def correct_first_two_dactyls(self, scansion: str) -> str:
"""
If a hexameter or pentameter starts with spondee,
an unstressed syllable in the third position must actually be stressed,
so we will convert it: - - | U -> - - | -
And/or if the starting pattern is spondee + trochee + stressed, then the unstressed
trochee can be corrected: - - | - u | - -> - - | - -| -
:param scansion:
:return:
>>> print(VerseScanner().correct_first_two_dactyls(
... " - - U U - - U U U U U U - -")) # doctest: +NORMALIZE_WHITESPACE
- - - - - - U U U U U U - -
"""
mark_list = string_utils.mark_list(scansion)
new_line = self.correct_invalid_start(scansion)
raw_scansion = new_line.replace(" ", "")
if raw_scansion.startswith(self.constants.SPONDEE +
self.constants.TROCHEE +
self.constants.STRESSED):
new_scansion = list(self.constants.SPONDEE +
self.constants.SPONDEE +
self.constants.STRESSED + raw_scansion[5:])
corrected = "".join(new_scansion)
new_sequence = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_sequence[mark_list[idx]] = car
return "".join(new_sequence)
return new_line
def correct_invalid_start(self, scansion: str) -> str:
"""
If a hexameter, hendecasyllables, or pentameter scansion starts with spondee,
an unstressed syllable in the third position must actually be stressed,
so we will convert it: - - | U -> - - | -
:param scansion:
:return:
>>> print(VerseScanner().correct_invalid_start(
... " - - U U - - U U U U U U - -").strip())
- - - - - - U U U U U U - -
"""
mark_list = string_utils.mark_list(scansion)
raw_scansion = scansion.replace(" ", "")
if raw_scansion.startswith(self.constants.SPONDEE +
self.constants.UNSTRESSED):
new_scansion = list(self.constants.SPONDEE +
self.constants.SPONDEE + raw_scansion[4:])
corrected = "".join(new_scansion)
new_sequence = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_sequence[mark_list[idx]] = car
return "".join(new_sequence)
return scansion
def correct_invalid_start(self, scansion: str) -> str:
"""
The third syllable of a hendecasyllabic line is long, so we will convert it.
:param scansion: scansion string
:return: scansion string with corrected start
>>> print(HendecasyllableScanner().correct_invalid_start(
... "- U U U U - U - U - U").strip())
- U - U U - U - U - U
"""
mark_list = string_utils.mark_list(scansion)
vals = list(scansion.replace(" ", ""))
corrected = vals[:2] + [self.constants.STRESSED] + vals[3:]
new_line = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_line[mark_list[idx]] = car
return "".join(new_line)
def make_dactyls(self, scansion: str) -> str:
"""
If a pentameter line has 14 syllables, it starts and ends with double dactyls.
:param scansion: a string of scansion patterns
:return: a scansion pattern string starting and ending with double dactyls
>>> print(PentameterScanner().make_dactyls("U U U U U U U U U U U U U U"))
- U U - U U - - U U - U U U
"""
mark_list = string_utils.mark_list(scansion)
vals = list(scansion.replace(" ", ""))
new_vals = self.DACTYLIC_PENTAMETER[:-1] + vals[-1]
corrected = "".join(new_vals)
new_line = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_line[mark_list[idx]] = car
return "".join(new_line)
def make_spondaic(self, scansion: str) -> str:
"""
If a pentameter line has 12 syllables, then it must start with double spondees.
:param scansion: a string of scansion patterns
:return: a scansion pattern string starting with two spondees
>>> print(PentameterScanner().make_spondaic("U U U U U U U U U U U U"))
- - - - - - U U - U U U
"""
mark_list = string_utils.mark_list(scansion)
vals = list(scansion.replace(" ", ""))
new_vals = self.SPONDAIC_PENTAMETER[:-1] + vals[-1]
corrected = "".join(new_vals)
new_line = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_line[mark_list[idx]] = car
return "".join(new_line)
def correct_penultimate_dactyl_chain(self, scansion: str) -> str:
"""
For pentameter the last two feet of the verse are predictable dactyls,
and do not regularly allow substitutions.
:param scansion: scansion line thus far
:return: corrected line of scansion
>>> print(PentameterScanner().correct_penultimate_dactyl_chain(
... "U U U U U U U U U U U U U U"))
U U U U U U U - U U - U U U
"""
mark_list = string_utils.mark_list(scansion)
vals = list(scansion.replace(" ", ""))
n_vals = (vals[:-7] + [self.constants.DACTYL + self.constants.DACTYL] +
[vals[-1]])
corrected = "".join(n_vals)
new_line = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_line[mark_list[idx]] = car
return "".join(new_line)
def correct_antepenult_chain(self, scansion: str) -> str:
"""
For hendecasyllables the last three feet of the verse are predictable
and do not regularly allow substitutions.
:param scansion: scansion line thus far
:return: corrected line of scansion
>>> print(HendecasyllableScanner().correct_antepenult_chain(
... "-U -UU UU UU UX").strip())
-U -UU -U -U -X
"""
mark_list = string_utils.mark_list(scansion)
vals = list(scansion.replace(" ", ""))
new_vals = (vals[:len(vals) - 6] + [
self.constants.TROCHEE + self.constants.TROCHEE +
self.constants.STRESSED
] + vals[-1:])
corrected = "".join(new_vals)
new_line = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_line[mark_list[idx]] = car
return "".join(new_line)
def correct_dactyl_chain(self, scansion: str) -> str:
"""
Three or more unstressed accents in a row is a broken dactyl chain, best detected and
processed backwards.
Since this method takes a Procrustean approach to modifying the scansion pattern,
it is not used by default in the scan method; however, it is available as an optional
keyword parameter, and users looking to further automate the generation of scansion
candidates should consider using this as a fall back.
:param scansion: scansion with broken dactyl chain; inverted amphibrachs not allowed
:return: corrected line of scansion
>>> print(HexameterScanner().correct_dactyl_chain(
... "- U U - - U U - - - U U - x"))
- - - - - U U - - - U U - x
>>> print(HexameterScanner().correct_dactyl_chain(
... "- U U U U - - - - - U U - U")) # doctest: +NORMALIZE_WHITESPACE
- - - U U - - - - - U U - U
"""
mark_list = string_utils.mark_list(scansion)
vals = list(scansion.replace(" ", ""))
# ignore last two positions, save them
feet = [vals.pop(), vals.pop()]
length = len(vals)
idx = length - 1
while idx > 0:
one = vals[idx]
two = vals[idx - 1]
if idx > 1:
three = vals[idx - 2]
else:
three = ""
# Dactyl foot is okay, no corrections
if (one == self.constants.UNSTRESSED
and two == self.constants.UNSTRESSED
and three == self.constants.STRESSED):
feet += [one]
feet += [two]
feet += [three]
idx -= 3
continue
# Spondee foot is okay, no corrections
if one == self.constants.STRESSED and two == self.constants.STRESSED:
feet += [one]
feet += [two]
idx -= 2
continue
# handle "U U U" foot as "- U U"
if (one == self.constants.UNSTRESSED
and two == self.constants.UNSTRESSED
and three == self.constants.UNSTRESSED):
feet += [one]
feet += [two]
feet += [self.constants.STRESSED]
idx -= 3
continue
# handle "U U -" foot as "- -"
if (one == self.constants.STRESSED
and two == self.constants.UNSTRESSED
and three == self.constants.UNSTRESSED):
feet += [self.constants.STRESSED]
feet += [self.constants.STRESSED]
idx -= 2
continue
# handle "- U" foot as "- -"
if one == self.constants.UNSTRESSED and two == self.constants.STRESSED:
feet += [self.constants.STRESSED]
feet += [two]
idx -= 2
continue
corrected = "".join(feet[::-1])
new_line = list(" " * len(scansion))
for idx, car in enumerate(corrected):
new_line[mark_list[idx]] = car
return "".join(new_line)