Python 替换textfile中列表中的文本

我目前正在做一项任务，我必须做一个公寓登记程序。我将公寓信息保存在一个文本文件中，如下所示：

['B01','3','Master: TP_1','TP_2','TP_3']
['B02','2','Master: TP_1','TP_2','TP_3']
['B03','1','Master: TP_1','TP_2','TP_3']
['B04','0','Master: TP_1','TP_2','TP_3']
['B05','1','Master: TP_1','TP_2','TP_3']
['B06','2','Master: TP_1','TP_2','TP_3']
['B07','3','Master: TP_1','TP_2','TP_3']
['B08','2','Master: TP_1','TP_2','TP_3']
['B09','1','Master: TP_1','TP_2','TP_3']
['B10','0','Master: TP_1','TP_2','TP_3']

现在，每当一个新学生注册到公寓，我想在居住人数上加1，这是列表中的第二个值。我还想用学生ID号替换TP

def apartmentRegister(): #REGISTERING APARTMENT
    AorB=input("Would you like to register into Apartment A or B? (A/B)")
    if AorB==("A") or AorB==("a"):
        room=input("Insert room number: ")
        f=open("Apartment_A.txt", "r")
        for line in f.readlines():
            if not line or line =="\n":
                continue
            A_register=literal_eval(line)
            if A_register[-5]==(room):
                if A_register[-3]==("TP_1"):
                    f=open("Apartment_A.txt", "a")
                    TPagain=input("Please input your TP number: ")
                    new=line.replace("TP_1",TPagain)
                    f.write(new+"\n")
                    print("You're all set")
                f.close()
    elif AorB==("B") or AorB==("b"):
        room=input("Insert room number: ")
        g=open("Apartment_B.txt", "r")
        for line in g.readlines():
            if not line or line =="\n":
                continue
            B_register=literal_eval(line)
            if B_register[-5]==(room):
                if B_register[-3]==("Master: TP_1"):
                    g=open("Apartment_B.txt", "a")
                    TPagain=input("Please input your TP number: ")
                    new=line.replace("TP_1",TPagain)
                    g.write(new+"\n")
                    print("You're all set")
                g.close()

---

整个代码工作正常。。。只是我无法替换我要替换的值/文本。。。相反，它会在文本文件中添加一行新内容。

您可能需要以下内容：

# This is the content of the file after processing
new_contents_A = []

# Read in all lines and save them to the list
with open("Apartment_A.txt", "r") as f:
    for line in f.readlines():
        if not line or line =="\n":
            new_contents_A.append(line)
            continue
        A_register=literal_eval(line)
        if A_register[-5]==room and A_register[-3]==("TP_1"):
            TPagain=input("Please input your TP number: ")
            new=line.replace("TP_1",TPagain)
            new_contents_A.append(new)
        else:
            new_contents_A.append(line)

# Override the file with the now changed data
with open("Apartment_A.txt", "w") as f:
    for line in new_contents_A:
        f.write(line)

---

您可以使用

open（filename，“a”）

打开文件，其中

a

表示结尾处的

append（请参阅）。您更希望打开它，读取所有行，相应地更改行，然后保存覆盖整个文件的所有行。我先用“r”打开，然后用“a”，这就是问题所在当你打开文件时，你应该检查
r
、
a
或
w
所做的事情。除了代码中的错误，干净的方法是使用CSV文件或小型数据库。