just wondering what's the easiest way to do this.. I have a file with the following contents:
01 04
02 04
04 04
I plan to edit my file to append "missing to the file, since 04 means there are 4 items, but number 3 is missing:
01 04
02 04
#missing
04 04
What is the easiest way to do this? I am pretty sure it's a simple fix, just that I am new to python and I keep trying very long-winded ways to implement this.
Hope to hear something from here, thanks everyone!
with open('path') as f:
for i, line in enumerate(f, start=1):
if int(line.split()[0]) == i:
pass
else:
#put missing
i did't try this code. it's just concept.
Using another file and then replace your file with it.
text = file('file_name','r').read() // read from file
list = '00 00' + [line for line in text]
new_list = []
l=len(list)
for i in xrange(1,l):
new_list+=['missing' for i in range(int(list[i].split()[0])-int(list[i-1].split()[0])+1)]
new_list.append(list[i])
then write new_list to a file then replace your file with this one
Try this:
f = open('file.txt', 'r')
newfile = []
lines = f.readlines()
number = lines[0][-3:-1]
for i in range(int(number)):
string = '0' + str(i+1) + ' ' + number
if i + 1 != int(number):
string += '\n'
if string not in lines:
newfile.append('missing\n')
else:
newfile.append(string)
f.close()
f = open('file.txt', 'w')
f.writelines(newfile)
f.close()
It worked when I tried with your example. It checks if a string is in the file, and writes 'missing' if not.
Note: Not entirely sure if there is a mode for reading and writing (with truncating)
