[英]Search and Replace in a Text File In Flask
I want to search and replace in a text file in flask.我想在烧瓶中的文本文件中搜索和替换。
@app.route('/links', methods=['POST'])
def get_links():
search_line= "blah blah"
try:
for line in fileinput.input(os.path.join(APP_STATIC, u'links.txt')):
x = line.replace(search_line,
search_line + "\n" + request.form.get(u'query'))
except BaseException as e:
print e
return render_template('index.html')
This code always deletes all lines in my txt file.此代码始终删除我的 txt 文件中的所有行。 And I have unicode and "input() already active" erros.
而且我有 unicode 和“input() 已经处于活动状态”错误。
Is this a correct way to do this?这是执行此操作的正确方法吗? I have to work with python 2.6
我必须使用 python 2.6
Your code will always delete all lines since you are not writing lines back to files in both case ie when search_line is present and when search_line is not present.您的代码将始终删除所有行,因为在这两种情况下,即当存在 search_line 和不存在 search_line 时,您都不会将行写回文件。
Please check the below code with comments inline.请检查以下带有注释的代码。
@app.route('/links', methods=['POST'])
def get_links():
search_line= "blah blah"
try:
for line in fileinput.input(os.path.join(APP_STATIC, u'links.txt'),inplace=1):
#Search line
if search_line in line:
#If yes Modify it
x = line.replace(search_line,search_line + "\n" + request.form.get(u'query'))
#Write to file
print (x)
else:
#Write as it is
print (x)
except BaseException as e:
print e
return render_template('index.html')
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