[Python] regex fixed-width positive lookbehinds

trinker

ggplot2orBust
#1
In R (via stringi) I could write (?<=a|bc) but doing this with the re module results in this error:

Code:
    raise error("look-behind requires fixed-width pattern")

error: look-behind requires fixed-width pattern
Is it true that if I have the regex (?<=a|bc) in Python I need to write it as (?<=a)|(?<=bc)?