Question

嗨，将字符串附加到文件中时，我遇到了一个小问题。因此，基本上，我使用以下方法添加文件中不存在的书：

def writeBooks2File(booklist_dir):
    BOOKS = ['Human Philosophy', 'Human Philosophy book']
    for val in BOOKS:
        if val not in open(booklist_dir, "r").read():
            f = open(booklist_dir, "a")
            f.write(val + "\n")
            f.close()

我的文件包含以下内容：

Human Philosophy
Human Philosophy book

可以说我删除了Human Philosophy，该文件仅包含Human Philosophy book。再次运行writeBooks2File(booklist_dir)不会返回以下输出：

Human Philosophy
Human Philosophy book

但是请返回此值：

Human Philosophy book

我需要怎么做才能将Human Philosophy添加到文件中，并且两个值彼此相似。

Answer 1

问题是

>>> 'Human Philosophy' in 'Human Philosophy book\n'
True

因此，您可以执行以下操作：

>>> ('Human Philosophy'+'\n') in 'Human Philosophy book\n'
False

我重写了您的脚本...应该可以更好地使用

def writeBooks2File(booklist_dir,books):
    f = open(booklist_dir, "a")
    for val in books:
        if val+'\n' not in open(booklist_dir, "r").read():

            f.write(val + "\n")
    f.close()

def removebooks(booklist_dir,books):
    with open(booklist_dir, "r") as File:
        all_books = File.read()
    for book in books:
        new = all_books.replace(book+'\n','')
    with open(booklist_dir, "w") as File:
        File.write(new)
books = ['Human Philosophy book','Human Philosophy']        
writeBooks2File('test.txt',books)

remove_books = ['Human Philosophy'] 
removebooks('test.txt',remove_books)

通过此操作，您可以执行无法执行的操作。即使有“人类哲学书”，也要在文件中附加“人类哲学”

将类似的字符串附加到文件

1 个答案: