关于rewind和seek

川A2580

#rewind和seek字面意思能看明白，我把有关rewind和seek的命令删去之后，变成了
python ex20.py record1.txt
First let's print the whole file:

kobe
james
harden
Now let's rewind, kind of like a tape.
Let's print three lines:
1

2

3
这两个命令存在时候 是
1 kobe

2 james

3 harden
求解一下


from sys import argv

script, input_file = argv

def print_all(f):
    print(f.read())

def rewind(f):
    f.seek(0)  

def print_a_line(line_count, f):
    print(line_count, f.readline())

current_file = open(input_file)

print("First let's print the whole file:\n")

print_all(current_file)

print("Now let's rewind, kind of like a tape.")

rewind(current_file)

print("Let's print three lines:")

current_line = 1
print_a_line(current_line, current_file)

current_line += 1
print_a_line(current_line, current_file)

current_line += 1
print_a_line(current_line, current_file)

wp231957

看不明白你想问什么或者你想表达什么
难道你是外国人吗，非要用英语去阐述一些事情

川A2580

wp231957 发表于 2021-1-28 07:44
看不明白你想问什么或者你想表达什么
难道你是外国人吗，非要用英语去阐述一些事情

是照着书上打出来的，书是外国人写的