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Python installation error, update machine required
the newly installed win7 system, Ann python is, the installation package setup comes out of this, which I have encountered before. I forgot how to solve it. ...
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Python3 encountered an error while accessing the asp page using requests.
the official WeChat of the school has an one-click function to check grades, and I have always wanted to be able to do it. Now I am learning python, and I am going to use it to practice, but I made a 500th error during the interview.
here is the code:...
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What is the difference between the two built-in functions exec and eval in python3?
there are two built-in functions that have very similar functional descriptions:
>>> help(exec)
Help on built-in function exec in module builtins:
exec(source, globals=None, locals=None, )
Execute the given source in the context of globa...
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Invalid Python requests agent
use the requests proxy module and do not change the ip address after success
< hr >
Code:
import requests
from bs4 import BeautifulSoup
url=r http: ip.chinaz.com
proxy={ http : http: 177.130.55.164:20183 ,
https : https: 177.1...
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How to implement top n problem with JavaScript? For example, most_common () of python
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[( ...
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How does Python handle the English question mark in the file path gracefully?
error "Invalid argument " is reported when there is an English question mark in the path of the parameter file when using the open function of python
asked on stackoverflow, and a boss told me, "Install linux.. " Or something else that isn t Windo...
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Ask the question of introducing the module into python
The code structure of the project is as follows: main.py is the main program, and the method in file01.py under module is introduced, but because the method in file02.py is also introduced in file01.py, the method of file02.py will not be found during ...
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About syntax errors in python3.7!
I display such an error after executing according to the following code. class Game (object):
top_score = 0
@staticmethod
def __init__(self, player_name):
self.player_name = player_name
@staticmethod
def show_help():
print(":")
@...
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How to use python to form nested json data?
problem description
Fields of the database:
uid, year, quarter, score
1 2018 4
1 2018 3
1 2018 3
2 2017 5
credits are counted on a quarterly basis, so points for a quarter need to be summed up. ...
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What are the questions about the usefulness of pass statements in python3?
A novice learner python, would like to ask about the use of the pass statement here. the last one below is an example on Mr. Liao Xuefeng s website. what is the purpose of the pass statement? Deleting pass and leaving pass seems to have no effect on t...
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Error not all arguments converted when inserting data into mysql in batch using python
I can insert data into the mysql database with this command
insert into moderation_task(id, media_id, user_id, media_url_or_path, media_title, media_source,
created, updated, status, is_del) values(105, 75, 1,
audit_source origin...
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How does the Python module socket stop when it receives empty data?
< H2 > question < H2 >
Python s module socket uses ecv () to constantly listen to the request data sent by the client, including the empty string bounded . How to identify the empty request and block it?
< H2 > Source code < H2 >
Server side:...
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May I ask the question about the operation of apply_async to the file?
Hello, I want to use multiprocessing to operate on a file, but it didn t achieve the desired results. The code is as follows. After the file stream is passed in, the child process does not run, and there is no printout. How to solve this problem?
< hr...
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What methods does python have to deal with a large number of file downloads?
there are hundreds of files. But none of them are big, and the largest ones are only a few megabytes .
I use pycurl to download.
I put the download address on the list.
take out the first download, wait for it, and then take the second one.
but t...
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How can python write to a file without line wrapping?
tgcode ="dafafadfaf"
result = "window.config = %s ;" % (tgcode)
print(result)
f.write(result, )
python window.config = dafafadfaf ;
window.config = dafafadfaf
;
" ,
def modify_text_folder(tgcode):
CONFI...
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Can I pass a variable to the decorator in python?
is that the A function uses the decorator, and the variable var inside the A function is passed to the decorator, and then it is checked and so on, okay? ...
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After the self-built sentry, you have configured the mail service, but you still can't get the verification email?
problem description
I have configured the mail server in config.yml
mail.backend: smtp -sharp Use dummy if you want to disable email entirely
mail.host: smtp.exmail.qq.com
mail.port: 587
mail.username:
mail.password:
mail.use-tls: ...
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Simple combinatorial problem, disordered pair
topic description
Mathematical Combinatorial problems
sources of topics and their own ideas
competitive programs
what result do you expect? What is the error message actually seen?
I tried a way to solve this problem in O (n). But get the wron...
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Python sqlalchemy operation mysql error, Truncated incorrect DOUBLE value?
sqlalchemy operation data Times error:
Warning: (1292, "Truncated incorrect DOUBLE value: weixincode ")
result = self._query(query)
but the data is inserted. Why?
the source code is as follows:
@staticmethod
def create_account(area_c...
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Python3.7 pip installation class library error: ssl module in Python is not available
[root@10-23-67-69 Python-3.7.0]-sharp python3
Python 3.4.8 (default, Apr 9 2018, 11:43:18)
[GCC 4.4.7 20120313 (Red Hat 4.4.7-18)] on linux
Type "help", "copyright", "credits" or "license" for more information.
&g...
