在程序的某个时刻，我要求它接受用户的文本输入并根据它的逗号分隔文本，然后我再次",".join 它到一个 txt 文件中。这个想法是有一个包含所有逗号分隔信息的列表。
问题是，显然，当我 ",".join 它时，它用逗号分隔每个字符，所以如果我有字符串 info1,info2 它分开，得到 info1 | info2，但是，当再次加入它时，它以 i,n,f,o,1,,,i,n,f,o,2, 结尾，这是非常不舒服的，因为它从 txt 文件中获取文本，以便稍后在程序中将其显示给用户。谁能帮我解决这个问题？
categories = open('c:/digitalLibrary/' + connectedUser + '/category.txt', 'a')
categories.write(BookCategory + '\n')
categories.close()
categories = open('c:/digitalLibrary/' + connectedUser + '/category.txt', 'r')
categoryList = categories.readlines()
categories.close()
for category in BookCategory.split(','):
for readCategory in lastReadCategoriesList:
if readCategory.split(',')[0] == category.strip():
count = int(readCategory.split(',')[1])
count += 1
i = lastReadCategoriesList.index(readCategory)
lastReadCategoriesList[i] = category.strip() + "," + str(count).strip()
isThere = True
if not isThere:
lastReadCategoriesList.append(category.strip() + ",1")
isThere = False
lastReadCategories = open('c:/digitalLibrary/' + connectedUser + '/lastReadCategories.txt', 'w')
for category in lastReadCategoriesList:
if category.split(',')[0] != "" and category != "":
lastReadCategories.write(category + '\n')
lastReadCategories.close()
global finalList
finalList.append({"Title":BookTitle + '\n', "Author":AuthorName + '\n', "Borrowed":IsBorrowed + '\n', "Read":readList[len(readList)-1], "BeingRead":readingList[len(readingList)-1], "Category":BookCategory + '\n', "Collection":BookCollection + '\n', "Comments":BookComments + '\n'})
finalList = sorted(finalList, key=itemgetter('Title'))
for i in range(len(finalList)):
categoryList[i] = finalList[i]["Category"]
toAppend = (str(i + 1) + ".").ljust(7) + finalList[i]['Title'].strip()
s.append(toAppend)
categories = open('c:/digitalLibrary/' + connectedUser + '/category.txt', 'w')
for i in range(len(categoryList)):
categories.write(",".join(categoryList[i]))
categories.close()
请您参考如下方法:
您应该传递 ''.join() 一个列表，而不是传递一个字符串。
字符串也是序列，因此 ''.join() 将每个字符视为一个单独的元素:
>>> ','.join('Hello world')
'H,e,l,l,o, ,w,o,r,l,d'
>>> ','.join(['Hello', 'world'])
'Hello,world'
