def find(self,sub, start = 0, end = sys.maxsize):
'''S.find(sub [,start [,end]]) -> int
Return the lowest index in S where substring sub is found,
such that sub is contained within S[start:end]. Optional
arguments start and end are interpreted as in slice notation.
Return -1 on failure.
'''
string = self[start:end]
c = 0
# corner cases
if string == '':
return 0 if sub == '' else -1
if sub == '':
return 0
it = StringSearch(sub,string,self._factory.collator)
it.setAttribute(USearchAttribute.OVERLAP,False)
while True:
try:
r = next(it)
match = it.getMatchedText()
if self.__class__(match) == self.__class__(sub):
return start+r
except StopIteration:
return -1
def count(self, sub, start=0, end = sys.maxsize):
'''S.count(sub[, start[, end]]) -> int
Return the number of non-overlapping occurrences of substring sub in
Unicode string S[start:end]. Optional arguments start and end are
interpreted as in slice notation.
'''
string=self[start:end]
c = 0
# corner cases
if string == '':
return 1 if sub == '' else 0
if sub == '':
return len(string)+1
it = StringSearch(sub,string,self._factory.collator)
it.setAttribute(USearchAttribute.OVERLAP,False)
try:
while True:
next(it)
match = it.getMatchedText()
if self.__class__(match) == self.__class__(sub):
c+=1
except StopIteration:
pass
return c
def __contains__(self,other):
'''x.__contains__(y) <==> y in x
'''
if self == '':
return other == ''
if other == '':
return True
it = StringSearch(other,self,self._factory.collator)
while True:
try:
next(it)
match = it.getMatchedText()
if self.__class__(match) == self.__class__(other):
return True
except StopIteration:
return False
def rfind(self, sub ,start = 0 ,end = sys.maxsize):
'''S.rfind(sub [,start [,end]]) -> int
Return the highest index in S where substring sub is found,
such that sub is contained within S[start:end]. Optional
arguments start and end are interpreted as in slice notation.
Return -1 on failure.
'''
string = self[start:end]
# corner cases
if string == '':
return 0 if sub == '' else -1
if sub == '':
return len(string)+start
c = 0
it = StringSearch(sub,self,self._factory.collator)
it.setAttribute(USearchAttribute.OVERLAP,False)
r = it.last()
while r>= 0:
match = it.getMatchedText()
if self.__class__(match) == self.__class__(sub):
return start + r
r = it.preceding(r)
return r