如何查找和检查文件中的特定单词然后将其删除

Question

我的文本包含 1234:zakasi:2:1:3 形式的学生数据（学生 id ,name , sem ,yrs , course）

我想首先检查学生 id 是否在文件中，然后删除 id 所在的整行，如果是的话

infile = open("students.dat","r")
f = infile.readlines()
id = input('enter your id:')
new_list = []
for line in f:
    for item in line.split(':'):
    new_list.append(item)
    if id in new_list[0]:
        # delete the line its found in

Answer 1

with open("students.dat","r") as infile:
f = infile.readlines()
student_id = input('enter your id:')
new_list = []
lines_kept = []
for line in f:
    for item in line.split(':'):
    new_list.append(item)
    if student_id in new_list[0]:
        # delete the line its found in
        print("Found instance")
    else:
        lines_kept.append(line)


# Writing part
with open("students.dat","w") as outfile:
    outfile.write("\n".join(lines_kept))