python-3.6

问题 I am trying to edit the global variables cows and bulls inside a loop but getting this error "SyntaxError: name 'cows' is assigned to before global declaration" import random random_no = random.sample(range(0, 10), 4) cows = 0 bulls = 0 #random_num = ','.join(map(str, random_no)) print(random_no) user_input = input("Guess the no: ") for index, num in enumerate(random_no): global cows, bulls print(index, num) if user_input[index] == num: cows += 1 elif user_input[index] in random_no: bulls +=

问题 I am trying to edit the global variables cows and bulls inside a loop but getting this error "SyntaxError: name 'cows' is assigned to before global declaration" import random random_no = random.sample(range(0, 10), 4) cows = 0 bulls = 0 #random_num = ','.join(map(str, random_no)) print(random_no) user_input = input("Guess the no: ") for index, num in enumerate(random_no): global cows, bulls print(index, num) if user_input[index] == num: cows += 1 elif user_input[index] in random_no: bulls +=

问题 I am trying to create a Docker image. The Dockerfile is the following: # Use the official Python 3.6.5 image FROM python:3.6.5-alpine3.7 # Set the working directory to /app WORKDIR /app # Get the COPY requirements.txt /app RUN pip3 install --no-cache-dir -r requirements.txt # Configuring access to Jupyter RUN mkdir /notebooks RUN jupyter notebook --no-browser --ip 0.0.0.0 --port 8888 /notebooks The requirements.txt file is: jupyter numpy==1.14.3 pandas==0.23.0rc2 scipy==1.0.1 scikit-learn==0

问题 Python 3.6 supports type annotation, like: def foo() -> int: return 42 But what is expected to use when a function hasn't return anything? PEP484 examples mostly use None as a return type, but there is also NoReturn type from typing package. So, the question is what is preferable to use and what is considered a best practice: def foo() -> None: #do smth or from typing import NoReturn def foo() -> NoReturn: #do smth 回答1: NoReturn means the function never returns a value . The function either

问题 I'm getting lots of warnings like this in Python: DeprecationWarning: invalid escape sequence \A orcid_regex = '\A[0-9]{4}-[0-9]{4}-[0-9]{4}-[0-9]{3}[0-9X]\Z' DeprecationWarning: invalid escape sequence \/ AUTH_TOKEN_PATH_PATTERN = '^\/api\/groups' DeprecationWarning: invalid escape sequence \ """ DeprecationWarning: invalid escape sequence \. DOI_PATTERN = re.compile('(https?://(dx\.)?doi\.org/)?10\.[0-9]{4,}[.0-9]*/.*') <unknown>:20: DeprecationWarning: invalid escape sequence \( <unknown>

问题 I am moving my Django code from 2.1.7 directly to the new Django 2.2. The only problem I encountered in my Centos7 development environment was that my local development database (sqlite3) version was incompatible using my Python 3.6.7. The error I was getting from "manage.py runserver" was: django.core.exceptions.ImproperlyConfigured: SQLite 3.8.3 or later I am unable to use another version of Python because this is the maximum supported by AWS elasticbeanstalk. The Python 3.6.7 seems to come

问题 I'm trying to create a derived column based on two conditions being met for values in existing columns. One of the conditions that needs to be met is that that value for one of the columns cannot have a datetime value that is missing (NaT). I keep receiving an attribute error that the Timestamp object has no attribute isnull and I cannot understand how to fix it. I checked that my conditional statement was correct by filtering my DataFrame on the conditions that I'm trying to include and that

问题 i was trying to install a module but each time there is an error like this : Erreur: Odoo Server Error Traceback (most recent call last): File "C:\Program Files (x86)\Odoo 12.0\server\odoo\models.py", line 1126, in _validate_fields check(self) File "c:\program files (x86)\odoo 12.0\server\odoo\addons\base\models\ir_ui_view.py", line 351, in _check_xml self.postprocess_and_fields(view.model, view_doc, view.id) File "c:\program files (x86)\odoo 12.0\server\odoo\addons\base\models\ir_ui_view.py"

问题 When i use pydicom in python3.6, there are some problem: import pydicom import matplotlib.pyplot as plt import os import pylab filePath = "/Users/zhuangrui/Documents/Python/Dicom/dicoms/zhang_bo/0001.dcm" dataSet_1 = pydicom.dcmread(filePath) plt.imshow(dataSet_1.pixel_array) plt.show() here is the problem: How can this problem be solved？ Thank you very much！ 回答1: I've faced with the same problem, after doing some research on the suggested link above. I've managed to solve it by updating to

问题 When i use pydicom in python3.6, there are some problem: import pydicom import matplotlib.pyplot as plt import os import pylab filePath = "/Users/zhuangrui/Documents/Python/Dicom/dicoms/zhang_bo/0001.dcm" dataSet_1 = pydicom.dcmread(filePath) plt.imshow(dataSet_1.pixel_array) plt.show() here is the problem: How can this problem be solved？ Thank you very much！ 回答1: I've faced with the same problem, after doing some research on the suggested link above. I've managed to solve it by updating to