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What is the job_defaults setting in the PYTHON APScheduler library? I don't understand it. I ask the boss to solve the problem.
the settings of the webmaster document are as follows
from pytz import utc
from apscheduler.schedulers.background import BackgroundScheduler
from apscheduler.jobstores.mongodb import MongoDBJobStore
from apscheduler.jobstores.sqlalchemy import SQLAlche...
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Pip installation error Command "python setup.py egg_info"
python3.6 pip 9.0.3 install shapely 1.6.4 error as shown in figure ...
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Could you tell me how to call the program regularly in the Windows py3 environment?
check to see that celery and airflow, do not support Windows in the actual experiment. is there another way to implement this? can only reinstall a linux. ...
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On the question of a dictionary operation in python, separated by condition
the data obtained from the database is such a dictionary
{
q_1 : 9, q_2 : 12, q3 : 22, q4 : 2, q5 : 6,
w_1 : 9, w_2 : 12, w_3 : 22, w_4 : 2, w_5 : 6,
e_1 : 9, e_2 : 12, e_3 : 22, e_4 : 2, e_5 : 6...
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The problem of variable parameters and position parameters of Python 3
def f1(a, b, c=0, *args, **kw):
print( a = , a, b = , b, c = , c, args = , args, kw = , kw)
args = (1, 2, 3, 4)
kw = { d : 99, x : -sharp }
f1(*args, **kw)
the result is a = 1 b = 2 c = 3 args = (4,) kw = { dink: 99...
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How to view the source code of built-in functions in python
for example, how to view the source code of python built-in functions
give an example:
-sharp xrang
for i in xrange(10):
print i
-sharp
-sharp pass
class xrange(object):
"""
xrange(stop) -> xrange object
xrange(star...
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Python has a large list, and now I want to remove the value from the list while taking the value from the list
this big list data adds 100w pieces of data, take 1000 pieces of data from this big list at a time, and delete it from the list at present, my solution is:
a = range(1000000)
b=[]
for i in range(1000):
b.append(a.pop())
feels that this method is ...
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Pymysql inserts a numeric string into the database and does not report an error and does not successfully ask for help.
insert but the data is a number, which is stored in the database as a string, and the corresponding field in the database is also of string type
The python statement goes like this:
sql = insert into uhaoma343 (riqi,uhaoma) values({},{}) .format(r...
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How many data types are there in python3?
there seem to be only six data types in python3 (strings, numbers, lists, dictionaries, tuples, collections), but I recently learned about the chapter on classes. 1 is an "instance " generated by class instantiation a data type? 2 are binary arrays an...
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How to install python3-pip, under Ubuntu how to use the python3? that comes with the system
there is a python3 by default on the machine, but when you install pip3, you install another python3, because you only write scripts in python, so you don t need extra python,. How can you avoid this problem again? ...
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What is a good way to overload operators in python?
I want to overload the multiplication operator of a vector. At the same time, you can calculate the vector vector, and the vector float v is the vector .
def __mul__(v1, v2):
return vec3(v1.e[0]*v2.e[0],v1.e[1]*v2.e[1],v1.e[2]*v2.e[2])
...
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How do I offload the acquired data within the python code?
for example, when I use kafka or rabbitmq to get data from a message queue, the source has only one queue and cannot offload data from the data source. However, it is difficult to calculate, so it is necessary to divert it internally. For example, my me...
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Does Python have a trick to get a statement to execute a specified number of times without having to write a loop statement?
I want to click the mouse to specify the coordinate location and specify the number of times. is there any shortcut? def click (num):
mouseclick(xxx,xxx)
...
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The crawler encounters a parameter case_id, that seems to be encrypted. What should I do?
the crawler encountered an unknown parameter , which is used to request a URL. How to break a URL like:.. talk ExamCaseReportGeneral.jspx?case_id=612e24bf-eae7-4d22-ba4d-9d0169a5a5e6 ...
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How to add python3? to jupyter
since python2, is installed by default in mac, now I want to use python3, , so I installed a python3, prompt Installed kernelspec python3 in usr local share jupyter kernels python3 on the terminal, indicating that the core installation of python3 is...
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How to update python 3.6.1 to 3.6.6 on mac
as the title
I use the mac operating system, and have just come into contact with python . I have installed 3.6.1 before, but now the latest version of 3.6.x is 3.6.6 . I want to upgrade 3.6.1 in the system to 3.6.6 . Can you download and i...
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How to call py files dynamically by Python
< H2 > purpose < H2 >
can dynamically call different py files, pass in parameters and get return parameters. Here is the imaginary implementation.
a.py:
path_file = b.py -sharp py
para_in = 123
para_out = xxx(path_file,para_in) -sharp pat...
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For beginners, use pymysql to query the database. I hope I can get the data according to the field name of the database. For example, how to change r [0] to r ['id']?
users = []
data = {}
for r in results:
user = {}
-sharp user[ select_id ] = r[0]
-sharp user[ media_id ] = r[1]
-sharp user[ user_id ] = r[2]
-sh...
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Dynamically generate 10 pieces of data, each data has two variables, how to achieve?
I want to insert 10 pieces of data into the array
users_values.append((i, 75, 1, x[j] + .mp4 ,
str(uuid.uuid1()) + ".mp4", abc , 2018-08-01 06:21:37 , 2018-08-01 06:21:37 , 0,
0))
10 pieces of da...
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Python3 crawler reported an error: HTTP Error 500: Internal Server Error
A crawler written before has been used for half a year, but it can not be used recently. An error of 500 was reported. The crawled website http: xilin123.cn can open normally.
Open the developer tool and find that Status Code is 500, so it cause...
