<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def fix_file(file_name, line_ranges, options=None, in_place=False, diff=False, verbose=0, cwd=None):
 """Calls fix_code on the source code from the passed in file over the given line_ranges. - If diff then this returns the udiff for the changes, otherwise returns the fixed code. - If in_place the changes are written to the file. """

    import codecs
    from os import getcwd
    from pep8radius.diff import get_diff
    from pep8radius.shell import from_dir

    if cwd is None:
        cwd = getcwd()

    with from_dir(cwd):
        try:
            with codecs.open(file_name, 'r', encoding='utf-8') as f:
                original = f.read()
        except IOError:
            # Most likely the file has been removed.
            # Note: it would be nice if we could raise here, specifically
            # for the case of passing in a diff when in the wrong directory.
            return ''

    fixed = fix_code(original, line_ranges, options, verbose=verbose)

    if in_place:
        with from_dir(cwd):
            with codecs.open(file_name, 'w', encoding='utf-8') as f:
                f.write(fixed)

    return get_diff(original, fixed, file_name) if diff else fixed