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Languages & runtimes · #python
TheAlgorithms/Python uses functools.lru_cache (or functools.cache on Python 3.9+) to memoize recursive dynamic-programming implementations such as Fibonacci, knapsack, and coin-change variants. Many of these decorators are applied without a maxsize , so every distinct argument tuple is retained for the lifetime of the process. My goal is to reuse one of thes
When testing asynchronous service integrations in Python 3.8+, unittest.mock.AsyncMock is commonly used to simulate external API clients without production credentials. While AsyncMock handles standard async def functions, complexity arises when the integration relies on nested asynchronous context managers. Specifically, if a client method returns an async
When a project is specified only via pyproject.toml (i.e. no setup.{py,cfg} files), how can it be installed in editable mode via pip (i.e. python -m pip install -e . )? I tried both setuptools and poetry for the build system, but neither worked: [build-system] requires = ["setuptools", "wheel"] build-backend = "setuptools.build_meta" [build-system] requires
Apparently list(a) doesn't overallocate, [x for x in a] overallocates at some points, and [*a] overallocates all the time ? Here are sizes n from 0 to 12 and the resulting sizes in bytes for the three methods: 0 56 56 56 1 64 88 88 2 72 88 96 3 80 88 104 4 88 88 112 5 96 120 120 6 104 120 128 7 112 120 136 8 120 120 152 9 128 184 184 10 136 184 192 11 144 18
Logging Error: Failed to initialize logging system. Log messages may be missing. If this issue persists, try setting IDEPreferLogStreaming=YES in the active scheme actions environment variables. Has anyone else encountered this message? Where is IDEPreferLogStreaming located? I don't know what any of this means. It's building my app successfully but then loa
I've made Lambda functions before but not in Python. I know in Javascript Lambda supports the handler function being asynchronous, but I get an error if I try it in Python. Here is the code I am trying to test: async def handler(event, context): print(str(event)) return { 'message' : 'OK' } And this is the error I get: An error occurred during JSON serializa
I use the following method a lot to append a single row to a dataframe. However, it has been deprecated . One thing I really like about it is that it allows you to append a simple dict object. For example: # Creating an empty dataframe df = pd.DataFrame(columns=['a', 'b']) # Appending a row df = df.append({ 'a': 1, 'b': 2 }, ignore_index=True) Again, what I
In a long-running Python process that repeatedly calls a function with identical arguments, the choice between functools.lru_cache(maxsize=128) paired with explicit cache_clear() and functools.cache hinges on two competing constraints: keeping resident memory bounded while ensuring cached results do not outlive changes to external mutable state such as files
I'm trying to install Pyenv, and I'm running on Ubuntu 22.04 LTS. but whenever I run this command sudo apt install -y make build-essential libssl-dev zlib1g-dev \ libbz2-dev libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev \ libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python-openssl \ git I get this error Unable to locate package pyt
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