How to skip comments in a text file?
The initial few lines of the text file that you want to skip are typically comment or some meta data and starts with some special characters like “#”. Here are 3 ways to read a text file line by line Python and skip initial comment lines.
How to avoid lines that begin with comments?
This code doesn’t avoid the lines that begin with comments. Even if I don’t have any comments, dnsmasq tells that there are errors. Its going to be a dnsmasq conf file, and it will read and insert domain names like so: address=\\mydomain.com\\127.0.0.1.
How to skip initial comment lines in Python?
How to skip initial comment lines using if statement A naive way to read a file and skip initial comment lines is to use “if” statement and check if each line starts with the comment character “#”. Python string has a nice method “startswith” to check if a string, in this case a line, starts with specific characters.
Is there a way to read a file line by line?
However, does not reads more than one line, even if n exceeds the length of the line. It will be efficient when reading a large file because instead of fetching all the data in one go, it fetches line by line. readline () returns the next line of the file which contains a newline character in the end.
How to skip lines in a text file?
The second approach to skip lines while reading a text file is efficient, but still bit clunky and a bit of a hack. However, the third approach, which uses itertools’ dropwhile to skip lines while reading a file line by line is efficient and elegant. 1. How to skip initial comment lines using if statement
How to skip comment lines in pandas.read _ CSV?
See the documentation on read_csv: http://pandas.pydata.org/pandas-docs/stable/generated/pandas.read_csv.html This seems to be the case in 0.12.0, I’ve filed a bug report. As Viktor points out you can use dropna to remove the NaN after the fact… (there is a recent open issue to have commented lines be ignored completely):