Update yarapython.rst
Update yarapython.rst

There is no fopen() in python. The suggested method is more pythonic.
jpypi/yara,VirusTotal/yara,rednaga/yara,cblichmann/yara,tdr130/yara,tanium/yara,MeteorAdminz/yara,jpypi/yara,wxsBSD/yara,Security513/yara,wxsBSD/yara,plusvic/yara,bmagistro/yara,wxsBSD/yara,VirusTotal/yara,hillu/yara,Security513/yara,msuvajac/yara,beikezcs/yara,rayyang2000/yara,mgoffin/yara,MeteorAdminz/yara,jshufelt/yara,bmagistro/yara,VirusTotal/yara,digideskio/yara,cblichmann/yara,pombredanne/yara,frbapolkosnik/yara,foreni-packages/yara,jshufelt/yara,rednaga/yara,beikezcs/yara,rayyang2000/yara,wxsBSD/yara,kallanreed/yara,smaudet/yara,plusvic/yara,VirusTotal/yara,msuvajac/yara,VirusTotal/yara,hillu/yara,pombredanne/yara,plusvic/yara,tdr130/yara,cblichmann/yara,Security513/yara,smaudet/yara,cblichmann/yara,kallanreed/yara,pombredanne/yara,jpypi/yara,smaudet/yara,neatsun/yara,tanium/yara,frbapolkosnik/yara,tanium/yara,hillu/yara,msuvajac/yara,rayyang2000/yara,hillu/yara,frbapolkosnik/yara,foreni-packages/yara,pombredanne/yara,digideskio/yara,neatsun/yara,mgoffin/yara,hillu/yara,jshufelt/yara,bmagistro/yara,kallanreed/yara,digideskio/yara,rednaga/yara,digideskio/yara,jshufelt/yara,tdr130/yara,mgoffin/yara,pombredanne/yara,smaudet/yara,MeteorAdminz/yara,frbapolkosnik/yara,neatsun/yara,wxsBSD/yara,foreni-packages/yara,cblichmann/yara,plusvic/yara,beikezcs/yara,mgoffin/yara,plusvic/yara