Python 2.7 如何用通配符替换使用python的文件行

我是python新手，正在使用2.7版

我想使用填充该行其余部分的

通配符替换文件中的
字符串。这是我到目前为止所拥有的

这将起作用，并将文件字符串更改为第二个字符串
：

if line == 'This = first string':
    line = 'This = second string'

if line == 'This = *':
    line = 'This = second string'

这将不起作用，文件字符串将保留为第一个字符串

：

if line == 'This = first string':
    line = 'This = second string'

if line == 'This = *':
    line = 'This = second string'

完整脚本：

import sys
import shutil
import os
import re

#Assigns tf as a tmp file with the module for appending and writing, and creating the file if it does not exist.
tf = open('tmp', 'a+')

#Assigns f as test.txt
with open('test1.txt') as f:
#Reads the line in the test1.txt file
    for line in f.readlines():
#Checks for the line condition
        if line == 'This = *':
#Sets the new line condition
            line = 'This = second string'
#Replaces the line withe the new build path
        tf.write(line)
#Closes the test2.txt file
f.close()
tf.close()
#Copies the changes from the tmp file and replaces them into the test2.txt
shutil.copy('tmp', 'test2.txt')
#Removies the tmp file from the computer
os.remove('tmp')

J.F.塞巴斯蒂安的最新代码

test2.txt内容：

blah
This = first string

import os
from tempfile import NamedTemporaryFile

prefix = "This = "
path = 'test2.txt'  
dirpath = os.path.dirname(path)
with open(path) as input_file:
    with open(path+".tmp", mode="w") as tmp_file:
        for line in input_file:
            if line.startswith(prefix):
                line = prefix + "second string\n"
            tmp_file.write(line)
        tmp_file.delete = False
os.remove(path)
os.rename(tmp_file.name, path)

testing2.py内容：

blah
This = first string

import os
from tempfile import NamedTemporaryFile

prefix = "This = "
path = 'test2.txt'  
dirpath = os.path.dirname(path)
with open(path) as input_file:
    with open(path+".tmp", mode="w") as tmp_file:
        for line in input_file:
            if line.startswith(prefix):
                line = prefix + "second string\n"
            tmp_file.write(line)
        tmp_file.delete = False
os.remove(path)
os.rename(tmp_file.name, path)

错误消息：

C:\Users\james>testing2.py
Traceback (most recent call last):
  File "C:\Users\james\testing2.py", line 13, in <module>
    tmp_file.delete = False
AttributeError: 'file' object has no attribute 'delete'

C:\Users\james>testing2.py
回溯（最近一次呼叫最后一次）：
文件“C:\Users\james\testing2.py”，第13行，在
tmp_file.delete=False
AttributeError:“文件”对象没有属性“删除”

---

有什么建议吗？

替换以前缀开头的行：

prefix = "This = "
if line.startswith(prefix):
    line = prefix + "second string"

如果该文件是带有

key=value

行的配置文件，则还可以使用或正则表达式替换该值（在更复杂的情况下）：

替换文件中的行；您可以使用：

---

我终于找到了答案

执行Nightly.py之前的test1.txt：

blah
blah
This is a first string
blah
blah

blah
blah
This is a second string
blah
blah

顺便说一句，使用记事本时，标签会对代码产生影响++

import sys
import os
import re
import shutil

tf = open('tmp', 'a+')

with open('test1.txt') as f:
    for line in f.readlines():
        build = re.sub ('This is.*','This is a second string',line)
        tf.write(build)
tf.close()
f.close()
shutil.copy('tmp', 'test1.txt')
os.remove('tmp')

执行Nightly.py后的test1.txt：

blah
blah
This is a first string
blah
blah

blah
blah
This is a second string
blah
blah

---

我得到一个错误

前缀
或
行
应为缩进块
。我更新了完整的脚本，也许你可以更清楚地了解picture@FiddleFreak：使用完整回溯发布引发错误的代码。检查你是否没有混合制表符和空格。发布它，等待回复…@FiddleFreak:我已经添加了完整的代码示例。仍然不起作用。最后一行出现错误
WindowsError:[错误2]系统找不到指定的文件
您试图修复的
属性错误是什么？您希望
tmp\u file.delete=False
行做什么？为什么在那里？