无法删除列表中的“某些”空项目

Question

我已经编码了一段时间，但最近遇到了一个冲突的问题。由于某些原因，在打印的“第三阶段”中，列表中仍然有空项目。这很奇怪，因为代码的一部分应该删除所有为空的项目，但仍有一些保留。 。 。 。

我发现唯一的问题是包含两个逗号的字符串，它们之间连接了“ ,,”和that，它们不会被删除。

不幸的是，我无法解决此问题，也找不到任何能帮助我解决当前情况的方法。预先感谢您提供的任何帮助！

SpecificPlayerChat = "!get specific player chat log:  ,   ,, ,,, username | category"
#Removing all spaces found within the string
SpecificPlayerChat = SpecificPlayerChat.replace(" ","").strip().replace("\n","")
print("First Stage:", SpecificPlayerChat)

#Store the string username & category data only and split the rest into a "junk" string
junk,SpecificPlayerChatData = SpecificPlayerChat.split(":")
print("Second Stage:", SpecificPlayerChatData)
junk = "" #This string deleted the unwanted string

#Split the usernames and categories into two separate strings
usernames,categories = SpecificPlayerChatData.split("|")
print("Third Stage:", usernames)

#Split the multiple words or "no words" into an item each to be store in a list
usernamelist = []
categorylist = []
usernamelist = usernames.split(",")
categorylist = categories.split(",")

#remove any empty items
print("   Print Empty items:")
for item in usernamelist:
    if item is '':
        usernamelist.remove(item)
        print("     Empty Item Detected!")
print("Third Stage ", usernamelist)

Answer 1

此图片显示吗？

print("     Empty Item Detected!")

尝试此操作而不是删除：

替换为：

for item in usernamelist:
if item is '' or item is null:
    usernamelist.remove(item)
    print("     Empty Item Detected!")

带有此：

for item in usernamelist:
if item is '' or item is null:
    del usernamelist[usernamelist.index(item)]
    print("     Empty Item Detected!")

参考：https://www.w3schools.com/python/ref_keyword_del.asp，https://www.programiz.com/python-programming/methods/list/index