CODE:
import sys
from itertools import islice
from itertools import zip_longest
# Function to split file into smaller files
def split(a, iterable, fillvalue=None):
args = [iter(iterable)] * a
return zip_longest(fillvalue=fillvalue, *args)
#initialising variables for WC
num_lines = 0
num_words = 0
num_chars = 0
# HEAD_TAIL printing
print("\n\nHEAD_TAIL\n\n")
filename = input("Enter name of file: ")
# check for file availability
try:
fptr = open(filename)
fptr.close()
except FileNotFoundError:
sys.exit("File does not exist")
# calculate number of lines, words and characters in a single loop for reusability
with open(filename) as fptr:
for line in fptr:
words = line.split()
num_lines += 1
num_words += len(words)
num_chars += len(line)
# taking input for flag
try:
flag = int(input("Enter flag number (0 for default): "))
if flag < 0:
sys.exit("Entered flag should be >= 0")
except ValueError:
sys.exit("Entered flag is not an integer")
# checking for default flag
if flag == 0:
flag = 10
# printing whole file if file size is lesser than flag*2
if num_lines < (flag * 2):
with open(filename) as fptr:
print ("printing whole file")
print (fptr.read())
# printing only head and tail based on flag size
else:
with open(filename) as fptr:
print("HEAD")
for num, line in enumerate(fptr):
if (num > (flag - 1)):
break
print (line[:-1])
print("TAIL")
for num, line in enumerate(fptr):
if (num + (flag + 1) < num_lines - flag):
continue
print (line[:-1])
# wc
print("\n\nWC\n\n")
# printing WC
print(str(num_lines) + " " + str(num_words) + " " + str(num_chars))
# split
print("\n\nSPLIT\n\n")
# taking input file name
filename = input("Enter name of file to be split: ")
# check for file availability
try:
fptr = open(filename)
fptr.close()
except FileNotFoundError:
sys.exit("File does not exist")
# read flag input
try:
flag = int(input("Enter flag number (0 for default): "))
if flag < 0:
sys.exit("Entered flag should be >= 0")
except ValueError:
sys.exit("Entered flag is not an integer")
# check for default flag
if flag == 0:
flag = 1000
# taking new files name as input
filename_new = input("Enter name of smaller files: ")
temp = 0
# checking for blank name
if filename_new == "":
filename_new = "x"
# opening file and splitting
with open(filename) as fin:
for i, lines in enumerate(split(flag, fin, fillvalue=''), 1):
with open("{0}_{1}.txt".format(filename_new,temp), 'w') as fout:
print("Writing into {0}_{1}.txt".format(filename_new,temp))
fout.writelines(lines)
temp = temp + 1
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