class study

Author: CoderHuo

spy/spy/spiders/example.json

@@ -1,7 +1,7 @@
 # -*- coding: utf-8 -*-
 
 from spy.items import SpyItem
-from scrapy import Spider
+from scrapy import Spider, Request
 from scrapy.utils.response import get_base_url
 from urllib.parse import urljoin
 
@@ -11,6 +11,10 @@ class ExampleSpider(Spider):
     allowed_domains = ['tencent.com']
     start_urls = ['http://hr.tencent.com/position.php']
 
+    def start_requests(self):
+        for url in self.start_urls:
+            yield Request(url=url, callback=self.parse)
+
     def parse(self, response):
         base_url = get_base_url(response)
         sites_even = response.css('tr.even')

spy/spy/spiders/example.py

@@ -1,5 +1,7 @@
 #!/usr/bin/env python3
 # -*- coding: utf-8 -*-
+import os
+
 __author__ = 'Mr.Huo'
 
 
@@ -9,7 +11,8 @@ def __init__(self, path=''):
 
     def __getattr__(self, path):
         # print(path)
-        return Chain('%s/%s' % (self._path, path))
+        self._path = '%s/%s' % (self._path, path)
+        return self
 
     def __str__(self):
         return self._path
@@ -18,12 +21,13 @@ def __str__(self):
 
     # 任何类，只需要定义一个__call__()方法，就可以直接对实例进行调用
     def __call__(self, item):
-        return Chain('%s:%s' % (self._path, item))
+        self._path = '%s:%s' % (self._path, item)
+        return self
 
 
 def main():
-    print(Chain('home').status.user.timeline.list)
-    print(Chain('home').status.user('Huo').timeline.list)
+    print(id(Chain('home').status.user.timeline.list),Chain('home').status.user.timeline.list)
+    print(id(Chain('home').status.user('Huo').timeline.list),Chain('home').status.user('Huo').timeline.list)
     c = Chain('ZhiXuan')
     print(c.status.user.timeline.list)
     print(c('HUO'))
@@ -32,4 +36,4 @@ def main():
 
 
 if __name__ == '__main__':
-    main()
+    main()

studyLib/oop/chain.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+
+__author__ = 'Mr.Huo'
+
+
+class Dog():
+    def __init__(self, name="sun"):
+        self.name = name
+
+    def __getattr__(self, item):
+        print("call on:%s from __getattr__" % (item))
+        if hasattr(self, item):
+            return getattr(self, item)
+        else:
+            print("error")
+            return None
+
+    def __setattr__(self, key, value):
+        print("call on:%s from __setattr__" % (key))
+        return object.__setattr__(self, key, value)
+        pass
+
+    #def __getattribute__(self, item):
+    #    print("call on:%s from __getattribute__" % (item))
+    #    return object.__getattribute__(self, item)
+
+
+def main():
+    dog = Dog("dog")
+    print('-' * 30)
+    print(dog.name)
+    #dog.weight = 100
+    print(dog.weight)
+    pass
+
+
+if __name__ == '__main__':
+    main()

studyLib/oop/get_set_attr.py

@@ -6,6 +6,12 @@
 # @property  @XXX.setter 将属性的读取方法变为属性
 
 class Screen():
+    __slots__ = ('_width', '_height')
+
+    def __init__(self, width=None, height=None):
+        self._width = width
+        self._height = height
+
     @property
     def width(self):
         return self._width

studyLib/oop/screen.py

@@ -7,30 +7,32 @@ class Fibonacci(object):
     def __init__(self, name='Fibonacci'):
         self.name = name
         self.a, self.b = 0, 1
+        self.list = []
         print('Init Class %s' % self.name)
 
     # __str__用于print()
     def __str__(self):
-        '''用于print()'''
+        """用于print()"""
         return self.name
 
     # __repr__()返回程序开发者看到的字符串，也就是说，__repr__()是为调试服务的
     __repr__ = __str__
 
     # __iter__()返回迭代对象, 同__next__()做迭代使用
     def __iter__(self):
-        print("[*]when self.a=%d,self.b=%d,__iter__ is called\n " % (self.a, self.b))
+        print("[*]when self.a=%d,self.b=%d,__iter__ is called!" % (self.a, self.b))
         return self
 
-    def __next__(self):
+    def __next__(self, stop=1000):
         self.a, self.b = self.b, self.a + self.b
-        if self.a > 100:
+        if self.a > stop:
             raise StopIteration()
+        self.list.append(self.a)
         return self.a
 
     # __getitem__()取下标操作
     def __getitem__(self, item):
-        pass
+        return self.list[item]
 
     # __getattr__()方法，动态返回一个属性
     def __getattr__(self, item):
@@ -51,7 +53,11 @@ def main():
         print(x)
     print(fi.test1)
     print(fi.test2(1, 2, name='Huo'))
-    #fi.test3
+    print(fi[::])
+    print(fi.list)
+    for x in fi:
+        print(x)
+    print(fi.list)
 
 
 if __name__ == '__main__':