def filter_string(s, char):
if s == '':
return ''
elif s[0] == char:
return filter_string(s[1:], char)
else:
return s[0] + filter_string(s[1:], char)
text = 'If I look back I am lost'
print(filter_string(text, 'I') # 'f look back am lost'
print(filter_string(text, 'o') # 'If I lk back I am lst'
if s == '':
return ''
elif s[0] == char:
return filter_string(s[1:], char)
else:
return s[0] + filter_string(s[1:], char)
text = 'If I look back I am lost'
print(filter_string(text, 'I') # 'f look back am lost'
print(filter_string(text, 'o') # 'If I lk back I am lst'