Text14. Дан непустой текстовый файл. Удалить из него последнюю строку.

Решение на Python 3:

# -*- coding: utf-8 -*-
import os
import sys

file1 = "text14.txt"
temp_file = "text14_2.txt"
print("Read from:",file1)
print("Temp file:",temp_file)

try:
    with open(file1, 'r') as infile:
        lines = infile.readlines()
    with open(temp_file, 'w') as outfile:
        for line in lines[:-1:]:
            outfile.write(line)
except IOError:
    print('Open error: ',file1)
                
#sys.exit()

print("Rename {0} to {1}".format(temp_file,file1))
try:
    os.rename(temp_file, file1)
except WindowsError:
    os.remove(file1)
    os.rename(temp_file, file1)
except OSError as e:
    print("Error:", e)