def get_length_of_missing_array (array_of_arrays): if len(array_of_arrays)==0: return 0 else: lenlist = [len(i) for i in array_of_arrays ] print(lenlist) rangelist=[t for t in range(min(lenlist),max(lenlist)+1)] print(rangelist) ...
suddenly there is an idea that if the field changes are complicated when making a query, you can t write the query statement, just like A.query.filter (name== ds ) is written dead. If I need to dynamically switch query fields, especially when there ...
from MyQR import myqr error Users jiao Desktop qr_generate bin python3.6 Users jiao Desktop qr_generate main.py Traceback (most recent call last): File " Users jiao Desktop qr_generate main.py ", line 4, in < module > from MyQR import myqr Fi...
try to climb the net http: 58.22.3.131:9003 web html index.html?module=zhbb caught this package in devtool, but it s strange that sending post requests using requests used to be 500 and it was a 500 error to right-click on the package to open it o...
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 ...
import MySQLdb conn = MySQLdb.connect( 127.0.0.1 , root , 123456 , test ,charset= utf8 ) -sharp sql = "insert into userinfo(usernamne,pwd) values(%s,%s)" li = [("name1","338"),("name2","313"...
for example, I have a string whose content is: Python has a rich and powerful library. It is often nicknamed glue language and can easily connect modules made in other languages (especially C CPP). A common application scenario is to use Python to qui...
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...
want to achieve selenium login, but how can not navigate to the account password input box, tried a lot of methods did not work. even this iframe is dynamic ...
class Ux(QMainWindow, window.Ui_MainWindow): @pyqtSlot() def do_stop_search(self): pass @pyqtSlot(dict) def do_append_result(self, item): pass def on_btn_search_clicked(self): self.search = SearchThread(s...
this module is used to authenticate users from django.contrib.auth import authenticate A few days ago, you can use user = authenticate (username=username, password=password) to return a user, but today you try to return None . the following proble...
want to put a picture on the web page, which cannot be realized according to the online writing method. Django 2.0 setting is like this . STATIC_URL = static STATIC_ROOT = os.path.join(BASE_DIR, static ) main_html app staticurls main.html ...
The problem originates from the chapter in map reduce in Liao Xuefeng s python tutorial. Use functions and map, to capitalize the first letter of the string in the list , and then return the list . Link the initial code is, for in iteration, and...
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...
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...
question: recently I was learning the perceptron model and wanted to draw the following picture, but found that the + - sign in the following picture could not be drawn. drawing code from elsewhere, where Perceptron is a class implemented i...
1. Recently, I have studied python, again to see the slicing part of Liao Xuefeng s tutorial. I would like to ask how this code realizes that the spaces on both sides are not displayed in the output by slicing . def trim(s): if s[:1] != and ...
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. ...
We know that the collections of the python built-in module has a lot of useful operations. for example: from collections import Counter -sharp -sharp top n user_counter = Counter("abbafafpskaag") print(user_counter.most_common(3)) -sharp[( ...
python converts "3 hours and 10 minutes " to "190 minutes " solution ...
vue-router returns to the previous page: this.$router.go(-1) there are many pages in my project, and the button on each page wants to return to the previous page. Can this function use the navigation guard to write one globally? ...
I can get it by reflection when I write java. I wonder if there are other convenient ways for kotlin. ...
the name of the operator (that is, the name of the recorder) when the employee under the department is added through the department multi-table. existing one one_id tow_idID tow tow_idID name tows_id(IDID) SQL select c.name f...
the problem is shown in figure Why doesn t n start at 2, start at the beginning, and doesn t include the end value? ...
use the icon of the tkinter settings window to report an error -sharptkintericonbitmap from tkinter import * def main(): root = Tk() root.title( Change Logo ) root.geometry( 350x150 ) root.iconbitmap( python.ico ) root.mainlo...