python 字符串分割

#单字符分割
def division(text,strip):
    # 保留分割符 分隔符后换行
    print('# 保留分割符 分隔符后换行')
    list = []
    str = ''
    for i in text:
        if i in strip:
            str = '%s%s' % (str, i)
            list.append(str)
            str = ''
        else:
            str = '%s%s'%(str,i)
    if str != '':
        list.append(str)
    return list
def independent(text,strip):
    # 保留分割符 分隔符单独
    print('# 保留分割符 分隔符单独')
    list = []
    str = ''
    for i in text:
        if i == strip:
            if str != '':
                list.append(str)
                str = ''
            str = '%s%s' % (str, i)
            list.append(str)
            str = ''
        else:
            str = '%s%s'%(str,i)
    if str != '':
        list.append(str)
    return list
def independent1(text,strip):
    # 不保留分隔符 分隔符处换行
    print('# 不保留分隔符 分隔符处换行')
    list = []
    str = ''
    for i in text:
        if i == strip:
            if str != '':
                list.append(str)
                str = ''
        else:
            str = '%s%s'%(str,i)
    if str != '':
        list.append(str)
    return list
# 保留分割符 分隔符后换行 分隔符单独
# 不保留分隔符 分隔符处换行
text = open('text.txt','r',encoding='utf-8').read()
strip = '\n'
d = independent1(text,strip)
print(len(d))
for i in d:
    # print(i)
    if '工程概况' in i[0:8]:
        print(i)
# 功能：分割段落
# 缺点：必须是第一个字符开始匹配



class division():
    def __init__(self,text):
        self.text = text
    # 多字符分割
    def cutting(self,i, t):
        data = ['章', '节']
        if t == '第' and self.text[i + 1].isnumeric() == True and self.text[i + 2] in data:
            print('满足', t, self.text[i + 1], self.text[i + 2])
            return True
    def start(self):
        str = ''
        data = []
        text = ''.join(self.text)
        for i, t in enumerate(text):
            if self.cutting(i, t) == True:
                data.append(str)
                str = ''
                str = '%s' % t
            else:
                str = '%s%s' % (str, t)
        data.append(str)