我正在尝试开发一个函数，该函数将根据用户输入更改脚本中的变量。我开始使用.tell()内置来确定要比较的变量，但是它写入的位置至少偏移了 10 个字节？
#! /usr/bin/env python
import re
class file_input:
def __init__(self):
count = 0
change = raw_input('Input? ')
with open('/home/Downloads/FILES/adobe.py','a+') as f:
for line in f.readlines():
if re.findall('script_data', line):
count += 1
## i put in a count to ignore the first 'script_data' mentioned in the __init__ method ##
if change != line[13:] and count == 2:
## if the user-input is not the same, re-write that variable ##
pos = f.tell()
f.seek(pos)
## i checked the position here and its not where i would think it would be ##
print pos
print 'data not matched up, changing now...'
f.write(change)
print line[13:]
f.close()
if __name__ == '__main__':
file_input()
script_data = 'this is going to be some data...'
当我去检查文件script_data时，即使输入数据不同，变量仍然存在，并且新数据将在下面一行。