In short, each line represents a row in a database ... Now you know how to write to a file in Python regardless of the type of file! Of course, some files are going to contain more complex ...

The problem I've noticed is that if I append the file with each of the 100k runs (one at a time), it can happen that two threads try to save to the file at the same time and some row(s) end up empty.

So I have a program in Python for use ... 0') by os.write() and nothing is written past that. This becomes apparent when reading from /dev/zero and writing to a file -- the file never grows ...

Write mode creates a file. Reading the file once it’s opened is done using the read() and readlines() function in Python. The read function returns ... Also From the output you see “\n” this indicates ...