Replace Some Special Character With Newline \n

I have a text file with numbers and symbols, i want to delete some character of them and to put new line. for example the text file is like that: 00004430474314-3','100004430474314

Solution 1:

The re.findall is useless here.

withopen('path/to/file') as infile:
    contents = infile.read()
    contents = contents.replace('-3","', '\n')
    print(contents)

Another problem with your code is that you seem to think that "-3","" is a string containing -3",". This is not the case. Python sees a second " and interprets that as the end of the string. You have a comma right afterward, which makes python consider the second bit as the second parameter to s.replace().

What you really want to do is to tell python that those double quotes are part of the string. You can do this by manually escaping them as follows:

some_string_with_double_quotes = "this is a \"double quote\" within a string"

You can also accomplish the same thing by defining the string with single quotes:

some_string_with_double_quotes = 'this is a "double quote" within a string'

Both types of quotes are equivalent in python and can be used to define strings. This may be weird to you if you come from a language like C++, where single quotes are used for characters, and double quotes are used for strings.

Solution 2:

First I think that the s object is not a string but a list and if you try to make is a string (s=''.join(s) for example) you are going to end with something like this:

0000443047431431000044304743143177980351931000030049294773100006224433874315127544983100003323786067

Where replace() is useless.

I would change your code to the following (tested in python 3.2)

lines = [line.strip() for line inopen('text.txt')]
line=''.join(lines)
cl=line.replace("-3\",\"","\n")
print(cl)