'nonetype' object has no attribute 'append'
When doing pan_list.append(p.last) you're doing an inplace operation, that is an operation that modifies the object and returns nothing (i.e. None ). You should do something like this : last_list=[] if p.last_name==None or p.last_name=="": , d.append(i) returns None therefore: d = d.append(i) addigns None to d. replace that line with: d.append(i). The same goes for c = c.append(i)., When doing pan_list.append(p.last) you're doing an inplace operation, that is an operation that modifies the object and returns nothing (i.e. None ). You should do something like this : last_list=[] if p.last_name==None or p.last_name=="": ,Actually you stored None here: append() changes the list in place and returns None item_to_bucket_list_map[i] = (item_to_bucket_list_map.get(i)).append(j). example: In [42]: lis = [1,2,3] In [43]: print lis.append(4) None In [44]: lis Out[44]: [1, 2, 3, 4, Without specifying the second argument, values are None by default. (See dict.fromkeys ) >>> n = 3 >>> count_dict = dict.fromkeys(range(0,n+1)) >>> count_dict 0: None, 1: None, 2: None, 3: None}. In addition to that, values cre,If Block.blockList[best_block].hcell_list is None then using a list method on it will not work. You need to figure out why it has a None value then you can append values to the list, you cannot append anything to a None . This is about all I can say will , You pass in the result of top.append() to your function. top.append() returns None: >>> [].append(0) is None True. You need to call .append() separately, then pass in just top : top.append(listTop[i]) bottom.append(listBottom[i]) foobar(depth+1,, If you use a defaultdict then the append call will work as the value type defaults to a list: In [269]: from collections import defaultdict keys = ['p2p', 'groupchat'] tests_available = ['p2p_1', 'p2p_2', 'p2p_3', , Your build_solution function is, at some point, returning None . Since you set solution to the return of this function, you are setting it to None. I can't be more specific unless you show the code for build_solution ., Python菜鸟出错：AttributeError: 'NoneType' object has no attribute 'append' 5. 具体代码如下：主要是写一个练习程序，我想记录每轮比赛的得分情况from random import choice print 'Baby,choose one direction to shoot!' print 'left,center,right' win=1 lose=0 u_score=
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 'nonetype' object has no attribute 'append' 相關參考資料
'NoneType' object has no attribute 'append' - Stack Overflow
When doing pan_list.append(p.last) you're doing an inplace operation, that is an operation that modifies the object and returns nothing (i.e. None ). You should do something like this : last_list... https://stackoverflow.com 'NoneType' object has no attribute 'append' python - Stack Overflow
d.append(i) returns None therefore: d = d.append(i) addigns None to d. replace that line with: d.append(i). The same goes for c = c.append(i). https://stackoverflow.com appending list but error 'NoneType' object has no attribute 'append'
When doing pan_list.append(p.last) you're doing an inplace operation, that is an operation that modifies the object and returns nothing (i.e. None ). You should do something like this : last_list... https://stackoverflow.com list - Python : AttributeError: 'NoneType' object has no attribute 'append ...
Actually you stored None here: append() changes the list in place and returns None item_to_bucket_list_map[i] = (item_to_bucket_list_map.get(i)).append(j). example: In [42]: lis = [1,2,3] In [43]: pri... https://stackoverflow.com python - Nonetype object has no append attribute append list to ...
Without specifying the second argument, values are None by default. (See dict.fromkeys ) >>> n = 3 >>> count_dict = dict.fromkeys(range(0,n+1)) >>> count_dict 0: None, 1: N... https://stackoverflow.com Python: 'NoneType' object has no attribute 'append' - Stack Overflow
If Block.blockList[best_block].hcell_list is None then using a list method on it will not work. You need to figure out why it has a None value then you can append values to the list, you cannot append... https://stackoverflow.com python - AttributeError: 'NoneType' object has no attribute ...
You pass in the result of top.append() to your function. top.append() returns None: >>> [].append(0) is None True. You need to call .append() separately, then pass in just top : top.append(l... https://stackoverflow.com python - 'NoneType' object has no attribute 'append' - Stack Overflow
If you use a defaultdict then the append call will work as the value type defaults to a list: In [269]: from collections import defaultdict keys = ['p2p', 'groupchat'] tests_available... https://stackoverflow.com 'NoneType' object has no attribute 'append' in python - Stack Overflow
Your build_solution function is, at some point, returning None . Since you set solution to the return of this function, you are setting it to None. I can't be more specific unless you show the co... https://stackoverflow.com Python菜鸟出错：AttributeError: 'NoneType' object has no attribute ...
Python菜鸟出错：AttributeError: 'NoneType' object has no attribute 'append' 5. 具体代码如下：主要是写一个练习程序，我想记录每轮比赛的得分情况from random import choice print 'Baby,choose one direction to shoot!' ... https://zhidao.baidu.com |