在python中使用多線程測量執行時間

Question

from flask import Flask
from flask import request
import threading
import time
from pymongo import MongoClient
import gridfs
bridgeVideoDatabase = MongoClient().bridgeVideoDatabase
fs = gridfs.GridFS(bridgeVideoDatabase)

app = Flask(__name__)

host = '10.0.0.23'
port = 8080

client = MongoClient('mongodb://localhost:27017/')
db = client.bridgeUserInformationTable



@app.route('/sendUserStringIntData',methods=['GET', 'POST'])
def getDataFromAndroid():      
    print "Entire Data:",request.form
    UserName = request.form['UserName']
    print UserName
    #insertion
    db.bridgeUsersInfo.insert({"UserName":UserName})
    #display in console
    cursor = db.bridgeUsersInfo.find()
    for document in cursor:
        print(document)
    Thread1 = threading.Thread(target=getDataFromAndroid)

    t=time.time()

    Thread1.start()
    Thread1.join()
    print'Total time for execution :',time.time()-t,'msec'
    return "User Info Saved successfully in Database :-)"


if __name__ == '__main__':
    app.run(
        host=host, port=port
        )

以上是用於測量使用python將數據保存到數據庫並從andoid更新輸入的時間的腳本。 雖然運行相同它是托管但保存文本后它給出錯誤如下

       * Running on http://10.0.0.23:8080/ (Press CTRL+C to quit)
[2016-11-11 11:52:22,136] ERROR in app: Exception on /sendUserStringIntData [POST]
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1988, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1641, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1544, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1639, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1625, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
TypeError: getDataFromAndroid() takes exactly 1 argument (0 given)
10.0.0.27 - - [11/Nov/2016 11:52:22] "POST /sendUserStringIntData HTTP/1.1" 500 

應如何解決？

 * Running on http://10.0.0.23:8080/ (Press CTRL+C to quit)
Entire Data: ImmutableMultiDict([('UserName', u'mahaveer'), ('Age', u'0'), ('Password', u'null')])
mahaveer
{u'UserName': u'mahaveer', u'Age': u'24', u'_id': ObjectId('5825950e0f325f3a30ef7292'), u'Password': u'12345'}
{u'UserName': u'mahaveer', u'_id': ObjectId('582595530f325f3a563681c7')}
Entire Data:Exception in thread Thread-1:
Traceback (most recent call last):
  File "/usr/lib/python2.7/threading.py", line 810, in __bootstrap_inner
    self.run()
  File "/usr/lib/python2.7/threading.py", line 763, in run
    self.__target(*self.__args, **self.__kwargs)
  File "/home/cosmitude10/neon/measureMultithread/test.py", line 22, in getDataFromAndroid
    print "Entire Data:",request.form
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 343, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 302, in _get_current_object
    return self.__local()
  File "/usr/local/lib/python2.7/dist-packages/flask/globals.py", line 37, in _lookup_req_object
    raise RuntimeError(_request_ctx_err_msg)
RuntimeError: Working outside of request context.

This typically means that you attempted to use functionality that needed
an active HTTP request.  Consult the documentation on testing for
information about how to avoid this problem.

 Total time for execution : 0.00076699256897 msec
10.0.0.27 - - [11/Nov/2016 15:24:27] "POST /sendUserStringIntData HTTP/1.1" 200 -

Answer 1

therading

threading.Thread(group=None, target=None, name=None, args=(), kwargs={})

args是目標調用的參數元組。 默認為（）

t_args = (1)
assert type(t_args) is tuple, "except tuple, get {0}".format(type(t_args))
>>> AssertionError: except tuple, get <class 'int'>

t_args = (request,)
print type(t_args)
>>> <class 'tuple'>

t= threading.Thread(target=getDataFromAndroid, args=t_args)

元組args =（）/ list args = []
在這里你也可以使用functools中的partial來調用args

class threading.Timer(interval, function, args=[], kwargs={})
threading.Timer(1, partial(your_method, your_arg_a, your_arg_b)).start()

---

有一個名為timeit的內置模塊，

該模塊提供了一種簡單的方法來計算一小段Python代碼。 它既有命令行界面，也有可調用界面。 它避免了許多用於測量執行時間的常見陷阱

import timeit
....
start = timeit.default_timer()
t.start()
t.join()
print timit.default_timer - start