Python-сообщество

 class LinesCompare:
    def __init__(self, file_name):
        self.file_name = file_name
        self.file = None
        self.prev_line = ''
        self.same_lines = {}
    def __iter__(self):
        self.file = open(self.file_name, 'r')
        return self
    def __next__(self):
        try:
            line = next(self.file)
            line = line[:-1]
            if line == self.prev_line:
                self.same_lines[line] += 1
            else:
                self.same_lines = {line: 1}
            self.prev_line = line
        except StopIteration:
            self.file.close()
            self.file = None
            raise
        return self.same_lines
line_compare = LinesCompare(file_name='my_text.txt')
for value in line_compare:
    print(value)

   
d = {}
for i in "abcaddfakdfdalaas;kj;asd":
    d.setdefault(i, 0)
    d[i] += 1
print(d)

 from collections import defaultdict
d = defaultdict(lambda: 0)
for i in "abcaddfakdfdalaas;kj;asd":
    d[i] += 1
print(d)

 class LinesCompare:
    def __init__(self, file_name):
        self.file_name = file_name
        self._account = {}
        with open(self.file_name, 'r') as f:
            for i in f:
                if i in self._account:
                    self._account[i] += 1
                else:
                    self._account.update({i: 1})
        self._keys = list(self._account.keys())
        self._max = len(self._keys)
    def __iter__(self):
        self._num = 0
        return self
    def __next__(self):
        if self._num < self._max:
            result = {self._keys[self._num][:-1]: self._account[self._keys[self._num]]}
            self._num += 1
            return result
        else:
            raise StopIteration

 {'AAAAA': 1}
{'BBBBB': 1}
{'CCCCC': 3}
{'DDDDD': 1}
{'EEEEE': 2}

  
class LinesCompare:
    def __init__(self, file_path):
        self.file_path = file_path
 
    def count_same_lines(self):
        out = {}
        with open(self.file_path, 'r') as f:
            for line in f.read().splitlines():
                out.setdefault(line, 0)
                out[line] += 1
        return out
 
if __name__ == '__main__':
    lc = LinesCompare('my_file.txt')
    res = lc.count_same_lines()
    print(res)