I'm searching for a list of terms in a file. I want to print the line number in the file where the term was found.
This is the code I'm using to find the term:
w = "wordlist.txt" d = "demofile.txt" keys = [key for key in (line.strip().lower() for line in open(w)) if key] with open(d) as f: print("File", w) for line in f: for key in keys: if key in line.lower(): print(key) In this case you could use enumerate, which returns a tuple of an iterator count, and the value for the current iteration in your iterable variable (the filehandle f in this case).
file_to_be_read.txt:
Hello, this is line 0 And this is the second line your_readscript.py:
with open('file_to_be_read.txt', 'r'): for line_no, line in enumerate(f): print(f'{line_no}: {line}') Where line_no now represents the current line number within the body of the for loop, starting at 0.
Output:
0: This is line 0 1: And this is the second line If you want it to start at 1 (or any other integer), you can pass that as argument to the start parameter of enumerate like so:
for line_no, line in enumerate(f, start=1): ... 
enumerate:for lineno, line in enumerate(f):. Keep in mind that this starts numbering from 0.enumerate, to never know about thestartparameter (because I never had to look up the documentation forenumerate).