原創鏈接：暫未找到
轉載鏈接：Python 方法中變量加self和不加的區別
這段代碼我覺得很好的說明了python中類的方法在加self和不加self的區別。
1 >>> class AAA(object): 2 ... def go(self): 3 ... self.one = 'hello' 4 ... 5 >>> class BBB(object): 6 ... def go(self): 7 ... one = 'hello' 8 ... 9 >>> a1 = AAA() 10 >>> a1.go() 11 >>> a1.one 12 'hello' 13 >>> a2 = AAA() 14 >>> a2.one 15 Traceback (most recent call last): 16 File "<stdin>", line 1, in <module> 17 AttributeError: 'AAA' object has no attribute 'one' 18 >>> a2.go() 19 >>> a2.one 20 'hello' 21 >>> b1 = BBB() 22 >>> b1.go() 23 >>> b1.one 24 Traceback (most recent call last): 25 File "<stdin>", line 1, in <module> 26 AttributeError: 'BBB' object has no attribute 'one' 27 >>> BBB.one 28 Traceback (most recent call last): 29 File "<stdin>", line 1, in <module> 30 AttributeError: type object 'BBB' has no attribute 'one' 31 >>> class BBB(object): 32 ... def go(self): 33 ... one = 'hello' 34 ... print one 35 ... self.another = one 36 ... 37 >>> b2 = BBB() 38 >>> b2.go() 39 hello 40 >>> b2.another 41 'hello' 42 >>> b2.one 43 Traceback (most recent call last): 44 File "<stdin>", line 1, in <module> 45 AttributeError: 'BBB' object has no attribute 'one'
類本身的局部變量（個人的認為定義在方法以外不以self開頭的變量是類本身的局部變量）是可以被直接掉用的，注意這里不是指上面所說的方法內的局部變量（這兩個命名空間不同）。如果方法中有有變量與類的局部變量同名，那么方法中的局部變量將會屏蔽類中的局部變量即類中的局部變量不在起作用。