kindle manager

2020-06-26 11:26:19 +08:00
parent d7672d9380
commit 6eac75b852
28 changed files with 4820 additions and 26731 deletions
--- a/mtable.py
+++ b/mtable.py
@@ -0,0 +1,128 @@
+#########################################################
+## @file   : mtable.py
+## @desc   : pandas is to large,
+##           so i implement a simple table data structure
+##           by my self
+## @create : 2020/06/25
+## @author : Chengan
+## @email  : douboer@gmail.com
+#########################################################
+
+class mTable():
+
+    def __init__(self, data=[], index=[], columns=[]):
+        self._data = data
+        self._index = index 
+        self._columns = columns 
+        self._width = 10
+
+    def dataframe(self, data=[], index=[], columns=[]):
+        self._data = data
+        self._index = index 
+        self._columns = columns 
+
+    def get_iat(self, row: int, column: int):
+        """ just like pandas iat"""
+        return self._data[row][column] if len(self._data)>0 else None
+
+    def get_num_rows(self):
+        return len(self._data) if len(self._data)>0 else 0
+
+    def get_num_columns(self):
+        return len(self._columns) if len(self._columns)>0 else 0
+
+    def reverse(self):
+        self._data.reverse()
+
+    def set_data(self, data=[]):
+        """ get table content"""
+        self._data = data
+
+    def get_data(self):
+        """ get table content"""
+        return self._data
+
+    def get_index(self):
+        """ just like pandas index"""
+        return self._index
+
+    def get_columns(self):
+        """ just like pandas columns"""
+        return self._columns
+
+    def set_repr_width(self, width):
+        self._width = width
+
+    def __repr__(self):
+        """ print table """
+        w = self._width
+        s = ''.ljust(w-1,' ')
+        for c in self._columns: s += c.ljust(w,' ')
+        s += '\n'
+        len_index = len(self._index)
+        for i, r in enumerate(self._data):
+            s += self._index[i].ljust(w,' ') if i<len_index else str(i).ljust(w,' ')
+            for c in r:
+                s += str(c).ljust(w,' ')
+            s += '\n'
+        return s
+
+    def __next__(self):
+        # self.a就是当前要迭代的值
+        result = self.a
+        # 计算斐波那契数列的下一个值，并将a变成原来的b，将b变成下一个值
+        self.a, self.b = self.b, self.a + self.b
+        # 返回当前迭代的值
+        return result
+
+    def __iter__(self):
+        return self
+
+if __name__=='__main__':
+
+    print('\n---------------------')
+    data = [['Ohiox','Ohio','Ohio','Nevada','Nevada'],
+            [2000,2001,2002,2001,2002],
+            [1.5,1.7,3.6,2.4,2.9],
+            [1.5,1.7,3.6,2.4,2.9],
+            ]
+
+    mt = mTable(data,
+            index = ['one', 'two','three','four','five'],
+            columns = ['year','state','pop','debt','xx'])
+
+    print('== frame\n', mt)
+    print('== frame.iat[0, 0]\n', mt.get_iat(0, 0))
+    print('== frame.iat[1, 1]\n', mt.get_iat(1, 1))
+    print('== frame.iat[2, 2]\n', mt.get_iat(2, 2))
+    print('== frame.iat[2, 1]\n', mt.get_iat(2, 1))
+    print('== frame.shape[0]\n', mt.get_num_rows())
+    print('== frame.shape[1]\n', mt.get_num_columns())
+    print('== frame.columns\n', mt.get_columns())
+    print('== frame.index\n', mt.get_index())
+
+    mt = mTable(data,
+            columns = ['year','state','pop','debt','xx'])
+    print('== frame\n', mt)
+    print('== frame.iat[2, 1]\n', mt.get_iat(2, 1))
+    print('== frame.shape[0]\n', mt.get_num_rows())
+    print('== frame.shape[1]\n', mt.get_num_columns())
+    print('== frame.columns\n', mt.get_columns())
+    print('== frame.index\n', mt.get_index())
+
+    mt = mTable(data)
+    mt.set_repr_width(20)
+    print('== frame\n', mt)
+    print('== frame.iat[2, 1]\n', mt.get_iat(2, 1))
+    print('== frame.shape[0]\n', mt.get_num_rows())
+    print('== frame.shape[1]\n', mt.get_num_columns())
+    print('== frame.columns\n', mt.get_columns())
+    print('== frame.index\n', mt.get_index())
+
+    mt = mTable()
+    print('== frame\n', mt)
+    print('== frame.iat[2, 1]\n', mt.get_iat(2, 1))
+    print('== frame.shape[0]\n', mt.get_num_rows())
+    print('== frame.shape[1]\n', mt.get_num_columns())
+    print('== frame.columns\n', mt.get_columns())
+    print('== frame.index\n', mt.get_index())