fList (Python)

import os
import os.path

#Check if the file exists
def exist(path):
    if os.path.isfile(path):
        return True, 'file'
    elif os.path.isdir(path):
        return True, 'dir'
    else:
        return False, ''

#Returns the file's path or name depended on the rValue("name" or "path")
def fPath(path, rValue):
    exists = exist(path)
    if exists[0] and exists[1] == "file":
        slash = 0
        path = list(path)
        for i in range(len(path)):
            if path[i] == '/' or path[i] == '\\':
                slash = i
        if rValue == "path":
            return str(''.join(path[0:slash+1]))
        elif rValue == "name":
            return str(''.join(path[slash+1:len(path)]))
    return ''

#Get list with all lines from file
def fList(path):
    exists = exist(path)
    if exists[0] and exists[1] == "file":
        f = open(path, 'r')
        _list = f.readlines()
        f.close()
        return _list
    return []

#Get specific line from file
def fLine(path, line):
    _list = fList(path)
    if _list[line]:
        return _list[line]
    return ''

#Get all text from file
def fText(path):
    exists = exist(path)
    if exists[0] and exists[1] == "file":
        f = open(path, 'r')
        _str = f.read()
        f.close()
        return _str
    return ''

#Standard write
def fWrite(path, _str):
    exists = exist(path)
    if exists[0] and exists[1] == "file":
        if list(_str)[len(_str)-1] != '\n':
            _str = _str + '\n'
        f = open(path, 'w')
        f.write(_str)
        f.close()

#Standard append
def fAppend(path, _str):
    exists = exist(path)
    if exists[0] and exists[1] == "file":
        if list(_str)[len(_str)-1] != '\n':
            _str = _str + '\n'
        f = open(path, 'a')
        f.write(_str)
        f.close()

#Standard write at top
def fTop(path, _str):
    if list(_str)[len(_str) - 1] != '\n':
        _str = _str + '\n'
    fWrite(path, _str + fText(path))

#Write from list
def fWriteList(path, _list):
    _str = ''
    for line in _list:
        _str = _str + line
    fWrite(path, _str)

#Append from list
def fAppendList(path, _list):
    _str = ''
    for line in _list:
        _str = _str + line
    fAppend(path, _str)

#Write at top from list
def fTopList(path, _list):
    _str = ''
    for line in _list:
        _str = _str + line
    fTop(path, _str)

#Replacing a line in a file
def fReplaceLine(path, line, _str):
    if list(_str)[len(_str) - 1] != '\n':
        _str = _str + '\n'
    _list = fList(path)
    _list[line-1] = _str
    fWriteList(path, _list)