所以我有一个with语句的简单例子。它在Python3.8和3.9中工作:
class Foo:
def __enter__(self, *args):
print("enter")
def __exit__(self, *args):
print("exit")
with Foo() as f, Foo() as b:
print("Foo")
产出(如预期):
enter
enter
Foo
exit
exit
但是,如果添加像这样的括号,它只适用于Python3.9:
class
我对manjaro安装进行了一些系统更新,之后在尝试运行gcloud时收到以下错误消息 gcloud components update
Traceback (most recent call last):
File "/home/mani/Downloads/google-cloud-sdk/lib/gcloud.py", line 104, in <module>
main()
File "/home/mani/Downloads/google-cloud-sdk/lib/gcloud.py", line 62, in main
import ssl
ssl._create_default_https_context = ssl._create_unverified_context
from tkinter import *
from pytube import *
##just a title
root =Tk()
root.title('Youtube Downloader')
##label at the top of
ytdLabel= Label(root,text='Enter URL of the video',font=('jost',15))
y
我试图为输出创建一个图表:
import numpy as np
import pandas as pd
import matplotlib.pyplot as plt
import wrapt
from sklearn.model_selection import train_test_split
from keras import models
from keras import layers
from tensorflow.keras.utils import to_categorical
from sklearn.metrics import confusion_matrix
#
我已经看到了一些类似问题的问题,我还没有发现我的代码有什么问题。我正在尝试训练和设置一个基本的Keras模型。我有以下几点: from keras import layers
from keras import models
import pandas as pd
model = models.Sequential()
model.add(layers.Dense(2, activation='relu', input_shape=(2,)))
model.add(layers.Dense(1, activation='relu')) 和一些数据,如下所示:
python3.9.x python3
Python 3.9.2 (default, Mar 12 2021, 04:06:34)
[GCC 10.2.1 20210110] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>>> import pandas
Traceback (most recent call last):
File "<stdin>", l
我正在写一个可以在python3中读取ipsw.me的json的程序: import urrlib.request as ur
url = "https://api.ipsw.me/v4/device/" + device
json_file = ur.urlopen(url)
with open("signedipsw.json",'wb') as output:
output.write(json_file.read())
data = json.load(open("signedipsw.json"))
我正在尝试安装Python3.9,但是Debian附带了3.7。
当我运行sudo apt install python3.9时,我会收到以下消息:
E: Unable to locate package python3.9
E: Couldn't find any package by glob 'python3.9'
E: Couldn't find any package by regex 'python3.9'
当我运行sudo apt install python3时,我得到了这样的信息:
python3 is already the
我当时正在用macOS蒙特利Macbook Pro开发一个M1芯片,并试图在朱庇特笔记本中安装一些软件包。当我试图安装librosa时,收到了以下错误消息:
Collecting librosa
Exception:
Traceback (most recent call last):
File "/Users/tanhaikang/miniforge3/lib/python3.9/site-packages/pip/_internal/cli/base_command.py", line 143, in main
status = self.run(options
使用以下命令安装了solc:
% pip3 install solc-select
Defaulting to user installation because normal site-packages is not writeable
Requirement already satisfied: solc-select in /Users/test2/Library/Python/3.9/lib/python/site-packages (1.0.2)
Requirement already satisfied: pycryptodome>=3.4.6 in /Users/test2
我遇到了一些迁移问题。
我尝试删除我的上一个迁移文件,进入psql,删除所有新表,并删除django_migrations中的特定迁移行。
但是,对于下面的模型,我仍然会得到以下错误:
# my model
class Excerpt(models.Model):
id = models.UUIDField(
default=generate_ulid_as_uuid, primary_key=True, editable=False
)
body = models.JSONField(default=None)
slug = ArrayFiel
我正在尝试使用来自cloud shell的python应用程序构建一个docker镜像。
但我一直在获取The command /bin/sh -c pip install -r requirements.txt' returned a non-zero code: 1,但出现了以下错误:
In file included from /usr/local/include/python3.9/unicodeobject.h:1026,
from /usr/local/include/python3.9/Python.h:97,
我是Python新手。尝试使用此模块
module.py
from sparql import Service
class MyModule:
def my_method(self):
s = Service('https://my-endpoint:8182/sparql', "utf-8", "GET")
statement = """
MOVE uri:temp_graph TO uri:user_graph
ADD uri
我使用brew安装了python3。这是我第一次使用终端,也是第一次使用brew,我不确定哪里出错了。在按照另一个网站上的建议安装后,我使用Pyenv更新了python的版本,并使最新版本成为全局版本。但每次我在终端中输入Python时,它都会显示Python 2.7 % python
WARNING: Python 2.7 is not recommended.
This version is included in macOS for compatibility with legacy software.
Future versions of macOS will not incl
当试图导入某个包时,我得到以下跟踪:
File "/usr/local/lib/python3.9/site-packages/IPython/core/interactiveshell.py", line 3441, in run_code
exec(code_obj, self.user_global_ns, self.user_ns)
File "<ipython-input-6-9c5db07d999b>", line 1, in <module>
import vmfusion
File "