newly cute, I was confused when I first learned multithreading and queuing. I don"t know what"s the use in practice?
newly cute, I was confused when I first learned multithreading and queuing. I don"t know what"s the use in practice?
I use pyinstaller to package the environment is python2.7.11,pyinstaller 3.3.1. there are only these two py files manage_utils.py mainform.py.,pyinstaller -F mainform.py, , how did this happen? And the path of program execution seems to have chang...
recently, it often appears when using sqlalchemy+python+gunicorn to develop a small project. Sqlalchemy reads the data and returns None, but it is possible to view the data in the database. As a novice, I suspect that there is something wrong with my wr...
I just started to learn python2.7, compared to the examples in the book, but when I write here, I always report grammatical errors. looked at it, and searched the Internet, but didn t find out where the mistake was. this is the source code: class U...
a = { name : zzzz } a.name = yuioi error a [ name ] = asdasd Why ". " Operation will report an error ...
use react + Flask to build a small website, generally read "in-depth understanding of Flask ". after using react, the backend template jinja and routing no longer need to be learned? ...
for example, I now have a variable: num=5 then I need to fill in the value of this num to the position of the underscore in "x0_ ". How can I do that? try 1: x codeshelper id=0 0% s% (5) so the x is " x05 " instead of "x05 " ...
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...
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 ...
A model has data A1 B model has data b1 b1.key1 is a foreign key, associated with the primary key of a1.id is there a problem for me to delete A1 data directly now? db.session.delete (A1) db.session.commit () ...
Test a login and logout. I already instantiated a webdriver, when I logged in. I want to reference this driver. in the logout case. How can I refer to this driver? Why should I refer to the driver, in the login case instead of instantiating another dr...
develop an automated test case of the system in a page-oriented development mode; the existing login login_case, will develop a logout_case. because the prerequisite for logout_case is that the user has logged in, you must first call login_case in the...
class A (): def __init__(self): print( A ) class B (A): def __init__(self): super(B, self).__init__() b = B () * * an error occurred when executing under py2 super (B, self). _ init__ () TypeError: must be type, not classobj** there...
Is the type function in Python a factory function? is the same type of data a singleton? the code is shown in the following figure: >>> f1 = 1 >>> f2 = 2 >>> type(f1) is type(f2) True the reference of type (F1) type (f2) ...
The code iterates one line at a time, expecting the tell method to return the position of the current pointer. But what is actually returned is the last location of the entire document; Please help me to see what the problem is? My Daily.txt Good mo...
want to use python to open a web page, log in to the system, extract cookie and other operations, because that system is very painful, so the implementation of bag-grabbing simulation has been given up. now we have realized the function of extracting ...
how to get the text value of the elements in the following figure-- Operation Plan Application ...
Python 2.7.12, elasticsearch 6.2.0 elasticsearch-dsl 6.1.0 from elasticsearch_dsl import InnerObjectWrapper Traceback (most recent call last): File "<stdin>", line 1, in <module> ImportError: cannot import name InnerObjectWrap...
problem description when using python-ldap, there is a problem that you need to modify ou. Looking at the official python-ldap documentation, you can find that the function of rename_s () can solve this problem, but the ldap version used on the server...
novice to python, enter the specified directory to execute a command see a solution. What I understand is that the semicolon is preceded by entering the folder, followed by the execution of the command, but executed in windows import os os.system(...
OpenWRT joins the python2.7.9, result to report an error, lacks the module, but how to solve? Python build finished, but the necessary bits to build these modules were not found: _bsddb _sqlite3 _tkinter bsddb185 ...