I want to speed up my python code so i tried to translate it in c thanks to cython. I followed the basics tutorials and other youtube videos and i finally could create a functions_cython.c file. But somehow i just can't import it. I tried to import it in my main file, i also tried in another file named 'testing.py' but I always receive errors saying that the module 'functions_cython' does not exist, while it actually is in the file. Do you have any idea why ? (i linked some images if that can help)
The problem was because I was using PyCharm's "community version" and this version (in opposition of the professional one) does not allow to import .c formats. I switched to VS Code.
Related
I am new with programming, so it is maybe harder for me to understand but I have the following issue:
I have a script that imports "eurostag.dll", which according to its manual, should work until Python 3.6. (but the manual is not updated, so it may work also with later updates, I assume).\ The issue is that I have Python 3.8. and when running the script I receive the following message:
"Failed to load EUROSTAG library (Could not find module 'D:\Eurostag\eustag_esg.dll' (or one of its dependencies). Try using the full path with constructor syntax.)"
I have tried to move the .dll library where the script is, but nothing changed. I tried also changing the directory with os.chdir, but the same message appears (with the same 'D:\Eurostag\eustag_esg.dll', so the directory was not changed.
Does anybody know if there is any workaround for this?
Thank you!
I'm new to Python and using PyCharm professional as my IDE. I have a small section of code that I want to work with from a longer file, so I created a "scratch file" with Python set as the interpreter. However, even just with importing modules I'm getting errors that the modules can't be found (even with standard modules). The file is set as a "Python" scratch file, so I'm not sure what else I need to do. The code I'm trying to run is:
from zipfile import ZipFile
import urllib
testfile = urllib.request.urlretrieve("https://ihmecovid19storage.blob.core.windows.net/latest/ihme-covid19.zip", "ihme-covid19.zip")
print("File saved at: " + (str(os.getcwd())))
with ZipFile('ihme-covid19.zip', 'r') as zipobj:
print(zipobj.printdir())
zipobj.extractall()
Everything is showing up with an error - no module urllib, no module zipfile, etc.
This may come across like a non-answer, but I do think this is a bug in Pycharm.
I even downloaded an update, restarted pycharm, and rebuilt my indexes. Same thing, here -- core Python modules are not registering as being importable (i.e. import sys or import inspect both failing type-checking).
We should probably move this to Pycharm's bug tracker. For example:
Here is a similar issue around a specific import NamedTuple
Here's an issue around the default interpreter in scratch files
There may be a better existing bug ticket, so please do look and report back here -- I'll update this comment if someone finds or creates a better bug ticket on youtrack.jetbrains.com and shares the link.
I am currently learning Python and I work on a project where I need a launcher to launch a series of the same script.
So, I have the launcher calling my other script, and I need the second script to import modules for it to work. But then I get the infamous ModuleNotFound: no module named "". When I launch the file myself, it works properly as intended and the module is found.
LAUNCHER
i=0
while i<1000:
print('Creating file number '+str(i)+'')
os.system('C:\\Users\\Gauthier\\Desktop\\file.py')
time.sleep(int(frequency))
print('File number '+str(i)+' created')
i+=1
I guess that must be a miscomprehension on my side, but after reading tens of questions on stackeoverflow and other forums, the official documentation and some tutorials, I can't find the proper way to import a module in a script which is itself launched by another file.
As file.py requests data from APIs, I cannot just read the script with
exec(open('file.py').read())
because I need multiple instances of the same script to be launched at the same time.
I am sorry if I missed something obvious, but it's been days -- I've uninstalled Python multiple times, tried a lot of different ways to call a file from another-- but I finally came here to ask for help.
Thanks!
I simple work around could be that you can add the path in
sys.path.append('/usr/lib64/python2.7/')
sys.path.append('<path to your modules>')
and then import your packages.
A similar statement can be used as many times and can be used to import your modules as well.
I have a small python script that needs to do some simple stats on some lists of numbers - the sort of thing the statistics.py library seems suitable for.
From what I can make out of the info on python.org, it should be part of the standard library in python 3.4.1 (on Win 64 bit), but I'm struggling to access the functions.
import statistics just gives a 'no module named 'statistics' error
Looking through the python34\Lib directory doesn't seem to show a statistics folder, and creating one and saving the statistics.py file available from python.org doesn't seem to make any difference.
Googling for how to install python libraries gives lots of examples referencing setup.py files and command line sequences, but i don't see how they relate to the statistics.py file available.
I'm obviously missing something (probably obvious!) but being a newbie at this i can't work out what it is. Any pointers?
I had the same problem, and instead of:
import statistics
I wrote:
from Lib import statistics
Good Luck!
I'm following a tutorial to call python code from a C++ program from the python docs.
Everything works just fine when trying to call the multiply example. Now if I add a line to the python source code importing a library, lets say openpyxl,
from openpyxl import load_workbook
I receive an error from python
ImportError: No module named openpyxl
I thought if I import a system library, I wouldn't have any problems, but I also get an error if I try to import datetime.
I don't have any error if I import the file from the python console. The openpyxl library is installed in my system.
So my question is: how to import python source code that needs to import packages?
EDIT: Ok, I forgot to mention something, I have not been completely honest with you guys, I'm sorry.
Trying to run the example I run into a problem: I couldn't make python found my multiply.py file, and the line PyImport_Import always return null.
My solution was to add the path in which I knew my python source was by using PySys_SetPath. The problem is that I just realized that this function doesn't append a new directory, it just overwrites the PYTHONPATH. So now python can find multiply.py, but absolutly anything else.
Of course I've deleted that line but now I have another question, why does python can't find my source if the file is just in the same directory of the C++ compiled program?
The I realized that my sys.path from my python console was a little different from the path showed in my embedded python: the first one had at the beginning of the list an empty string ''. I'm not a python expert, but when I add that line to my path I could import the multiply.py so it seems that was the reason I couldn't import modules that were located to relative to my executable was the missing of this empty path -but still don't know what it means-.
I have to thank to #paul-evans who give me the idea of adding the path to find my files.
This is what PYTHONPATH is for. You can set it as an environment variable containing a list module directories, or in the code itself something like:
import sys
sys.path.append("path/to/openpyxl/module")