pythonmysql错误处理_Python-MySQL中的错误处理我正在运⾏⼀个基于
python flask的web服务，我想在那⾥执⾏⼀个⼩的
MySQL Query.当我获得SQL查询的有效输⼊时,⼀切都按预期⼯作，我得到了正确的值.但是，如果该值未存储在数据库中，则会收到TypeError
Traceback (most recent call last):
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1836, in __call__
return self.wsgi_app(environ, start_response)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1820, in wsgi_app
response = self.make_response(self.handle_exception(e))
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1403, in handle_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1817, in wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1478, in full_dispatch_request
response = self.make_response(rv)
File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1566, in make_response
raise ValueError('View function did not return a response')
ValueError: View function did not return a response
我试图⾃⼰处理错误处理并将此代码⽤于我的项⽬，但似乎这不能正常⼯作.
#!/usr/bin/python
from flask import Flask, request
import MySQLdb
import json
app = Flask(__name__)
@ute("/get_user", methods=["POST"])
def get_user():
data = json.loads(request.data)
email = data["email"]
sql = "SELECT userid FROM oc_preferences WHERE configkey='email' AND configvalue LIKE '" + email + "%';";
conn = t( host="localhost",
user="root",
passwd="ubuntu",
db="owncloud",
port=3306)
curs = conn.cursor()
try:
user = curs.fetchone()[0]
return user
except MySQLdb.Error, e:
try:
print "MySQL Error [%d]: %s" % (e.args[0], e.args[1])
return None
except IndexError:
print "MySQL Error: %s" % str(e)
return None
except TypeError, e:
print(e)
return None
except ValueError, e:
print(e)
return None
finally:
curs.close()
conn.close()
if __name__ == "__main__":
app.run(host="0.0.0.0", port=5000, debug=True)
基本上我只想返回⼀个值，当⼀切正常⼯作时我想要什么都不返回，如果它不是最好在我的服务器上有错误消息.如何以正确的⽅式使⽤错误处理？
python新手代码userid
编辑更新了当前代码错误消息.

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