After some looking online I found (here) that the issue was related to conflicting pip installs (I have a version already installed for Python 2.7 and apparently this is not compatible with the version that ships with Python 3.4. To get around this issue I simply de-selected pip from the install options shown below and … Read more
You can subclass the concrete implementation, so this works: class Path(type(pathlib.Path())): Here’s what I did with this: import pathlib class Path(type(pathlib.Path())): def open(self, mode=”r”, buffering=-1, encoding=None, errors=None, newline=None): if encoding is None and ‘b’ not in mode: encoding = ‘utf-8’ return super().open(mode, buffering, encoding, errors, newline) Path(‘/tmp/a.txt’).write_text(“я”)
In python 3 all imports are absolute unless a relative path is given to perform the import from. You will either need to use an absolute or relative import. Absolute import: from parent.file import ClassName Relative import: from . file import ClassName # look for the module file in same directory as the current module
Yes, any coroutine that’s running inside your event loop will block other coroutines and tasks from running, unless it Calls another coroutine using yield from or await (if using Python 3.5+). Returns. This is because asyncio is single-threaded; the only way for the event loop to run is for no other coroutine to be actively … Read more
Update The BDFL (Benevolent Dictator For Life) has spoken, and the Enum documentation has changed to reflect all upper-case member names. The examples in the [previous] docs are lower-case primarily because one of the preexisting modules that Enum was based on used lower-case (or at least its author did ;). My usage of enum has … Read more
On Ubuntu and other Debian derivatives you have to install python3-pip to get Python3’s pip. apt-get install python3-pip
Here’s my attempt, using recursion, and keeping track of the size of each node and the size of children. class BstNode: def __init__(self, key): self.key = key self.right = None self.left = None def insert(self, key): if self.key == key: return elif self.key < key: if self.right is None: self.right = BstNode(key) else: self.right.insert(key) else: … Read more
The return value is seconds as a float. It is the total time taken to run the test (not counting the setup), so the average time per test is that number divided by the number argument, which defaults to 1 million. See the Time.timeit() documentation: Time number executions of the main statement. This executes the … Read more
You have not installed the Python 3 development package. Install python3.4-dev: apt-get install python3.4-dev The main package never includes the development headers; Debian (and by extension Ubuntu) package policy is to put those into a separate -dev package. To install numpy however, you need these files to be able to compile the extension.
Adding to @Jon Clements’ pathlib answer, I wanted to check if the folder is empty with pathlib but without creating a set: from pathlib import Path # shorter version from @vogdb is_empty = not any(Path(‘some/path/here’).iterdir()) # similar but unnecessary complex is_empty = not bool(sorted(Path(‘some/path/here’).rglob(‘*’))) vogdb method attempts to iterate over all files in the given … Read more