Merge pull request #90 from quanxing/master

修改了delete方法和插入方法

python/05_array/myarray.py

@@ -9,35 +9,53 @@ class MyArray:
     """A simple wrapper around List.
     You cannot have -1 in the array.
     """
+
     def __init__(self, capacity: int):
+
         self._data = []
         self._count = 0
         self._capacity = capacity
     
     def __getitem__(self, position: int) -> int:
+
         """Support for subscript.
         Perhaps better than the find() method below.
         """
         return self._data[position]
 
     def find(self, index: int) -> Optional[int]:
+
         if index >= self._count or index <= -self._count: return None
         return self._data[index]
 
     def delete(self, index: int) -> bool:
+        
         if index >= self._count or index <= -self._count: return False
+        
         self._data[index:-1] = self._data[index+1:]
         self._count -= 1
+        # 真正将数据删除并覆盖原来的数据 ，这个需要增加
+        self._data = self._data[0:self._count]
+        print ('delet function',self._data)
         return True
 
     def insert(self, index: int, value: int) -> bool:
-        if index >= self._count or index <= -self._count: return False
+
+        #if index >= self._count or index <= -self._count: return False
         if self._capacity == self._count: return False
-        self._data.insert(index, value)
+        # 如果还有空间，那么插入位置大于当前的元素个数，可以插入最后的位置
+        if index >= self._count:
+            self._data.append(value)
+        # 同上，如果位置小于0 可以插入第０个位置.
+        if index < 0:
+            print (index)
+            self._data.insert(0, value)
+
         self._count += 1
         return True
 
     def insert_to_tail(self, value: int) -> bool:
+
         if self._count == self._capacity: return False
         if self._count == len(self._data):
             self._data.append(value) 
@@ -47,11 +65,13 @@ class MyArray:
         return True
     
     def __repr__(self) -> str:
+
         return " ".join(str(num) for num in self._data[:self._count])
 
     def print_all(self):
+
         for num in self._data[:self._count]:
-            print(f"{num}", end=" ")
+            print("{num}", end=" ")
         print("\n", flush=True)
 
 if __name__ == "__main__":
@@ -59,7 +79,10 @@ if __name__ == "__main__":
     for i in range(6):
         a.insert_to_tail(i)
     
-    a.delete(2)
-    print(a)
-    a.insert_to_tail(7)
-    print(a)
+    print('origin',a)
+    a.delete(4)
+    print ('delete ',a)
+
+    a.insert(100,10000)
+    print (a)
+