Making File Writable and Readable in Python -

i making find , replace script fix stuff on website. using python 3.3.2.

here code:

import re  f = open('random.html', 'w')  strtosearch = " "  line in f:     strtosearch += line  patfinder1 = re.compile('<td>sermon title</td>\             <td><audio preload="none" controls src="http://www.orlandobiblechurch.org/audio/\d{6}ldm.mp3"></audio>\             </td>\         </tr>')  findpat1 = re.search(patfinder1, strtosearch)  findpat1 = re.findall(patfinder1, strtosearch)  in findpat1:     print(i)  subfound = patfinder1.sub('<td>lord\'s day morning</td>\             <td><audio preload="none" controls src="http://www.orlandobiblechurch.org/audio/\d{6}ldm.mp3"></audio>\             </td>\         </tr>', strtosearch) print(subfound)  f.write(subfound) f.close() 

the problem python tells me file not readable. if changes f = open('random.html', 'w') f = open('random.html', 'r') this, says not writable. makes sense why needs both, if put both in, tells me there must 1 read/write thing. positive basic, can't figure out. can provide.

f = open('random.html', 'r+')

source: http://docs.python.org/3/tutorial/inputoutput.html