New submission from Jonathan Hadida <ariel.had...@gmail.com>: This submission follows a post on StackOverflow: https://stackoverflow.com/q/51878397/472610
I have reproduced the unexpected behaviour with multiple python versions, either with a Homebrew install, or using Anaconda/Miniconda. Note that comments to the post on StackOverflow indicate that this behaviour could only be reproduced on Windows and Linux using conda with late versions of Python. THE ISSUE --------- Absolute imports seem to conflict with local files (not in any module). This is at odds with the documented behaviour (https://docs.python.org/3/tutorial/modules.html#the-module-search-path): "When a module named spam is imported, the interpreter first searches for a built-in module with that name." STEPS TO REPRODUCE ------------------ STEP 1: On OSX, use either: - A Homebrew-installed version (e.g. /usr/local/bin/python2 or 3) - A Miniconda2 or 3 installation - An Anaconda3 v5.2.0 installation (not tested with other versions, nor Anaconda2) NOTE: in cases 1 and 2, you need to install numpy manually. STEP 2: Create a directory structure as follows: . └── foo ├── a.py └── math.py 1 directory, 2 files where a.py contains "import numpy", and math.py contains "x++" (intentionally invalid). For example, the following bash code sets this up in a temporary folder: D=$(mktemp -d) mkdir "$D/foo" echo "import numpy" >| "$D/foo/a.py" echo "x++" >| "$D/foo/math.py" STEP 3: Go to that directory (the one containing folder "foo"), and run: <PythonExecutableFromStep1> foo/a.py The previous command causes the following error, for example using /usr/local/bin/python3 (Homebrew): Traceback (most recent call last): File "foo/a.py", line 1, in <module> import numpy File "/usr/local/lib/python3.6/site-packages/numpy/__init__.py", line 142, in <module> from . import add_newdocs File "/usr/local/lib/python3.6/site-packages/numpy/add_newdocs.py", line 13, in <module> from numpy.lib import add_newdoc File "/usr/local/lib/python3.6/site-packages/numpy/lib/__init__.py", line 3, in <module> import math File "/private/var/folders/j7/kd8mc69j25j0yw50q_08wmlm0000gt/T/tmp.FfJzdVuG/foo/math.py", line 1 x++ ^ SyntaxError: invalid syntax PROBLEM: The statement "import math" in numpy/lib/__init__.py should not resolve to foo/math.py, but rather, it should find the standard module "math". ADDITIONAL INFO --------------- Although I do not know what this list should look like, I would expect the list of builtin modules to be larger than this: > python3 -c "import sys; print(sys.builtin_module_names)" ('_ast', '_codecs', '_collections', '_functools', '_imp', '_io', '_locale', '_operator', '_signal', '_sre', '_stat', '_string', '_symtable', '_thread', '_tracemalloc', '_warnings', '_weakref', 'atexit', 'builtins', 'errno', 'faulthandler', 'gc', 'itertools', 'marshal', 'posix', 'pwd', 'sys', 'time', 'xxsubtype', 'zipimport') > python2 -c "import sys; print sys.builtin_module_names" ('__builtin__', '__main__', '_ast', '_codecs', '_sre', '_symtable', '_warnings', '_weakref', 'errno', 'exceptions', 'gc', 'imp', 'marshal', 'posix', 'pwd', 'signal', 'sys', 'thread', 'xxsubtype', 'zipimport') ---------- components: macOS messages: 323609 nosy: jhadida, ned.deily, ronaldoussoren priority: normal severity: normal status: open title: Absolute imports conflict with local files type: behavior versions: Python 2.7, Python 3.4, Python 3.5, Python 3.6, Python 3.7 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue34414> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
