python - How to split some parts of a line? -

python - How to split some parts of a line? -

so have bunch of lines (productions) either of following:

vbd -> 'rattled' pp -> cc pp|<pp-loc-cc-pp>

there 1 part on lhs , arrow either 1 or 2 parts on rhs. how can store them or phone call them? (for illustration iterating through lines (productions) , check if lhs vbd or rhs rattled (for first pattern) or rhs0 cc , rhs1 pp-pp| (for sec pattern) )?

again, pattern in productions follows 1 of following:

a -> 'b'

or

c -> d e

a, b, c, d , e can (numbers, letters, signs etc.)

if want split each line head (e.g. vbd) , tail (e.g. 'rattled'), 1 easy way utilize split operator so:

for line in lines: split_line = line.split(" -> ") head = split_line[0] tail = split_line[1]

this assumes every single line has 1 incidence of " -> ", , each line has space on each side of "->" separator.

i'm not sure understand specifics of implementation, if wanted check whether given tail 'rattled' or cc pp|<pp-loc-cc-pp>, iterate through tail so:

for token in tail: if token[0] == "'": # string, 'b' else: # d e etc. two_part_style_split = token.split(' ')

two_part_style_split so:

['cc', 'pp<pp-loc-cc-pp>']

python loops split