Rubuta ci gaba don wannan sakin layi - Ya yi aiki a matsayin mai fassara daga Turanci, Faransanci da Yaren mutanen Poland a cikin kwaminisanci Czechoslovakia. Ya kuma wallafa a cikin wallafe-wallafen Samizdat. A lokacin juyin juya halin Velvet na 1989
Petr Janyška ya kasance daga cikin zuciyar ƙungiyar 'yanci na dimokiradiyya Civic Forum. Ya kasance muhimmin adadi a cikin kafa kafafen yada labarai masu zaman kansu a zamanin bayan kwaminisanci. Ya kasance mataimakin babban editan "Respekt" da "Lidové noviny". Tun daga 1995 yana aiki a diflomasiyya, a matsayin Jakadan Faransa, yana yin gwagwarmaya don shigar da Czech zuwa Tarayyar Turai. Ya kuma koyar a Jami'ar Charles a Prague. A cikin 2012 ya zama shugaban Cibiyar Czech a Warsaw.