python-3.x

问题 I have two classes that are supposed to implement the same test cases for two independent libraries (let's call them LibA and LibB ). So far I define the test methods to be implemented in an abstract base class which ensures that both test classes implement all desired tests: from abc import ABC, abstractmethod class MyTests(ABC): @abstractmethod def test_foo(self): pass class TestsA(MyTests): def test_foo(self): pass class TestsB(MyTests): def test_foo(self): pass This works as expected, but

问题 I'm trying to get tensorflow working on my MacBook pro M1. However, I keep getting the following error when trying to import: zsh: illegal hardware instruction python I have downloaded and installed tensorflow via this link. These were my installation steps: install a venv: python3 -m venv venv . drag the install_venv.sh (which is located within the downloaded folder) file to the terminal, add -p at the end. select the directory of the venv as the location where tensorflow should be installed

问题 I'm trying to get tensorflow working on my MacBook pro M1. However, I keep getting the following error when trying to import: zsh: illegal hardware instruction python I have downloaded and installed tensorflow via this link. These were my installation steps: install a venv: python3 -m venv venv . drag the install_venv.sh (which is located within the downloaded folder) file to the terminal, add -p at the end. select the directory of the venv as the location where tensorflow should be installed

问题 I'm trying to get tensorflow working on my MacBook pro M1. However, I keep getting the following error when trying to import: zsh: illegal hardware instruction python I have downloaded and installed tensorflow via this link. These were my installation steps: install a venv: python3 -m venv venv . drag the install_venv.sh (which is located within the downloaded folder) file to the terminal, add -p at the end. select the directory of the venv as the location where tensorflow should be installed

问题 This question already has answers here : Draw a transparent rectangle in pygame (5 answers) Closed 2 months ago . How to make pygame.draw.circle transparent (add alpha level), as for "surface" "set_alpha"? I found a solution only in changing the color of pygame.draw.circle to less bright 回答1: You've to use a pygame.Surface. Create a Surface with a per pixel alpha image format. e.g: radius = 100 circle = pygame.Surface((radius*2, radius*2), pygame.SRCALPHA) And draw a transparent circle on it.

问题 The following code works in Python 2.7, to dynamically inject local variables into a function scope: myvars = {"var": 123} def func(): exec("") locals().update(myvars) print(var) func() # assert "var" not in globals() It's a bit subtle, but the presence of an exec statement indicates to the compiler that the local namespace may be modified. In the reference implementation, it will transform the lookup of the name "locals" from a LOAD_GLOBAL op into a LOAD_NAME op, enabling addition to the

问题 This question already has answers here : What is the difference between shallow copy, deepcopy and normal assignment operation? (11 answers) Closed 4 years ago . Say I have a list a with some values, and I did a b = a[:] . Then modifying the contents of list b won't change list a as per what I've read. So, this means its a deep copy. But python documentation still refers to this as shallow copy. Can someone clear this for me? 回答1: To demonstrate what shallow copy means: a = [ [1,2], [3,4,5] ]

问题 I am working on a Python script to replicate some Postgresql tables from one environment to another (which does a little more than pg_dump ). It works except when I am copying a table that has bytea data type. I read the source table data in memory, then I dump the memory in the target database with concatenated inserts. Here is my method that produces an insert statement: def generateInsert(self, argCachedRow): colOrd = 0; valClauseList = [] hasBinary = False for colData in argCachedRow:

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Python Check if all of the following items is in a list So I want to test whether both word and word1 are in the list lst. Of course, I could write: if word in lst and word1 in lst: do x But I wondered if I could shorten that statement to something like: if (word and word1) in lst: do x Of course, that does not work, but is there anything effectively similar that will? I tried the following, but as you can see,

问题 This question already has answers here : Closed 8 years ago . Possible Duplicate: Python Check if all of the following items is in a list So I want to test whether both word and word1 are in the list lst. Of course, I could write: if word in lst and word1 in lst: do x But I wondered if I could shorten that statement to something like: if (word and word1) in lst: do x Of course, that does not work, but is there anything effectively similar that will? I tried the following, but as you can see,