditText