写入时间等于文件文本中的行数

Question

I want to write time in every line in front of Text by check number of line in text file. Because I want to convert this text file to .srt file by this link. https://unix.stackexchange.com/questions/111024/how-to-convert-a-txt-subtitle-file-to-srt-format

Every one line is 1 second.(start first line at 00:00:00:) My file has many line (500-1000 line up) from

.......Text......... (first line)
.......Text......... (second line)
.......Text......... (third line)
    .
    .
    .
.......Text......... (60 line)
.......Text......... (61 line)
    .
    .
.................... (3600 line)

to this

00:00:01:.......Text......... (first line)
00:00:02:.......Text......... (second line)
00:00:03:.......Text......... (third line)
    .
    .
    .
00:01:00:.......Text......... (60 line)
00:01:01:.......Text......... (61 line)
    .
    .
01:00:00:.................... (3600 line)

Now I can check number of line and write text in front of text every line. But error when use code check numberline and open file write text. I don't know how to write for loop and compare number of line. I'm noob for this.

def numberline(fname):
    with open(fname) as f:
           for i, l in enumerate(f):
                  pass
    return i + 1
numberline("/home/pi/gtest.txt")) 

dataFile = open("/home/pi/gtest.txt", "w")
    for line in range(numberline("/home/pi/gtest.txt")):
dataFile.write("00:00:%02d:\n" % line)
    dataFile.close()

Please help me. Thankyou This my project wait for this part because this is last part in python. Normally I use Rpi with linux command but not understand in python.

Answer 1

Try this:

import datetime

str(datetime.timedelta(seconds=666))
result = ''
countTime = 0
for line in open('/home/pi/gtest.txt'):
    result = result + (str(datetime.timedelta(seconds=countTime)) + ":"  + line) + '\n'
    countTime = countTime+1
print (result)

You can then just write the result to the file:

with open('/home/pi/gtest.txt', 'w') as the_file:
    the_file.write(result)

Answer 2

You can use the enumerate() function to get the line number and the line from a file when iterating, and divmod() to divide-and-remainder a number. Here we do it twice, first to get from just seconds (the line number) to minutes and seconds, then from minutes to hours and minutes.

Then, we use regular % interpolation with the %02d specifier to turn the hours/minutes/seconds variables into zero-padded two-character-length strings, and glue them together with colons to the original line.

For added meta points, this script annotates itself by default. :)

To write the output to another file, it's easiest to just do it using the shell:

$ python this-script.py > annotated.txt

This is Python 3, by the way; the print() statement would look different on Python 2.

EDIT: Added argument parsing as per discussion in comments. The script now allows

$ python this-script.py inputfile.txt > annotated.txt

---

import argparse

ap = argparse.ArgumentParser()
ap.add_argument('input', default=__file__)
args = ap.parse_args()

with open(args.input, 'r') as f:
    for line_number, line in enumerate(f):
        minutes, seconds = divmod(line_number, 60)
        hours, minutes = divmod(minutes, 60)
        print('%02d:%02d:%02d:%s' % (hours, minutes, seconds, line), end='')